Definition of Volcanic rocks. Meaning of Volcanic rocks. Synonyms of Volcanic rocks

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Definition of Volcanic rocks

Volcanic rocks
Volcanic Vol*can"ic, a. [Cf. F. volcanique, It. vulcanico.] 1. Of or pertaining to a volcano or volcanoes; as, volcanic heat. 2. Produced by a volcano, or, more generally, by igneous agencies; as, volcanic tufa. 3. Changed or affected by the heat of a volcano. Volcanic bomb, a mass ejected from a volcano, often of molten lava having a rounded form. Volcanic cone, a hill, conical in form, built up of cinders, tufa, or lava, during volcanic eruptions. Volcanic foci, the subterranean centers of volcanic action; the points beneath volcanoes where the causes producing volcanic phenomena are most active. Volcanic glass, the vitreous form of lava, produced by sudden cooling; obsidian. See Obsidian. Volcanic mud, fetid, sulphurous mud discharged by a volcano. Volcanic rocks, rocks which have been produced from the discharges of volcanic matter, as the various kinds of basalt, trachyte, scoria, obsidian, etc., whether compact, scoriaceous, or vitreous.

Meaning of Volcanic rocks from wikipedia

- Volcanic rocks (often shortened to volcanics in scientific contexts) are rocks formed from lava erupted from a volcano. Like all rock types, the concept...
- hypabyssal rocks and they are usually much finer-grained, often resembling volcanic rock. Hypabyssal rocks are less common than plutonic or volcanic rocks and...
- andesite – Volcanic rock that is intermediate in composition between basalt and andesite Basaltic trachyandesite – Naming system for volcanic rocksPages displaying...
- felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon (4 to 2.5 billion years ago). The term "felsic" means that the rocks have...
- Mountain, a local peak that is composed of volcanic rocks from the field. The area also contains the Guffey volcanic eruption center. McIntosh, William C.;...
- metavolcanic rocks, the Brahma and Rama schists are interpreted to consist of metamorphosed, volcanic island-arc and ****ociated submarine volcanic rocks. These...
- consists of igneous rocks (plutonic rocks overlain by volcanic rocks) that were gradually covered by layers of sedimentary rocks. The igneous part of...
- Hong Kong is dominated by igneous rocks (including granitic rocks and volcanic rocks) formed during a major volcanic eruption period in the Mesozoic era...
- presence of dense volcanic rocks beneath the arc. Inactive arcs are a chain of islands which contains older volcanic and volcaniclastic rocks. The curved shape...
- but larimar has a unique volcanic blue coloration, which is the result of copper substitution for calcium. Miocene volcanic rocks, andesites and basalts...