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Forum Program

Optional pre-Forum field trips and short courses

Saturday, July 30

Field trip 1: Highlights of the Franciscan. Leaders: David Bero, Sonoma State; Christie Rowe & Samantha Carruthers, McGill University

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This trip will visit two world-famous highlights of the Franciscan Complex in Marin County, the Marin Headlands Terrane and Ring Mountain, to discuss the initiation of subduction in the Jurassic and accretion through the Cretaceous. The Marin Headlands Terrane consists of imbricate thrust sheets of basalt, chert and greywacke and is known for the extraordinary exposure of chaotic chevron folds in the chert sequences. The structural base of the terrane is the Point Bonita Seamount, where well-preserved pillows, dykes and sills are visible on a short walk to the Point Bonita Lighthouse that offers stunning views of the Golden Gate. We will visit the Rodeo Cove Thrust exposures on Cronkite Beach.

Ring Mountain is home to the most diverse collection of high pressure, low temperature metamorphic rocks anywhere in the Franciscan Complex. Eclogite-, blueschist-, amphibolite- and greenschist-facies metabasite blocks occur in a serpentinite matrix mélange below a harzburgite thrust sheet that caps the mountain. The exotic block mélange was thrust over a sliver of blueschist-grade broken formation (including clastics, metabasalts and chert), which was in turn thrust over folded prehnite-pumpellyite-facies sandstones and shales. This is a unique opportunity to hike through the structural evolution and metamorphic inversion that characterizes the subduction complex.

Field trip 2: Eastern Northern Coast Ranges (Wine Country Geology). Leader: Eldridge Moores, UC Davis

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• Walking will be minimal. Climate varies considerably from west to east in the northern Coast Ranges, from cool and maritime near the coast (temperature ~ 20-30°C) to dry and, in the summer, hot (temperature 30-40°C). Please bring sunscreen, hat, light jacket, water, light walking shoes, TP, etc.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This one-day field trip plans to traverse parts of the northern Coast Ranges east of Rohnert Park in Sonoma Valley, Napa Valley, and eastward. We will travel through Sonoma Valley, the Mayacamas Mountains to the east, Napa Valley, and the Vaca Mountains, between Napa Valley and the Sacramento Valley. We will examine exposures of the three main units of the California active continental margin–the Great Valley Sequence, Coast Range Ophiolite, and Franciscan Complex, younger volcanic rocks, active branches of the San Andreas fault system, and possible evidence for active folding and thrust faulting.

Short course 1: Introduction to Electron Backscatter Diffraction (EBSD): sample preparation and analysis. Leader: Matty Mookerjee

• Start time is 10:00 am in Darwin Hall, Room 129. Note: you must be pre-registered for the workshop in order to participate.

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This course is designed to be a very basic introduction to analyzing crystallographic fabrics via Electron Backscatter Diffraction (EBSD), specifically for individuals who have no previous experience with EBSD. During the morning, we will prepare some quartz-rich thin sections (some of which can be provided by the course participants) for EBSD analysis using an automated grinder/polisher (Buehler EcoMet/AutoMet) and vibratory polisher (Buehler VibroMet). In the afternoon, we will analyze some of those thin sections on the Scanning Electron Microscope via EBSD and EDS (electron dispersive spectroscopy) and produce both crystallographic and chemistry maps, respectively.

Short course 2: New methods for creating admissible cross sections. Leader: Kurt Burmeister and Scott Giorgis

• Start time is 1:00 pm in Darwin Hall, Room 128. Note: you must be pre-registered for the workshop in order to participate.

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This workshop will present a modified version of the classic Busk (1929) and Kink (Suppe, 1989) methods that provide students with a quick and effective approach for constructing geologically admissible cross sections of strata involved in parallel folds. This technique combines the mechanical control of traditional methods with the speed of freehand sketching. In addition to classroom and laboratory applications, this method is particularly well suited for courses that require students to construct cross sections from their own geologic map data. Students in these courses are commonly encouraged to use their field data to sketch subsurface projections. Unfortunately, while constructing cross sections with freehand projections can be a quick and effective method for resolving working hypotheses, this technique requires a level of experience and insight that most students are still developing. Without these skills, students must rely upon the mechanically rigorous methods (e.g., Busk/Arc and Kink methods) if they are to construct geologically admissible cross sections from their data. These formal methods can be cumbersome and often require specialized drafting tools. Furthermore, even the slightest of inconsistencies in a student's field data will often lead to frustrating complications when using traditional cross section construction methods. This informal workshop will provide participants with hands-on opportunities to explore this new method and consider ways it can be implemented into existing courses. No prior experience with the Busk and/or Kink methods is needed.

