GEOSCI 100 Lecture Notes - Lecture 15: Guilin, Giant Sand, Trilobite
21 Mar 2018
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Angular - the bottom layer is an angled/tilted layer (lifted up by something) then horizontal layers on top. Disconformity - horizontal and horizontal with a gap. Nonconformity: principle of sedimentary facies association - (know the name but not the details) Rock units are shown by color or symbols to indicate where they are exposed at the surface. Demonstration - walking from the illinois border near. Would find one of the earliest forms of animal life. Dodge state park - st. peter sandstone - 456 million years ago. Giant sand dunes used to be here. Fitchburg - 456 million years ago super target used to be like guilin, china (tropical) Madison - stromatolite - 480 million years - looked like shark bay, australia (tropical) Baraboo area (north of madison) - geologic wonder for the midwest. -environmental changes such as a dried up body of water. *the oldest rocks in wisconsin are at the top*
