older, younger

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an undeformed sedimentary layer is ______ than the layer above and ________ than the layer below

the study of faunal succession allows

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matching of similarly-aged rocks from different outcrops

stratigraphy, fossils, and cross cutting relationships

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used by geologists to determine the relative ages in a rock sequence

2,000,000 years

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half life of 1,000,000 how many years did it take to go from 1,000 to 250?

a stratigraphic sequence is a vertical set of strate

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used as a chronological record of the geologic history of a region

decomposed organic material

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does not make a fossil

plant impressions, animal footprints, and loose animal bones

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make fossils

invertebrate shells

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the most common fossils in rocks of the last 500 million years

William "strata" smith

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credited with developing the principle of faunal succession

youngest

Answer:

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