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Earth Science - New York Regents August 2008 Exam


Base your answers to questions 26 and 27 on the photograph below, which shows a bedrock outcrop in northeastern New York State. Line AB is an unconformity between sandstone C and metamorphic rock D.

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: Multiple choice

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26.


The lower layers of sediment found in sandstone C were deposited 520 million years ago. During which period of geologic time did this deposition occur?
(1) Cambrian
(2) Ordovician  
(3) Silurian
(4) Triassic

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27.

After the metamorphism of rock D, which sequence of events most probably formed unconformity AB?
(1) flooding → deposition → erosion → uplift
(2) uplift → erosion → flooding → deposition
(3) deposition → flooding → uplift → erosion
(4) erosion → flooding → uplift → deposition

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  Half-n-half Clue
 

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