volcaniclastic
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volcaniclastic — ALASKA VOLCANO OBSERVATORY GLOSSARY A volcanic rock or unconsolidated deposit composed of pre existing fragments, particles or clasts of volcanic origin. GLOSSARY OF VOLCANIC TERMS A non genetic term used to describe any fragmental aggregate of… … Glossary of volcanic terms
volcaniclastic — /vol kan i klas tik/, adj. Geol. pyroclastic. Also, volcanoclastic /vol kan euh klas tik/. [1960 65; b. VOLCANIC and CLASTIC] * * * … Universalium
volcaniclastic — (adjective) Pertaining to the entire spectrum of fragmental materials with a preponderance of clasts of volcanic origin. The term includes not only pyroclastic materials but also epiclastic deposits derived from volcanic source areas by… … Glossary of landform and geologic terms
volcaniclastic — /vol kan i klas tik/, adj. Geol. pyroclastic. Also, volcanoclastic /vol kan euh klas tik/. [1960 65; b. VOLCANIC and CLASTIC] … Useful english dictionary
Slave craton — which is one of the oldest dated rock units on Earth at 4.03 Ga. The crust of the Slave craton is thought to have amalgamated during a 2.69 Ga collision between a proto Slave western basement complex, known as the Central Slave Basement Complex,… … Wikipedia
Canóvanas, Puerto Rico — Infobox Settlement settlement type = subdivision type = Country subdivision name = United States subdivision type1 = Territory subdivision name1 = Puerto Rico subdivision type2 = subdivision name2 = timezone=AST utc offset= 4 timezone DST= utc… … Wikipedia
Geology of the Falkland Islands — The geology of the Falkland Islands has its origins in events of more than 400 million years bp, before the Falkland Islands existed as separate entities, with the appearance of intruded dikes in the crust of the supercontinent Gondwana. The… … Wikipedia
Wenlock Series lagerstätte — The Silurian lagerstätte preserved in the limestone Wenlock Series of Herefordshire, England, offers paleontologists a rare snapshot of a moment in time, about 420 Mya. In the formation, layers of fine grained volcanic ash punctuate a sequence of … Wikipedia
Back River volcanic complex — The Back River volcanic complex is an Archean stratovolcano, located km to mi|num=480|abbr=no|spell=Commonwealth|precision=0|wiki=yes northwest of Yellowknife, Northwest Territories, Canada. The volcano constitutes the Back Group of the… … Wikipedia
Izu-Bonin-Mariana Arc — The Izu Bonin Mariana (IBM) arc system is an outstanding example of a plate tectonic convergent boundary. IBM extends over 2800 km south from near Tokyo, Japan, to beyond Guam, and includes the Izu Islands. Bonin Islands, and Mariana Islands;… … Wikipedia
