gravity prospecting
41Mining methods of the Klondike Gold Rush — See also: Klondike Gold Rush, Mining Contents 1 During the Klondike Gold Rush (1896 1910) 1.1 Methods of bringing out the gold 1.1.1 Underground mining …
42eötvös unit — noun Usage: usually capitalized E : a unit for expressing horizontal gradients of gravity (as in geophysical prospecting) equal to 10 9 gal per horizontal centimeter * * * a unit of measure of horizontal gradients of gravity, equal to one… …
43METALS AND MINING — In the Bible Six metals are mentioned in the Bible and in many passages they are listed in the same order: gold, silver, copper, iron, tin, and lead. Antimony is also mentioned. The metals are referred to in various contexts, including methods of …
44Beryl — Beril redirects here. For a character of Tolkien s legendarium, see Beril (House of Bëor). Heliodor redirects here. For the masculine name, see Heliodorus (disambiguation). For other uses, see Beryl (disambiguation). Beryl Three varieties of… …
45Meteorite — This article is about debris from space that survives impact with the ground. For other uses of Meteor and Meteors , see Meteor (disambiguation). For popular applications, see Falling star. For the fictional superhero in the Marvel Comics… …
46Garnet — For other uses, see Garnet (disambiguation). Garnet General Category Nesosilicate Chemical …
47Earth's magnetic field — Computer simulation of the Earth s field in a normal period between reversals.[1] The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and… …
48Tom Strong — Superherobox caption=Tom Strong and his daughter Tesla. From the cover of Tom Strong #29 by Chris Sprouse. comic color=background:#8080ff character name=Tom Strong real name=Tom Strong publisher=America s Best Comics debut= Tom Strong #1 (1999)… …
49Red beryl — Infobox mineral name = Red beryl category = Mineral (cyclosilicate) boxwidth = 175 boxbgcolor = caption = formula = Be3(AlMn)2Si6O18 color = Orange red to red to purple red habit = Elongate or tabular first order prisms. system = Hexagonal… …
50Antonov An-2 — An 2R on skis allowing for operations in the snow Role Agricultural …
