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What Do the Periods on the Geologic Time Scale Represent?
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Periods in geologic time scales represent time between occurrences, where a specific kind of life form was prevailing. They are time frames of rock developments in which slight rock displacements took place.
Q&A Related to "What Do the Periods on the Geologic Time Scale..."
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Usually, they represent periods between extinction events, where a particular type of lifeform was dominant.
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Mass Extinitions
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From most recent to oldest they are generally considered to be the following (except in Europe where the Mississippian and Pennsylvanian is combined into one period called Carboniferous
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An era, in geologic terms, is a geological time period encompassing two or more geologic periods.
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