Original horizontality relative dating


26-Oct-2017 19:09

Not only did the rock layers indicate changing environments they also revealed that different life forms have existed in different times.Long before geologists tried to quantify the age of the Earth they developed techniques to determine which geologic events preceded another, what are termed "relative age” relationships.

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Steno recognized that fossils represent organisms that became buried in sediment, which later turned into rock.These techniques were first articulated by Nicolas Steno, a Dane living in the Medici court of Italy in the 17th C.