6:00 Dinner on your own

Sunday, July 31

Field trip 1: Active faulting in the Napa Valley. Leaders: Alex Morelan, Chad Trexler, and Mike Oskin, UC Davis

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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The Mw 6.0 South Napa earthquake occurred on 24 August 2014 along the southern extent of the West Napa fault. Despite its relatively small moment magnitude, the earthquake produced 14 km of surface rupture, with a maximum coseismic right-lateral slip of ~30 cm (right-lateral) in the Browns Valley neighborhood of Napa, 10 km north of the epicenter in American Canyon. The surface rupture on the West Napa fault strikes north-northeast, bending to the north at its northern end, terminating in a series of small stepovers. This field trip will visit sites along the surface rupture where tectonic slip from the 2014 event may still be preserved. Most evidence of the surface rupture has been destroyed by surface processes and infrastructure repair. Additionally, we will visit sites in northern Napa Valley, where new evidence indicates that the West Napa fault transitions to reverse sense and has produced both single-event and composite fault scarps, and folded alluvial fan deposits.

Field trip 2: Inherited structural complexity and active deformation in the eastern Coast Ranges (Eastern Franciscan and CRF). Leaders: Ben Melosh and Bob McLaughlin, USGS

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This trip will focus on the structural and stratigraphic interfaces between the lower Great Valley Group, the Coast Range ophiolite and parts of the Franciscan Eastern belt in the Cache Creek – Lake Berryessa area of the eastern Coast Ranges. We will explore the structural complexity and juxtaposition of these different terranes and discuss the interaction of older and modern styles of deformation in the area. We will visit outcrops of different terranes and structural domains in the GVG and CRO to key our eyes into the rocks. We will then focus on large-scale relations of terrane boundaries and geometries of active deformation in the region. We are particularly interested in spurring discussions of the influence of fundamental Mesozoic and early Tertiary bedrock structure on the geometry and kinematics of modern deformation.

Short course 1: Statistical treatment of structural geology data. Leaders: Josh Davis, Sarah Titus, and Basil Tikoff

• Start time is 8:00 am in Darwin Hall, Room 128. Note: you must be pre-registered for the workshop in order to participate.

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Data sets in structural geology and tectonics frequently include geometric data types such as directions, orientations, and ellipsoids. Statistics offers various techniques for understanding the uncertainty inherent in such data, but these techniques are not well known in geology. This short course describes a few basic statistical tools: plotting, averaging, regression, and inference (confidence regions and hypothesis tests). First, we apply these tools to directional data, which include fault poles, lineations, paleomagnetic directions, etc. The second part of the course describes orientation statistics, which treats foliation-lineation pairs, folds, slickensides, crystallographic orientations, and other orientational data. Finally, we introduce ellipsoid statistics, which is applicable to the analysis of ellipsoids, including deformed clasts, SPO, and AMS. No prior experience in statistics is needed. Participants will need their own laptop computers. In the days before the short course, we will send instructions for installing the necessary free software.

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Forum main program

Monday, August 1 - Forum Day 1

8:00-8:10 Forum introduction: Matty Mookerjee

8:10-12:00 Session 1: Faulting and Fluid Flow (Student Center, Ballroom B-C)

8:10-8:15 Introduction James Kirkpatrick, session chair

8:15-8:35 Talk: Insights into earthquake rupture and recovery from paleoseismic faults Christie Rowe, McGill University, with many students and collaborators at McGill and elsewhere Download presentation (Acrobat (PDF) 5MB Aug3 16)

8:40-9:00 Talk: The geomorphic signature of strike-slip faulting Alison Duvall & Sarah Harbart, University of Washington; Gregory Tucker, CIRES and University of Colorado, Boulder

