How do sedimentary rocks reveal ancient environments?
What will be an ideal response?
Answer: Different sedimentary rock types indicate the physical and chemical processes active in ancient depositional environments. Sedimentary structures reveal details about physical processes in the depositional environment. Cross-beds also reveal the direction of moving water and air currents that transport sediment. Changes in environments or processes produce boundaries between beds of sedimentary rock. Observations of vertical successions of rocks with different features allow geologists to interpret environmental change over time.
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