Question

Detrital rocks are ____.

Answer 1

Detrital (or clastic) sedimentary rocks are the most common rocks exposed at Earth's surface. They form as sediment grains (detritus or clasts), weathered and eroded from pre-existing rocks, are deposited as layers in low-lying areas such as valleys, lakes, or an ocean basin. With continued deposition, sediment grains become compacted tightly together. As groundwater slowly percolates through open spaces (pores) within the sediment, minerals will precipitate onto the surfaces of the grains forming a natural cement. Detrital sedimentary rocks can have distinctive colors derived from the minerals they contain, and they can weather into unusual shapes depending on the degree of cementation and composition of individual layers of rocks.

Answer 2

A clastic sedimentary rock.