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J. M. Weller
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J. M. Weller

American geologist

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contribution to geological research

  • In cyclothem

    …loose nomenclature led American geologist J.M. Weller to coin the term cyclothem to describe a series of beds deposited during a single sedimentary cycle, such as the deposits of layers during the Pennsylvanian period (or Late Carboniferous epoch, roughly 318 million to 299 million years ago). Cyclothem refers to the…

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