EES 1030 Lecture 14: 14

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Ees:1030 - geologic time ii and rock rules. Earth history: what is stratigraphy, know steno"s principles and laws (rock rules). Lecture notes: news: there is homework due every thursday! This is in the course syllabus and posted weekly to icon: writing/project guidelines posted to icon. Geologic time: we have a ton of time and a ton of important events. 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 absolute-dateable material isn"t available in most places. To learn how we relatively order events in earth history, we will be focusing on layers (strata) of sedimentary rocks. Nicholaus steno: the father of stratigraphy (more on him here: http://academic. emporia. edu/aberjame/histgeol/steno/steno. htm) He was primarily an anatomist, but spent a glorious three years deriving geologic principles, publishing prodromus in 1669 before quitting the field.

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