Sedimentary rocks are classified according to their manner of origin into mechanical or chemical sedimentary rocks. Mechanical rocks, or fragmental rocks, are composed of mineral particles produced by the mechanical disintegration of other rocks and transported, without chemical deterioration, by flowing water. They are carried into larger bodies of water, where they are deposited in layers. Shale and sandstone are common sedimentary rocks of mechanical origin.
- sedimentary rock [sediˈmentəri - rɔk] n. 沉积岩
- manner [ˈmænə] n. 样式
- fragmental [fræɡˈmentəl] adj. 碎屑状的
- mineral [ˈminərəl] n. 矿物，矿石
- particle [ˈpɑ:tikl] n. 颗粒
- disintegration [disˌɪntiˈɡreiʃən] n. 分裂，崩解
- deterioration [diˌtiəriəˈreiʃən] n. 磨损，腐化，变质
- deposit [diˈpɔzit] v. 沉积，沉淀
- layer [ˈleiə] n. 地层
- shale [ʃeil] n.页岩
- sandstone [ˈsændstəun] n.砂岩
