calcrete
11Uranium mining — The Ranger Uranium Mine in Australia …
12Caliche — Forest on San Miguel Island. Caliche is a sedimentary rock, a hardened deposit of calcium carbonate. This calcium carbonate cements together other materials, including gravel, sand, clay, and silt. It is found in aridisol and mollisol soil orders …
13Mynydd Llangorse — is a hill on the western edge of the Black Mountains in the Brecon Beacons National Park in Powys, south Wales. It lies two miles east of Llangors and its lake and 5 miles south of Talgarth. Its summit at 515m overtops the location 600m to the… …
14Old Red Sandstone — Stratigraphic range: Late Silurian to earliest Carboniferous Cross section showing quartz and chert pebbles in a sample from central England (scale bar is 10 mm). Type Geological formation …
15Ultramafic rock — Ultramafic (also referred to as ultrabasic) rocks are igneous and meta igneous rocks with very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals (dark… …
16Ganister — As defined in Jackson (1997), a ganister is hard, fine grained quartzose sandstone, or orthoquartzite, used in the manufacture of silica brick typically used to line furnaces. Ganisters are cemented with secondary silica and typically have a… …
17Caliche (mineral) — Caliche is a hardened deposit of calcium carbonate. This calcium carbonate cements together other materials, including gravel, sand, clay, and silt. It is found in aridisol and mollisol soil orders. Caliche occurs worldwide, generally in arid or… …
18Seatearth — is a British coal mining term, which is used in the geological literature. As noted by Jackson (1997), a seatearth is the layer of sedimentary rock underlying a coal seam. Seatearths have also been called seat earth , seat rock , or seat stone in …
19Blombos Cave — has been recovered at the site and dates to c. 140,000 years ago.The symbolic significance of these finds suggests Middle Stone Age people were behaving in a cognitively modern way and had the advantages of syntactical language at least 80,000… …
20Stygofauna — are any fauna that live within groundwater systems, such as caves and aquifers, or more specifically small, aquatic groundwater invertebrates, though terrestrial air breathing subterranean animals are also sometimes included. Stygofauna can live… …
