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Chapter 9

Geologic Time Vocab

QuestionAnswer
Describe the geologic time scale. a time table that outlines the development of Earth
Define a geologic column. an ordered vertical arrangement of rock layers based on their relative ages
Describe an ERA a unit of geologic time that includes two or more periods
Describe a PERIOD units of geologic time that combine to form an era
Describe a EPOCH units of geologic time that combine to form a period
What is a geologic period usually named for? the place where characteristic fossils were first discovered
What is the KT boundary? The boundary that accounts for the extinction of the dinosaurs
What element was found at the KT boundary and used as evidence of an asteroid impact? Iridium
Created by: Amatulli Science
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