Integrating Research and Education > EarthChem > Central America Volcanoes > Part 1 - Download the data

Part 1 - Download the data

  1. Go to Dr. Michael Carr's website at Rutgers University. Dr. Carr is a petrologist who has studied Central American volcanoes for many years.
  2. Under "Margins data files" click on the first file listed ( to download it your computer.
  3. Open the downloaded CAGeochem.xls file. This file lists data for 39 Quaternary volcanic centers that comprise the volcanic arc in Central America. Note that each row contains data for a rock sample from a volcanic feature within one of the 39 volcanic centers. Take particular note of the following columns:
    • Column A: country of origin
    • Column B: sample number
    • Column G: volcano name
    • Columns L-X: major-element data
    • Columns W-BK: trace-element data
    • Columns BL-BP: radiogenic isotope data
    • Column BY (Distance): the distance in km along the volcanic arc from some arbitrary starting point towards the NW end of the line of volcanoes. "Distance" increases as the volcanic arc is traversed from Guatemala -> Honduras -> Nicaragua -> Costa Rica.
    • Column BZ (Back): approximately the distance in km behind (to the NE of) the trench
    • Column CA (Ht-km): height of the volcanic feature above sealevel
    • Column CB (EdificeHt-km): height of the volcanic feature above the surrounding topography
    • Column CC (Volume-km3): volume of the volcanic feature (shields and stratovolcanoes will have large volume, while individual lavaflows or cinder cones will have much smaller volumes)
    • Column CD (CenterVol-km3): volume of the volcanic center of which the volcano is a part
    • Column CE (Crust-thick-km): the thickness of the continental crust beneath that volcano as determined by seismic surveys