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WHAT ARE ROCK LAYERS (GEOLOGIC TIME)?
Scientists use the rock layers to help them figure out the history of the planet. By investigating the layers, they also uncover fossils of organisms that lived in the past. By examining where in the rock layers fossils are found, scientists have been able to put together the geologic time scale, which is used to explain Earth’s 4.6-billion-year history.
To better understand rock layers (Geologic Time)…
WHAT ARE ROCK LAYERS (GEOLOGIC TIME)?.
Scientists use the rock layers to help them figure out the history of the planet. By investigating the layers, they also uncover fossils of organisms that lived in the past. By examining where in the rock layers fossils are found, scientists have been able to put together the geologic time scale, which is used to explain Earth’s 4.6-billion-year history.
To better understand rock layers (Geologic Time)…
LET’S BREAK IT DOWN!
Sedimentary Rock
Sedimentary rock is made from sediment that has been layered on top of each other and then pressed together, usually by more sediment. Many fossils are found in this type of rock because it was easily covered by the sediment and the rock was compressed around the organism.