GEOL-1010 Lecture Notes - Lecture 8: Unconformity, G1 Phase, Natural Hazard
5 Feb 2018
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Why do we care: we want to know the age of things, helps us answer a lot of questions in geology and science. Stratigraphy: unconformities- a break or a gap in your stratigraphic record, a time where you don"t have any rocks, in the layers you don"t have a rock to represent a certain period of time. Identification: have to examine very closely- there could one unconformity, there could be a few unconformities or a lot of them, duration, they take a really long time. Correlation with fossils: not all fossils are great for correlation, want to identify short spans of time. *know each technique and what they are used for. Geologic time scale: the entire history of planet earth, originally built via stratigraphy, fossils were key for defining boundaries, eon-era-period-epochs: smaller and smaller units of time, do not memorize this, just a few names and large events.
