igneous concentration
81nickel — /nik euhl/, n., v., nickeled, nickeling or (esp. Brit.) nickelled, nickelling, adj. n. 1. Chem. a hard, silvery white, ductile and malleable metallic element, allied to iron and cobalt, not readily oxidized: used chiefly in alloys, in… …
82Structural geology — is the study of the three dimensional distribution of rock bodies and their planar or folded surfaces, and their internal fabrics . Structural geology includes features of and overlaps with facets of geomorphology, metamorphism and geotechnical… …
83Texas — This article is about the U.S. state. For other uses, see Texas (disambiguation). State of Texas …
84Rubidium-strontium dating — The rubidium strontium dating method is a radiometric dating technique that geologists use to determine the age of rocks.Development of this process was aided by Fritz Strassmann, who later moved onto discovering nuclear fission with Otto Hahn… …
85Trace element — In analytical chemistry, a trace element is an element in a sample that has an average concentration of less than 100 parts per million measured in atomic count, or less than 100 micrograms per gram. In biochemistry, a trace element is a chemical …
86Tektite — Tektites (from Greek tektos , molten) are natural glass objects up to a few centimeters in size, which most scientists argue were formed by the impact of large meteorites on Earth s surface. Tektites are typically black or olive green, and their… …
87Dal Lake — For the lake in Kangra district (Himachal Pradesh), see Dal Lake (Himachal Pradesh). Dal Lake डल झील Dal Lake and the shikaras Location Srinagar …
88Geology of the Moon — The geology of the Moon (sometimes called selenology, although the latter term can refer more generally to lunar science ) is quite different from that of the Earth. The Moon lacks a significant atmosphere and any bodies of water, which… …
89Connecticut — /keuh net i keuht/, n. 1. a state in the NE United States. 3,107,576; 5009 sq. mi. (12,975 sq. km). Cap.: Hartford. Abbr.: Conn., Ct., CT (for use with zip code). 2. a river flowing S from N New Hampshire along the boundary between New Hampshire… …
90Malaysia — /meuh lay zheuh, sheuh/, n. 1. a constitutional monarchy in SE Asia: a federation, comprising the former British territories of Malaya, Sabah, and Sarawak: member of the Commonwealth of Nations. 20,376,235; 126,310 sq. mi. (327,143 sq. km). Cap …
