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Geosphere 5 Vocabulary

Hydro/Biosphere Vocabulary Review

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Across
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Surface that represents a break in the rock record
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The division of Earth history into blocks of time
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A major division on the geologic time, which can be divided into periods
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Each bed is older than the one before it
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A subdivision of a period
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Fossil that is associated with a particular geologic time
Down
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Laws of of the past apply to day
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Remains or traces of prehistoric life
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Identification of sequences of events
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Equivalence of rocks of similar age in different areas
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A subdivision of an era
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The largest time unit on the geologic time scale