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Geosphere 5 Vocabulary

Hydro/Biosphere Vocabulary Review

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