9:05-9:25 Talk: Parsing the structurally-controlled fluid migration history of the Moab Fault, UT with carbonate clumped isotope thermometry Keith Hodson, Juliet Crider, and Katharine Huntington, University of Washington Download presentation (Acrobat (PDF) 9.6MB Aug3 16)

9:30-9:50 Talk: Early strain localization associated with a low-angle normal fault system active across the brittle-plastic transition Justin La Forge & Barbara John, University of Wyoming; Craig Grimes, Ohio University; Holger Stünitz, Universitetet i Tromsø; Renee Heilbronner, Basel University

9:55-10:25 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• Characterizing the regional fluid-flow system of the Wyoming Salient, Sevier Fold-Thrust Belt David Brink-Roby and Gautam Mitra, University of Rochester; Adolph Yonkee, Weber State; Mark Evans, Central Connecticut University
• Characterizing deformation of Neogene rocks near Point Arena, California Daniel Cicchetto, Sonoma State University
• Fault system evolution, reactivation and basin formation during the Late Cenozoic in the Western Great Basin Scott R. Kerstetter, David T. Katopody, & John S. Oldow, The University of Texas at Dallas
• Fault surface geometry as a record of deformation processes James Kirkpatrick, McGill University
• Trapping nanoparticles: A structural approach for concentrating precious metals in vein-hosted ore deposits Nicolas Harrichhausen & Christie Rowe, McGill University; Warwick Board & Charles Greig, Petroleum Resources, Inc.
• Microstructures in calcite veins along polygonal faults in the Khoman Formation, Western Desert, Egypt Tyler Ramey, Sonoma State University; Aubrey Coon & Barbara Tewksbury, Hamilton College; Matty Mookerjee, Sonoma State

10:25-12:00 Posters and coffee (Student Center, Ballroom D)

12:00-1:00 Lunch

1:00-2:00 Group discussion: Advances in Cyberinfrastructure in the SG&T Community (Student Center Ballroom B-C))

2:00-6:30 Session 2: Analog Modeling and Computational Techniques (Student Center Ballroom B-C)

2:00-2:05 Introduction Saad Haq, session chair

2:05-2:25 Talk: Quantifying deformation in ridge-transform systems: An example from the Troodos Ophiolite, Cyprus Sarah Titus, Chelsea Wagner, Sarah Alexander, and Joshua R. Davis, Carleton College

2:30-2:50 Talk: The development of out-of-sequence thrusts in mountain belts: Insights from physical models and image correlation Saad Haq, Purdue University

2:55-3:15 Talk: Structural geology with Structure-from-Motion: Multi-view photogrammetry at the Whaleback Anticline, Bear Valley, PA Juliet G. Crider & Kevin R. Hodson, University of Washington; Mary Beth Gray, Bucknell University; Arlo Weil, Bryn Mawr College

3:20-3:40 Talk: A comparison between modelling of Coulomb stress and field observations of off-fault strain around pseudotachylyte fault veins, Norumbega Fault System, southern Maine Catherine Ross & Christie Rowe, McGill University; Mark Swanson, University of Southern Maine

3:45-4:15 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• Bayesian Markov chain Monte Carlo methods for modeling rock deformation Joshua Davis & Sarah Titus, Carleton College
• Analog modeling of fault asperity kinematics using a modified squeezebox design and wax media Matty Mookerjee, Sonoma State University; Kyle Kucker, Redwood Hill Farm; Daniel Martin & Paige Paquette, Sonoma State University
• The influence of localized glacial erosion on exhumation paths in accreting Coulomb wedges: Insights from particle velocimetry analysis of sandbox models Patrick Newman & Saad Haq, Purdue University
• Analog modeling of Mexican Fold and Thrust Belt in central México Alberto Vásquez Serrano & Gustavo Tolson, National Autonomous University of Mexico
• On the limits of the Inverse SURFOR Wheel in fabric analysis Gary Solar, State University of New York, Buffalo State
• Earth-Centered Communication for Cyberinfrastructure (EC3): Incorporating a joint cyber-science and geoscience perspective into designing field data management systems Taylor Swain & Matty Mookerjee, Sonoma State University; Marjorie Chan, University of Utah; Yolanda Gil, University of Southern California; Charles Goodwin, UCLA

4:15-6:00 Posters and coffee (Student Center Ballroom D)

