water-bearing deposit
71petroleum production — Introduction recovery of crude oil and, often, associated natural gas from the Earth. petroleum is a naturally occurring hydrocarbon material that is believed to have formed in deep sedimentary (sedimentary rock) beds from animal and …
72Mudrock — Glacial Lake Missoula claystone Red mudrock in the Ragged Reef Formation ( …
73Nuclear fuel cycle — The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the front end, which are the preparation of the fuel, steps in the service period in which… …
74Colombia — Colombian, adj., n. /keuh lum bee euh/; Sp. /kaw lawm byah/, n. a republic in NW South America. 37,418,290; 439,828 sq. mi. (1,139,155 sq. km). Cap.: Bogotá. * * * Colombia Introduction Colombia Background: Colombia was one of the three countries …
75gastropod — /gas treuh pod /, n. 1. any mollusk of the class Gastropoda, comprising the snails, whelks, slugs, etc. adj. 2. Also, gastropodous /ga strop euh deuhs/. belonging or pertaining to the gastropods. [1820 30; < NL Gast(e)ropoda a class of mollusks.… …
76Centipede — For other uses, see Centipede (disambiguation). Centipedes Temporal range: 418–0 Ma …
77Zhoukoudian — Peking Man Site at Zhoukoudian * UNESCO World Heritage Site Country …
78Codelco — Type Government owned Industry Mining Founded (1955) Headquarters …
79Geology 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… …
80Hushing — is an ancient mining method using a flood or torrent of water to reveal mineral veins. [cite web url=http://www.durham miner.org.uk/miner/projects.nsf/581cd74a9c6aa8b080256d48003758cb/6c0a47fe223b390880256e82004577a2?OpenDocument title=Durham… …
