Lab 3-11 ANS - Lab 3 - ANSWERS Sedimentary Rocks and...

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Lab 3 - ANSWERS Sedimentary Rocks and Sedimentary Structures 1. Fill out the sample analysis chart using these samples. (Sample # in front of term) Rock List (1-11): Structure List (12-19) 1 - Sandstone 2 - Coal 16 -Current ripples 11 - Siltstone 3 - Gypsum 18 - Cross bedding 6 - Shale 7 - Salt 12 - Planar bedding 10 - Arkose 8 - Conglomerate 19 - Graded bedding 9 - Micrite 4 - Oolitic Limestone 14 - Oscillation ripples 5 - Limestone 15 - Mud cracks 17 - Tracks 13 - Burrows 2. Define the “Principle of Original Horizontality”. In general, sedimentary rocks are deposited in horizontal layers. If layers are not horizontal then something happened after deposition. 3. Define the “Principle of Superposition” When a rock sequence is both undisturbed and horizontal – the youngest rocks are found on top. 4. What is the short phrase used to define the “Principle of Uniformitarianism”? “The present is the key to the past.” 5. What’s the difference between how current ripple marks are formed and how
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This note was uploaded on 12/15/2011 for the course GEOL 3413 taught by Professor Hileman during the Fall '11 term at Oklahoma State.

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Lab 3-11 ANS - Lab 3 - ANSWERS Sedimentary Rocks and...

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