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Stratigraphy is a branch of geology that studies rock strata with an emphasis on distribution, deposition, age and evidence of past life.

Nicolas Steno, William Smith, Georges Cuvier, Alexandre Brongniart, and James Hutton developed the basic rules for the science of stratigraphy.

Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history.

Discover how geologists study the layers in sedimentary rock to establish relative age.

A chance encounter between determined fishermen and a great white shark off the Tuscan coast in 1666 sparked a chain of events that would help change humans views of fossils and Earth’s geologic past (Cutler 2003, pp. Nicolas Steno (1638-1686) dissected the head of this shark and realized fossil tongue stones believed to be petrified snake or dragon tongues were actually fossil shark teeth (Prothero 1998, p. One problem still existed, how do fossils become embedded in solid rock?

Steno recognized that fossils represent organisms that became buried in sediment, which later turned into rock.

Once they are able to manipulate the cards into the correct sequence, they are asked to do a similar sequencing activity using fossil pictures printed on "rock layer" cards.

Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.

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Same goes for someone who’s not over their divorce and has beliefs that affect their ability to be committed.

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If you can’t handle the pain of breaking up with someone, you are not ready to date, never mind marry.

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This week, he resurrects both projects with "I Still Love You," featuring Andrea Martin.

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