detrital

adjective

relating to particles of rock that have been broken down from pre-existing rocks by erosion and weathering

Wiktionary

Pronunciation: /diˈtɹaɪtəl/

adj

Etymology: Etymology tree English detritus Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English detrital From detritus + -al.

Consisting of, or pertaining to, geological detritus.
“The light-chestnut soils are much more detrital than the chestnut varieties — not only at the surface but throughout the soil strata, except on sandy tracts.”