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Lecture

BIO211 Sept 19 2011
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Department
Biology
Course
BIO211H5
Professor
Jessica Hawthorn
Semester
Fall

Description
Relative dating answers what age are rocks? Absolute dating answers how old are the rocks? Strata: rock units distinguished by some physical, chemical, or palaeontological property, units of time are based on ages of strata Correlation: correspondence between geographically separated parts of stratigraphic unit Geochronologic (time) units: – Interval during which a time-rock unit is formed – Early and late Chronostratigraphic (time-rock) units: – All the strata in the world deposited during a particular interval of time – Upper and lower Stratigraphic range: total vertical interval in which a species occurs, form lowermost to uppermost Index fossils: Shorter stratigrap
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