2009 Final study guide part 2 - MyGeologyPage

GEL 109 Final Study Guide 2009Stratigraphy Questions1. The following stratigraphic columns start during Cretaceous time and end during Tertiarytime based on the fossils present in the sediments. A comet impacted the Earth and caused amass extinction that caused extinction of the dinosaurs (except those that evolved into birds)along with many other organisms. Use magnetostratigraphy and event stratigraphy to correlatethese stratigraphic columns by drawing lines between them. You should have 2 time linesbetween each of the columns and a third time line between the Gulf of Mexico, Tethys, andPacific columns. (3 points)(Marl = a mix of clay-sized clay mineral grains and clay-sized carbonate mineral grains. Thegrey “Clay” is clay-sized clay mineral grains that were deposited immediately after the impact.don’t worry about the sedimentary structures in the column on the left; they represent shallowmarine storm and tidal deposits.)2. Of the stratigraphic columns above, which had the highest sedimentation rate and which hadthe lowest sedimentation rate? How can you tell? (2 points)