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Which principle is exemplified by studying a modern river to learn about how ancient rock layers formed ? A. actualism B. lateral continuity C. uniformitarianism D. superposition
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Asked 1/8/2014 10:41:23 AM
Updated 1/8/2014 11:10:56 AM
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User: Which principle is exemplified by studying a modern river to learn about how ancient rock layers formed ? A. actualism B. lateral continuity C. uniformitarianism D. superposition

Weegy: The principle that is exemplified by studying a modern river to learn about how ancient rock layers formed is UNIFORMITARIANISM.
emdjay23|Points 3044|

User: Which geologic period lasted for almost 7/8 of earth’s history? A. the Quaternary Period B. the Carboniferous Period C. the Precambrian time D. the Phanerozoic Eon

Weegy: The answer is A. [ the Precambrian time... **The geological division that lasted for just over 7/8ths of the Earth's history is the Precambrian Super-Eon. It started 4576.2 million years ago with the formation of Earth and ended 542 million years ago at the start of the Cambrian Period. It is made up of the Hadean, Archean and Proterozoic Eons. Although the super-eon is widely recognised as a time division this is only an unofficial term. The ICS prefer to use the Eon when describing the time before the Cambrian. ]
simplekaren89|Points 370|

User: Which happened during the Paleozoic era? A. No life was present yet on earth. B. Bacteria were the dominant life-forms. C. Sponges and invertebrates dominated the seas. D. Bony fish evolved.



Weegy: Which happened during the Paleozoic era? A. No life was present yet on earth.
Expert answered|faythanne|Points 201|

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Asked 1/8/2014 10:41:23 AM
Updated 1/8/2014 11:10:56 AM
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faythanne, please only use Q&A sites as sources if no other sources are available.
Added 1/8/2014 11:10:56 AM
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