Part a what are cross beds? what are cross beds?
a) inclined layers in sediment or sedimentary rocks that reveal the direction of wave or wind transport inclined layers in sediment or sedimentary rocks that reveal the direction of wave transport
b) inclined layers in sediment or sedimentary rocks that reveal the direction of wind transport inclined layers in sedimentary rocks that reveal the direction of wave or wind transport
c) inclined layers in sedimentary rocks that reveal the direction of wave transport

Inclined layers in sediment or sedimentary rocks that reveal the direction of wave or wind transport

Explanation:

In geology, cross-bedding or cross-beds refer to sets of beds that are inclined relative to one another (they are at an angle compared to the main bedding plane).  

The beds are inclined in the direction that the wind or water was moving at the time of deposition. Therefore, these ripples indicate that there was water of wind in the environment when they were formed.

They are very common in beach deposits, sand dunes, and river deposited sediment.  

Thus, the correct answer is "Inclined layers in sediment or sedimentary rocks that reveal the direction of wave or wind transport"

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a)apline.     glad to ! : )