earth and stones; soil and rocks
Refers to a mixture of earth, soil, sand, and stones, often in the context of natural disasters (landslides, debris flows) or construction materials.
豪雨で土石流が発生した。
Heavy rain caused a debris flow.
The earth and rocks on the mountainside collapsed due to the heavy rain.
工事現場から大量の土石が運び出された。
A large amount of earth and stones was carried away from the construction site.
The workers removed the earth and rocks blocking the road.
debris flow; mudslide; landslide
magnesite
Compound of 土 (do, 'earth, soil') and 石 (seki, 'stone'). The reading is on'yomi, as expected for a Sino-Japanese compound.