Topography - Geosc 10 Thursday, April 8th, 1999...

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Thursday, April 8th, 1999 Announcements: none Lecture notes: I. Overview A. To have sedimentary rocks, you need water B. Sedimentary rocks are deposited (or formed) underwater C. Sedimentary rocks tell us about: 1. Paleo-environment 2. Animals, plants 3. Temperature D. Topography 1. "Source area"--what was eroding 2. Old mountains II. Kinds of sedimentary rocks A. Shale -----> B. Sandstone ----> *grain size varies so it tells you the energy of transport C. Limestone D. Conglomerate ----> E. Moraines (glacial) ----> F. Point bar (fluvial) ----> * depositional environment G. Deltas -----> III. Neptunism and Plutonism A. 18th century 1. No global fossil record 2. No magnetic dating 3. No radiometric dating 4. Poor global communication B. Prussian A. Werner 1. His goal was to find order to the rock system 2. So he developed the first classification scheme for minerals (this was used for the past 200 years) 3. First stratigraphy (making sense of layers) for the world 4. His classification for the world: a. Granites, gneisses (oldest rocks)
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Topography - Geosc 10 Thursday, April 8th, 1999...

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