In the bottom of death valley, you will find layers of gravel deposited by rivers. based on materials presented in class, what is a likely explanation for this occurrence of river gravels in the valley bottom?

In the bottom of death valley, you will find layers of gravel deposited by rivers. based on materials presented in class, the explanation for this occurrence of river gravels in the valley bottom is that the valley was dropped relative to the mountains by faulting, and rivers now are carrying gravels down from the mountains into the valley and depositing the gravels at the valley bottom.