6:00-7:00 Dinner

Tuesday, August 2 - Forum Day 2

8:00-12:00 Session 3: Regional Tectonics I: Cordilleran Geology (Student center, Ballroom B-C)

8:00-8:05 Introduction Elisa Fitz-Diaz and Raphael Gottardi, session chairs

8:05-8:25 Talk: The Mexican Fold and Thrust Belt: Structural development, timing and tectonic mechanism Elisa Fitz-Diaz & Tim Lawton, National Autonomous University of Mexico; Gabriel Chávez-Cabello, Facultad de Ciencias de la Tierra, UANL

8:30-8:50 Talk: Thermomechanics of a detachment shear zone, Picacho Peak, AZ Raphael Gottardi, University of Louisiana at Lafayette

8:55-9:15 Talk: Strain localization and megathrust slip accommodation modes in the Franciscan Complex, California John Wakabayashi, California State University, Fresno

9:20-9:40 Talk: "The Bridge" from Earthscope to EarthsCAN: Across the Northern Cordilleran from the Pacific Ocean to the Beaufort Sea Katherine Boggs, Mount Royal University; Maurice Colpron, Yukon Geological Survey; Julie Elliot, Purdue University; Roy Hyndman & Kristin Morell, University of Victoria

9:45-10:20 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• Three dimensional strain and kinematic vorticity analysis of mylonites from the Bitterroot Lobe Detachment, North American Cordillera Andre Bruvry, Asbestos TEM Laboratories; Alexa Melcon, North Coast Regional Water Quality Control Board; Matty Mookerjee, Sonoma State University
• Deformation of Franciscan blueschists and eclogites at depth in a subduction zone Samantha Carruthers & Christie Rowe, McGill University
• Quantifying thinning and extrusion associated with an oblique subduction zone: An example from the Rosy Finch Shear Zone Forest Fortescue, North Coast Regional Water Quality Control Board; Andrew Canada, University of Idaho; Matty Mookerjee, Sonoma State University
• Heterogeneous exhumation of mid-crustal rocks along the Hayes restraining bend of the Central Denali Fault Laura Tait & Sarah roeske, University of California, Davis; Matty Mookerjee, Sonoma State University
• Ductile shear zone of the Late Paleozoic at eastern Mexico: The Teziutlán Metamorphic Complex as a Middle America piece for reconstructing Pangea Luis Javier Gutiérrez Trejo, Mario Alfredo Ramos Arias, & Edgar Ángeles Moreno, National Autonomous University of Mexico

10:20-12:00 Posters and coffee (Student Center, Ballroom D)

12:00-1:00 Lunch

1:00-2:00 Group discussion: SGTF Business and Organization (Student Center, Ballroom B-C)

2:00-6:00 Session 4: Regional Tectonics II (Student Center, Ballroom B-C)

2:00-2:05 Introduction John Waldron and Yvette Kuiper, session chairs

2:05-2:25 Talk: Subduction initiation in the Appalachian-Caledonide orogeny John Waldron, University of Alberta; David Schofield, British Geological Survey; Brendan Murphy, St. Francis Xavier University

2:30-2:50 Talk: Gondwanan fragments in the Southern Appalachian Piedmont Allen J. Dennis, University of South Carolina, Aiken

2:55-3:15 Talk: A model of subduction of a mid-Paleozoic oceanic ridge - transform fault system in the northern Appalachians: a comparison with modern western North America Yvette Kuiper,Colorado School of Mines

3:20-3:40 Talk: Building the Pamir-Tibet Plateau: Crustal stacking and orogen parallel evasion of upper and middle crustal material in the Pamir David Rutte, UC Berkeley; Lothar Ratschbacher, TU Bergakademie Frieberg; Konstanze Stübner, Eberhard Karls Universität Tübingen; Michael Stearns, University of Utah

