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...
- (fine-grained) volcanic rock, or to any of several types of vitreous igneous rocks. Volcanic gl**** is formed when magma is rapidly cooled. Magma rapidly cooled...
- include ages of less than 360,000 years for rocks in the caldera rim and of less than 240,000 years for volcanic rocks on the flanks. In his 1990 book Volcanoes...
- spanned four geologic epochs. Volcanic eruptions during these magmatic cycles produced a wide variety of volcanic rocks that comprise 13 geological formations...
- crust of a planetary-m**** object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth...
- trachyandesite – Naming system for volcanic rocksPages displaying short descriptions of redirect targets Mugearite – Volcanic rock type Shoshonite – Pot****ium-rich...
- volcanic or volcanic derived (e.g., volcano-sedimentary) rocks, and the deposits are coeval and coincident with the formation of said volcanic rocks....
- Columnar jointing of volcanic rocks exists in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern...
- Bayonnaise Rocks (ベヨネース列岩, Beyonēsu-retsugan) is a group of volcanic rocks in the Philippine Sea about 408 kilometres (254 mi) south of Tokyo and 65 kilometres...