The Cretaceous/ Tertiary Boundary At Iridium Hill, Garfield County, Montana

Athro Limited

The goal of this virtual field trip to Iridium Hill, Montana is to investigate the disappearance of dinosaur fossils above the Cretaceous/ Tertiary boundary. The site provides rock outcrop photos of Cretaceous and Tertiary strata (Hell Creek and Fort Union Formations), stratigraphic sections and supporting text for this classic iridium-bearing locality. Topics include the K/T boundary, iridium concentrations, stratigraphy, sedimentology and, fluvial and lacustrine depositional environments.

This resource is referenced here:
Subject: Biology, Geoscience:Hydrology, Geology
Resource Type: Audio/Visual:Images/Illustrations, Activities:Virtual Field Trip, Activities
Focus on the Cretaceous: Paleontology
Topics: Earth surface, Hydrosphere/Cryosphere, Time/Earth History, BiosphereKeywords: ancient river deposits, Chicxulub impact, extinction