clastic limestone
51Lutite — is any sedimentary clastic rock with clay or silt grain size less than 1/16 mm (0.06 mm or 0.00256 in). [ [http://concise.britannica.com/ebc/article 9370752/lutite Britannica definition of lutite ] . Accessed on December 31, 2007] The term is… …
52Rudite — is any sedimentary clastic rock with a grain size exceeding 2 mm (0.08 in) [ [http://www.outreach.canterbury.ac.nz/resources/geology/page11.shtml Definition of rudite ] Accessed on January 1, 2008] such as conglomerates and breccias.The term is… …
53Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …
54Metamorphic rock — Metamorphic redirects here. For other uses, see Metamorphic (disambiguation). Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. Metamorphic rock is the transformation of an existing rock type,… …
55Geology of North America — The geology of North America, like most topics of scientific study, is undergoing progressive investigation by numerous public and private sector earth scientists, academicians, and students. In that regard, the detailed picture is subject to… …
56Geology of the Canyonlands area — The exposed geology of the Canyonlands area is complex and diverse; 12 formations are exposed in Canyonlands National Park that range in age from Pennsylvanian to Cretaceous. The oldest and perhaps most interesting was created from evaporites… …
57Dunham classification — The Dunham classification system for carbonate sedimentary rocks was devised by Robert J. Dunham in 1964, and refined by Embry and Klovan in 1971 to include sediments that were organically bound during deposition. Contents 1 History 2 Dunham… …
58Carbonate hosted lead zinc ore deposits — World wide distribution of MVT deposits, (red), clastic sediment hosted (green), and unclassified (blue) lead zinc deposits. Source: USGS Carbonate hosted lead zinc ore deposits are important and highly valuable concentrations of lead and zinc… …
59Maquoketa Group — Paleozoic Stratigraphy of the Upper Midwest, USA Dates are approximate, and deposition occurred at slightly different times in different areas This box: view · talk · …
60Rocky Mountains — the chief mountain system in North America, extending from central New Mexico to N Alaska. Highest peak, Mount McKinley, 20,300 ft. (6187 m). Also called Rockies. * * * or Rockies Mountain system, western North America. It extends some 3,000 mi… …
