Imagine you are looking at an outcrop of shale that has several identifiable fossils in it. One species is known to have lived from 544 to 505 million years ago and another is known to have lived between 520 and 248 million years ago. What can you say about the age of your shale that contains fossils of both?
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Geography, 22.06.2019 07:00
In 1933 the 21st amendment was added to the u.s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?
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How does central place theory explain patterns in the size and distribution of cities?
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Imagine you are looking at an outcrop of shale that has several identifiable fossils in it. One spec...
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