clastic mineral
41Schist — The schists constitute a group of medium grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn out grains to such an… …
42Paleomagnetism — is the study of the record of the Earth s magnetic field preserved in various magnetic minerals through time. The study of paleomagnetism has demonstrated that the Earth s magnetic field varies substantially in both orientation and intensity… …
43cement — cementable, adj. cementer, n. cementless, adj. /si ment /, n. 1. any of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material. 2. any of various… …
44Sandstone — is a sedimentary rock composed mainly of sand size mineral or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth s crust. Like sand, sandstone may be any color, but the most… …
45Coal measure — The Coal Measures is a lithostratigraphical term used mainly in the British Isles for the coal bearing part of the Upper Carboniferous System. It represents the remains of fluvio deltaic sediment, and consists mainly of clastic rocks (claystones …
46Geology of the Death Valley area — The exposed geology of the Death Valley area presents a diverse and complex story that includes at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related… …
47Henrietta Island — Infobox Islands name = Henrietta Island | image caption = Henrietta (Остров Генриетты) is the northernmost island of the De Long group area = 12 km² highest mount = unnamed elevation = convert|315|m|ft|0|abbr=on|lk=on location = Arctic Ocean… …
48Geology of Alderley Edge — Infobox Mountain Name = Alderley Edge Photo = Stormy Point 1993.jpg Caption = Stormy Point Elevation = 183 m (600 ft) Location = Cheshire, ENG Range = Prominence = Coordinates = Topographic OS Landranger 118 Grid ref UK = SJ870760 Grid ref… …
49Geology of the Iberian Peninsula — The geology of the Iberian Peninsula consists of the study of the rock formations on the Iberian Peninsula, which includes Spain, Portugal, Andorra, and Gibraltar. The peninsula contains rocks from every age from Ediacaran to Recent, and almost… …
50Coal Measures — British coalfields in the nineteenth century. The Coal Measures is a lithostratigraphical term for the coal bearing part of the Upper Carboniferous System. It represents the remains of fluvio deltaic sediment, and consists mainly of clastic rocks …
