These women were called concubines, and they often were treated better than the manâs wife. The word concubine comes from the Latin verb, cubare, which means to lie down. The word developed in Middle English in the 13th Century, and is another name for a woman taken as a mistress. The practice was common throughout history: the Bible includes many references to concubines, and in ancient China, a ruler might have had thousands of concubines, some treated well, some like prostitutes.
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.The material is then transported from the source area to the deposition area. The type of sediment transported depends on the geology of the hinterland (the source area of the sediment).he sedimentary rock cover of the continents of the Earth's crust is extensive, but the total contribution of sedimentary rocks is estimated to be only 8% of the total volume of the crust. Sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks.
Sediment is any material deposited on the earth's surface that is derived from rocks by weathering. The products of weathering include rock fragments (detritus), new minerals, such as kaolinite and hematite, and dissolved ions, which may later precipitate from water.. Detrital sedimentary rocks: These rocks are composed of mineral grains and/or rock fragments transported and deposited by some geologic agent. Detrital rocks are typically composed of mineral grains derived from silicate rocks.