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1.4 The Rock Cycle, and the Geologic Time scale (The geologic time scale…
1.4 The Rock Cycle, and the Geologic Time scale
The rock cycle
3types of rocks
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sedimentary
small pieces of rock, sand, slit,clay or soil created by weathering and erosion and pressure deposition and compaction
rock transformations
uplift, weathering, erosion, deposition, sedimentation and cemetation
weathering physical, chemical and biological
erosion: movement of sediment from one location to another by water, ice or wind
deposition: when sediment is dropped by water, ice or wind as it slows down
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The geologic time scale
significant developments like changes in atmosphere, geological activity, evolution, and extinctions of plant and animal life can be shown on a scale
changes such as occurs too slowly to be measured in days, months or years
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Rock dating
species evolve, live short, go extinct
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