Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
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 — Synonyms and related words: aa, abyssal rock, agglomerate, agglomeration, basalt, bedrock, block lava, brash, bunch, clot, cluster, concrete, concretion, conglomerate, conglomeration, crag, debris, detritus, druid stone, festooned pahoehoe,… … Moby Thesaurus
Isua greenstone belt — The Isua greenstone belt is an Archean greenstone belt in southwestern Greenland dated at 3.8 3.7 Ga and contains the oldest known, well preserved, metavolcanic (metamorphosed mafic volcanic), metasedimentary and sedimentary rocks on Earth. It… … Wikipedia
Subglacial volcano — A subglacial volcano is a volcanic form produced by subglacial eruptions or eruptions beneath the surface of a glacier or ice sheet which is then melted into a lake by the rising lava. Today they are most common in Iceland and Antarctica; older… … Wikipedia
Sturgeon Lake Caldera — Infobox Mountain Name=Sturgeon Lake Caldera Photo= Caption= Elevation= approx. Unit m|455|0 Location=Ontario, Canada Range= Prominence = Coordinates = coord|49|52|13|N|91|00|10|W|type:mountain region:CA Topographic Type=Caldera Volcanic… … Wikipedia
Karmutsen Formation — The Karmutsen Formation is a Late Triassic volcanic sequence of tholeiitic pillow basalts and breccias on Vancouver Island, British Columbia, Canada. It is perhaps the thickest accreted section of an oceanic plateau worldwide, exposing up to 6000 … Wikipedia
Geology of the Pacific Northwest — The geology of the Pacific Northwest refers to the study of the composition (including rock, minerals, and soils), structure, physical properties and the processes that shape the Pacific Northwest region of the United States and Canada. The… … Wikipedia
Chilcotin Plateau Basalts — The Chilcotin Plateau Basalts, also called the Chilcotin Group, is a medium sized large igneous province that forms a volcanic plateau running parallel with the Garibaldi Volcanic Belt in south central British Columbia, Canada.During Late… … Wikipedia
Basalt — For the World War II raid, see Operation Basalt. For the cities, see Basalt, Colorado and Basalt, Idaho. Basalt Igneous Rock Composition … Wikipedia
Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… … Wikipedia
