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Social Sciences 19 Online
OpenStudy (anonymous):

after examing a sequence of horizontal sedimentary rocks, you determine that there is a considerable span of time for which no sedimentary rock layers exist at this location. You have discovered a

OpenStudy (anonymous):

Layer of igneous rock--volcanic activity (?)

OpenStudy (twopointinfinity):

I think volcanic activity too

rebeccaxhawaii (rebeccaxhawaii):

WELCOME TO OS any ideas?

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