Tuesday, April 17, 2012

Index Fossils

One tool that helps geologists to place geologic events in proper order, relative dating, is the use of index fossils. Index fossils allow geologists match rocks of the same age in different regions. An index fossil must be widespread geographically, easily identified and have a short geologic time period.
Also, different types of fossils organisms succeed one another in a definite order-fossil succession

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