Dating rocks with fossils


Back in 1793, there lived a land surveyor named William Smith. He worked in Southern England, and he got to see all kinds of different rock strata that were exposed in outcrops and canals. William Smith collected fossils from his work sites and, over time, he learned to recognize which fossils tended to show up in which rock strata. He began to identify rock layers by the fossils they contained, and he even noticed that the general order of strata was identical over many different parts of the country. Smith was the first person to understand the principle of fossil succession .

Following the law of superposition in geology, older fossils and rocks are found in lower strata than younger fossils and rock layers.


Dating rocks with fossils

Dating rocks with fossils



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