sedimentary

Relating to or formed by the deposition of sediment — rock formed from compressed layers of sand, mud, shells, or other accumulated material.

• sediment/ˈsɛdɪmənt/(n)沉积物
• sedimentation(n)沉积作用

• sedimentary rock
• sedimentary layer
• sedimentary basin
• sedimentary deposit
• sedimentary process

1. 1.Limestone, sandstone, and shale are all sedimentary rocks — formed over millions of years as layers of material were compressed and cemented together. (geological rock type)
2. 2.Fossils are almost exclusively found in sedimentary rock, because the gradual burial process preserves organisms before they fully decompose. (fossil preservation)

• stratified/ˈstrætɪfaɪd/— arranged in layers
• clastic— formed from fragments of pre-existing rocks

from Latin "sedimentum" (settling) — from "sedere" (to sit, to settle) — rock that settled into place