3:45-4:15 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• Orogen-parallel L-tectonites from Pelling-Munsiari thrust of Sikkim Himalayan fold thrust belt: A kinematic study using multiple, incremental strain markers Jyoti Prasad Das & Kathakali Bhattacharyya, Indian Institute of Science Education and Research, Kolkata; Matty Mookerjee, Sonoma State University; Pritam Ghosh, Indian Institute of Science Education and Research, Kolkata
• The evolution of the Andes of Central Chile and Argentina: Constraints using structural cross sections, geophysics, and thermochronology Marcelo Farias, University of Chile; Mark Brandon, Yale University
• Characteristics and distribution of brittle-ductile structures associated with dextral transpression along the Larder Lake-Cadillac deformation zone in the southern Abitibi subprovince, Canada Ben Frieman, Yvette Kuiper, & Thomas Monecke, Colorado School of Mines; Nigel Kelly, University of Colorado - Boulder
• The geometry of accreted "packets" in subduction zones; Examples from the Eastern Belt of the Franciscan in California and the Torlesse Terrane in New Zealand Thomas C. MacKinnon
• The Alleghanian Orogeny from start to finish: As chronicled by the Narragansett Basin, Southeastern New England Daniel Murray, University of Rhode Island

4:15-6:00 Posters and coffee (Student Center, Ballroom D)

6:00-7:00 Dinner

7:30-9:00 Preparing for an academic career in the geosciences - a special evening session for grad students and post-docs (Darwin Hall 128) Leaders: Barbara Tewksbury and others

• Are you interested in a future faculty position? Come to this informal "speed dating" session where you will have a chance to talk with current faculty about what it's like to teach and do research at a wide variety of academic institutions and get advice on how to prepare for an academic job search.
• On the Cutting Edge has an extensive set of online resources on preparing for an academic career. Topics include the job search process, preparing to teach, moving your research forward, and career planning. On the Cutting Edge also has resource pages for early career faculty, which provide information and advice useful for those who are starting to think about academic careers, as well as those already in faculty positions.

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Wednesday, August 3 - Forum Day 3

8:00-12:00 Session 5: Thermochronology, Metamorphic Petrology, and Tectonics (Student Center, Ballroom B-C)

8:00-8:05 Introduction Howell Bosbyshell, session chair

8:05-8:25 Talk: Zircon (U-Th)/He age-eU correlations reveal long-term thermal history of Laurentian basement Devon A. Orme, Stanford University; William R. Guenthner, University of Illinois, Urbana-Champaign; Andrew K. Laskowski & Peter W. Reinsers, University of Arizona

8:30-8:50 Talk: Tectonic evolution of the Yarlung Suture Zone, Lopu Range Region, Southern Tibet Andrew Laskowski & Paul Kapp, University of Arizona

8:55-9:15 Talk: Testing deformation-enhanced element mobility in plagioclase Naomi Barshi, Christie Rowe, & Vincent van Hinsberg, McGill University

9:20-9:40 Talk: Formation of plagioclase-Al₂SiO₅ coronas on quartz inclusions in garnet during transtensional exhumation of high-pressure high-temperature metamorphic rock Howell Bosbyshell, Elizabeth Noble, Laura Burns, Tim Lutz, & Cori Trice, West Chester University of Pennsylvania

9:45-10:20 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• New observations on the northern San Andreas Fault system: Fast slip rates on the Santa Cruz Mountain section of the San Andreas fault and creeping on the San Gregorio fault? Kimberly Blisniuk, San Jose State University
• Relict basin closure inferred from detrital zircon provenance in the Caucasus: A solution to missing Arabia-Eurasia convergence? Eric Cowgill, University of California, Davis; Adam Forte, Arizona State University; Nathan Niemi, University of Michigan; Mikheil Elashvili & Tea Godoladze, Ilia State University, Tblisi, Georgia
• Lawsonite microstructures and fabric development at the slab-mantle interface Katherine F. Fornash, Donna L. Whitney, Christian Teyssier & Nicholas Seaton, University of Minnesota-Twin Cities
• Illite growth along a detachment zone and folds of the Sierra de Catorce, San Luis Potosi, Mexico Rodrigo Gutiérrez-Navarro & Elisa Fitz-Diaz, National Autonomous University of Mexico
• Metamorphic and tectonic evolution of a subduction complex: Insights from petrology and fabrics of metagabbro (Sivrihisar massif, Turkey) Patrica Kang & Donna Whitney, University of Minnesota

10:20-12:00 Posters and coffee

12:00-1:00 Lunch

1:00-3:15 Session 6: Pedagogy and Structural Geology and Tectonics (Student Center, Ballroom B-C)

