Well visiting the grand canyon you observe the exposed layers of rock on the bounty what natural process most likely caused the valley to form do you deposition ,chemical weathering ,oxidation ,erosion

Erosion is the answer. It's probable that the natural process of erosion caused the exposed layers of rocks.

erosion

Explanation:

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

i'd say that the moon rock is about 2.2 billion years old.