collapse breccia

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• collapse breccia —    A mass of rock composed of angular to rounded fragments of limestone or dolomite that has formed as the result of the collapse of the roof of a cave, of an underlying cave, or of an overhanging ledge [10].    See also solution breccia …   Lexicon of Cave and Karst Terminology

• collapse breccia — noun : a breccia formed by the collapse of rock overlying an opening …   Useful english dictionary

• Breccia — (pronEng|ˈbrɛtʃiə, ˈbrɛʃiə, it. breach) is a rock composed of angular fragments of several minerals or rocks in a matrix, that is a cementing material, that may be similar or different in composition to the fragments. A breccia may have a variety …   Wikipedia

• breccia — /brech ee euh, bresh /, n. Petrol. rock composed of angular fragments of older rocks melded together. [1765 75; < It < Gmc; cf. OHG brecha breaking] * * * Coarse sedimentary rock consisting of angular or nearly angular fragments larger than 0. 08 …   Universalium

• Arizona breccia pipe uranium mineralization — During the late 1970s and through the 1980s, Mohave and Coconino County, Arizona, immediately north and south of the Grand Canyon and west of the Navajo Indian Reservation were explored for Arizona breccia pipe uranium mineralization. The search… …   Wikipedia

• karst breccia —    See collapse breccia; solution breccia …   Lexicon of Cave and Karst Terminology

• solution breccia —    A mass of rock composed of angular to rounded fragments of rock that have accumulated by solution of surrounding or underlying carbonate.    See also collapse breccia …   Lexicon of Cave and Karst Terminology

• Fault breccia — (IPA: /ˈbrɛtʃiə, ˈbrɛʃ /, Italian: breach), or tectonic breccia is a breccia (a rock type consisting of angular clasts) that was formed by tectonic forces. Fault breccia has no cohesion, it is normally an unconsolidated rock type, unless… …   Wikipedia

• Impact crater — The prominent impact crater Tycho on the Moon. In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body. In most common usage,… …   Wikipedia

• Uranium mining in Arizona — has taken place since 1918. Prior to the uranium boom of the late 1940s, uranium in Arizona was a byproduct of vanadium mining of the mineral carnotite.Carrizo MountainsUranium mining started in 1918 in the Carrizo Mountains, as a byproduct of… …   Wikipedia

• Uranlagerstätte — Uranlagerstätten sind natürliche Anreicherungen von Uran, aus denen sich das Element wirtschaftlich gewinnen lässt. Inhaltsverzeichnis 1 Grundlagen 1.1 Geochemie des Urans 1.2 Mineralogie 2 …   Deutsch Wikipedia