1:00-1:05 Introduction Paul Karabinos, session chair

1:05-1:25 Talk: Pedagogical effectiveness of using digital applications for collection and interpretation of sed/strat and structural field data Lawrence Malinconico & David Sunderlin, Lafayette College

1:30-1:50 Talk: 3D models and animations for teaching structural geology and tectonicsPaul Karabinos, Williams College

1:55-2:05 Demonstration: Topographic Interactive Model (TIM) Phil Mooney, Sonoma State University & Chad Trexler, UC Davis

2:10-3:10 Group Discussion: What is working in our structural geology classes and what is not? Paul Karabinos (Student Center, Ballroom B-C)

3:10-6:00 Session 7: Applications of Modern Techniques: Geophysics, Geodetics, and Remote Sensing (Student Center, Ballroom B-C)

3:10-3:15 Introduction Dan Davis, session chair

3:15-3:35 Talk: Observing Late Pleistocene glacial tectonics using geophysical techniques Dan Davis, Stony Brook University

3:35-3:55 Talk: Reconciling GPS and geologic observations for long-term deformation of the Cascadia Forearc Mark Brandon, Yale University

3:55-4:10 Two-minute poster pitches (participants limited to 2 minutes each with 2 ppt slides)

• EarthsCAN a Canadian bridge from Earthscope into the future to maintain North American geoscience research momentum Katherine Boggs, Mount Royal University
• New insights about active detachment faulting in Death Valley, California Darrel Cowan & Paul Bodin, University of Washington; Mark Brandon, Yale University
• Extensively developed network of non-tectonic synclines in Eocene limestone of the Western Desert, Egypt: an example of hypogene speleogenesis? Barbara Tewksbury, Hamilton College; Elhamy Tarabees, Damanhour University, Egypt
• Intraplate fault records >400 ka of time-dependent earthquakes punctuated by clustered seismicity Randolph Williams and Laurel Goodwin, University of Wisconsin-Madison; Warrem Sharp, Berkeley Geochronology Center; Peter Mozley, New Mexico Tech

4:10-6:00 Posters

6:00-7:00 Dinner

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Optional post-Forum field trips and short courses

Thursday, August 4

Field trip 1: Introduction to the Strabo Data System. Leaders: Basil Tikoff & Randy Williams, University of Wisconsin

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This one-day field trip will introduce participants to the Strabo Data System and mobile application using actual outcrop examples. The Strabo Data System is a digital database system for structural geology and tectonics (SGT) data that is designed to facilitate digital recording and sharing of data within our community. The Strabo mobile application (iOS and Android devices) is being developed in conjunction with this database system, and allows quantification and tracking of hierarchical and spatial relations between structures at all scales in the field. We will provide a brief introduction to the underlying database structure with case studies from localities where the system has been deployed. We will then travel to Pt. Reyes where participants will be able to use the Strabo mobile application (iPads will be provided) to map and collect field data from numerous faults exposed in the area.

Field trip 2: Northern San Andreas Fault Deformation, Point Arena. Leaders: Matty Mookerjee, Daniel Cicchetto, Felix Desperrier, & Nick Bel, Sonoma State University

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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During this field trip, we will travel to the northern-most exposure of San Andres Fault related deformation exposed on land, near Point Arena, CA. At the Moat-Creek and Schooner Gulch Beach locations, we will look at deformation within the Neogene Schooner Gulch, Galloway, and Point Arena Formations. The deformation here is interpreted as being the result of either blind or poorly exposed imbricate thrust faults associated with the transpressional deformation along the SAF. There are abundant examples of off-fault-related folding (e.g., small-scale fault-bend-folds, fault-propagation-folds) as well as small-scale faulting structures (wedge faults and normal faults). Large-scale concretions (≈2m in diameter) become involved in the deformation in interesting ways. In addition to the tectonic deformation, we will examine evidence for paleoseismicity in the form of soft sediment deformation and clastic dikes. On our way to Point Arena, we will stop by Shell Beach to see a classic locality of Franciscan geology.

Short course 1: Teaching Structural Geology: use of tablet-based apps for mapping in our undergraduate structure courses. Leader: Larry Malinconico, Lafayette College

• Start time is 9:00 am in Darwin Hall, Room 128. Note: you must be pre-registered for the workshop in order to participate.
• Optional afternoon session from 1:00-3:00 pm.

