I know this is going to sound silly, but here goes. How old is the rock in the Boise River? the round rock.? thank you, Charlotte Ferguson
Answer:
This answer would be better suited for the Idaho Geological Survey. However, generally any specific rock in the bottom of any river really could be any age from the source rocks that "feed" that river. The Boise River flows through a variety of rock formations feeding the river.
Answered on:
Tuesday, February 17, 2015 - 12:39 PM MST