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Earth Sciences 11 Online
OpenStudy (anonymous):

What type of rock can be found in river beds?

OpenStudy (anonymous):

@Willie579

OpenStudy (willie579):

I'm here. :P

OpenStudy (willie579):

Is this an ABCD question?

OpenStudy (willie579):

Igneous or metamorphic. Depending on the energy of the river, they could be anything from large, rounded cobbles or pebbles (as per classification of the Udden-Wentworth Scale), or sand and gravel as identified under other systems. - https://answers.yahoo.com/question/index?qid=20100412111227AASfAJk

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