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This workshop will explore the use of tablet applications for digital field mapping. In the morning session we will try some of the different applications listed below, with the option to test the apps in the field in the early afternoon.

Compasses: GeoCompass 2, Lambert, Field Compass
Vertical measurements: Theodolite
Mapping Programs: Clino, GeoFieldBook
Stratigraphic programs: Stratlogger

While several iPads will be available for use, participants are encouraged to bring their own iPads with Apps installed. Additionally, participants will be encouraged to share their favorite geologic field apps with the group.

Short course 2: Analysis, statistics, and presentation of geological spherical directional data using Orient (Acrobat (PDF) 5.4MB Jul25 16) Leader: Fred Vollmer

• Start time is 8:00 am in Darwin Hall, Room 023. Note: you must be pre-registered for the workshop in order to participate.

Orient software home page

Orient software user manual

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Orient is free software in development since 1986 for the analysis of directional data using spherical projections and related techniques. Orient 3 was released in 2015 with numerous enhancements, it is user-friendly for students, but designed for professionals. Following a "quick start" to illustrate ease of use, interactive features, and graphical output, and an introduction to data analysis and spherical projections, a variety of data sets (bedding, foliations, joints, crystallographic axes, paleomagnetic vectors, earthquake epicenters, and fault slickensides) will be used to explore more advanced topics, including contour plots, coordinate rotations, data visualization, confidence regions, spherical distributions, bootstrap statistics, kinematic analysis of fault data, and automated structural domain analysis of refolded folds. Additional topics may include small circle confidence cones (conical folds), cluster analysis (fracture sets and fold limbs), circular histograms, conical data (drill cores), UTM coordinate conversion, locating data on web-based maps, and plotting in Google Earth. The workshop will be informal, allowing discussion and hands-on analysis. Participants are encouraged to bring their own data sets for analysis. Computers will be available, although laptops with Windows, Macintosh, or Linux systems may be used. Participants may opt to attend only the morning session to accommodate travel plans.

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Friday, August 5

Field trip 1: Brewschist IV: Franciscan Complex and Brewpubs of Sonoma County. Leader: John Wakabayashi

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This trip views rocks near Lake Sonoma and on the Sonoma Coast that bear on a variety of subduction interface processes, such as high-pressure, low-temperature (including blueschist facies) metamorphism, exhumation of such rocks, different styles of subduction megathrust slip accommodation, and the origin of mélanges. We will see exceptional exposures of siliciclastic and serpentinite mélange matrix, with features suggesting sedimentary incorporation of exotic blocks, including rocks exhibiting higher metamorphic grade than the matrix. We will visit blueschist facies sandstones associated with black fault rocks and imbrication of ocean plate stratigraphy (OPS). The fault rocks and imbricated OPS may represent different styles of megathrust slip accommodation. We will also see rocks representing the petrologic Moho (ultramafic cumulates over mantle tectonite) of the Coast Range ophiolite that represents the upper plate "tectonic lid" over the Franciscan. Small breweries of Sonoma County have been at the cutting edge of the USA craft brewing revolution, and we will visit two en route (Bear Republic Brewing Company for lunch, and Stumptown Brewing Company), and finish the trip with dinner at the famed Russian River Brewing Company. This is why we call this the Brewschist Tour.

Field trip 2: Active Tectonics of the North Coast. Leaders: Carol Prentice and Steve DeLong (USGS)

• We will depart promptly at 8:00 am from the Parking Lot D. Please eat breakfast before hand, and please arrive by 7:45 so that we can depart on time.
• We will provide a boxed lunch, which you can pick up in the loading area in parking lot D. Note: you must be pre-registered for the field trip in order to participate.

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This field trip will focus on the geomorphology of the San Andreas Fault and uplifted marine terraces along the Gualala Block, between Fort Ross and Point Arena, CA. We will trace the surface rupture associated with the 1906 San Francisco earthquake, discuss fault slip rate and timing of pre-historic earthquakes, and explore the use of marine terraces to estimate uplift rates and horizontal fault slip rates. In addition, we will investigate variations in uplift rate across the fault and along the coast, as evidenced by overall topography, marine terrace elevations, and cosmogenic radionuclide studies.