EES 1030 Lecture 14: 14

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Earth & Environmental Sciences
EES 1030
John Adrain

EES:1030 Geologic Time II and Rock Rules October 13 , 2016 Study Guide Questions 1. In your own words, what does this Principle of Uniformitarianism state, and how is this related to the concept of rocks and minerals being environmental fingerprints? 2. Be able to write two sentences, one giving an example of relative dating and one giving an example of absolute dating. 3. Is there anywhere on Earth where we can observe, in a single outcrop, the complete record of Earth history? 4. What is stratigraphy? 5. Know Stenos principles and laws (ROCK RULES). You should be able to both match definitions to specific terms, and apply all of these to diagrams of rocks (so you need to understand all of these WELL). 6. Do Stenos principles and laws allow us to do relative or absolute dating? 7. When might igneous rocks break rock rules, and which rock rules do they break? Be able to give specific examples. 8. Know the 3 different kinds of unconformities that we might find, how they form, and what rock rules they break. 9. What is the Principle of Faunal Succession, and what does it let us do? 10. What are the characteristics of a good index fossil? 11. You should be able to recall the Eons; the Cenozoic, Mesozoic, and Paleozoic Eras, the Periods, and the epochs of the Cenozoic as well as the times at the boundaries of the Precambrianm Paleozoic, Mesozoic, and Cenozoic. Lecture Notes: NEWS 1. There is homework due EVERY THURSDAY! This is in the course syllabus and posted weekly to ICON. 2. Writingproject guidelines posted to ICON Geologic Time: an outline Geologic time: we have a TON of time and a TON of important events. How do we put order to this? We have only directly observed a miniscule fraction of the history of the Earth. We discussed absolute dating last Thursday, which lets us put absolute ages on rocks. Issue: environments vary through time, and absolutedateable material isnt available in most places. How can we match up areas that have radiometrically dateable material with areas that dont? Answer: by knowing how rocks work. Relative vs. absolute dating Methods: geologic dating. Absolute dating (gives a specific age): My little sister is 25 now! Your turn __________________________________ dating (comparative statements): Im older than my cat. You are... 1
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