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Presentation Transcript

  1. Compare Igneous Rock Sedimentary Rock

  2. Clastic Sedimentary Rock

  3. Sedimentary Rock • How do those layers form? • Order or process: Weathering Erosion Deposition Cementation & Compaction

  4. Mechanical Weathering • Disintegration/rock broken into smaller pieces • Frost Action • Abrasion (river, glacial, sandy environment) • Plants and Animals #2

  5. Chemical Weathering • Decomposition-rock’s minerals are changed into different substances. • Acid Rain • Oxidation • Hydrolysis • Caves

  6. Which minerals are susceptible? • Chemical Weathering • Calcite • Mechanical Weathering • Quartz, angular minerals

  7. Chemical WeatheringWhat affects the rate? Faster Chemical Weathering – Warm and Moist climate Faster Physical Weathering – Cold and Wet Climate

  8. Erosion • The transport of sediments/particles from a weathered rock by • Water • Wind • Glacier • Gravity

  9. Water • Distinguishing Characteristics: • rounded edges

  10. Wind • Distinguishing Characteristics • Flatten sand surfaces: Sand dune

  11. Glaciers • Distinguishing Characteristics • Striations-special scratch by minerals

  12. Effects of Erosion Landslide Mudslide

  13. Evidence of stream Erosion

  14. Evidence of Glacial Erosion U Shape Valley

  15. Sorted vs. Unsorted

  16. Factors of Deposition • Size • Density • Shape

  17. Two types of deposition • Water - sorted • Glacier - unsorted

  18. Alpine Glacier • Slow moving stream of ice that flows within valley walls

  19. Juneau Icefield in Alaska

  20. Arrete Horn cirque

  21. Continental Glacier • Glacier that covers a large part of a continent • Ex: Greenland, Antarctica

  22. Glacial Depositional Features

  23. Moraine and Till Till - Unconsolidated and unsorted rock material that is deposited by a retreating or melting glacier Moraine – The accumulation of glacial till

  24. Drumlin • Elongated whale-shaped hill formed by past glacial action as it moves over the till

  25. Drumlins in NYS • South ends of the Finger Lakes - northeast of Ithaca at the northern end of Cayuga (Rochester to Syracuse)

  26. Erratics • A large boulder that have been transported into an area by a glacier

  27. Kettles and Kame • Hollows left behind by melting ice as the last remnants of glaciers disappear

  28. Kame • Small coned shaped hill of sand and pebble. that are deposited by stream into the kettle

  29. Complete Illustration • When glacier melts, deposits slump down at the side and form long ridges - ESKER