In geology, there is an axiom that all rocks exposed at the earth's surface, igneous, metamorphic, and sedimentary, slowly break down due to processes such as weathering, erosion, and abrasion due to ice, to form sand, silt, and clay;
(all rocks; exposed; L:at the earth's surface) (all rocks exposed at the earth's surface; slowly break down; due to processes such as weathering, erosion, and abrasion due to ice)
all rocks all rocks exposed at the earth's surface
exposed slowly break down
L:at the earth's surface
due to processes such as weathering, erosion, and abrasion due to ice