Sentences with phrase «rock layers provide»
Sedimentary rock layers provide a more compressed view of climate, as each layer of sediment is made over a period of hundreds of thousands to millions of years.
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In the 18th and 19th centuries, geologists came to the region to study the neatly stacked layers of rock, which date to 250 million to 65 million years ago and provided evidence that the Earth was much older than the 6,000 years many thought at the time.
This provides the age of the rock layer where the fossil was found, which helps scientists date all the other material at that level.