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Volcano > Andesite
The following information is about Andesite.
Andesite Defined
Andesite is a gray to black volcanic rock with between about 52 and 63 weight percent silica (SiO2). Andesites contain crystals composed primarily of plagioclase feldspar and one or more of the minerals pyroxene (clinopyroxene and orthopyroxene) and lesser amounts of hornblende. At the lower end of the silica range, andesite lava may also contain olivine. Andesite magma commonly erupts from stratovolcanoes as thick lava flows, some reaching several kilometers in length. Andesite magma can also generate strong explosive eruptions to form pyroclastic flows and surges and enormous eruption columns. Andesites erupt at temperatures between 900 and 1100° C. (USGS/VHP)
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Off-site Andesite Links, User Submitted
The following links have been collected through user bookmark submission in the Andesite category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
Wed Dec 24
- Piedras de Ica, operaciones quirurgicas: Al sur de Lima, Perú, en la región de Ocucaje, quedaron al descubierto muchas piedras labradas como las del vídeo donde se muestran animales prehistóricos, animales extintos, extraños artefactos, operaciones quirúrgicas etc. Museo de las piedras del Doctor Cabrera. Dirección: Plaza de Armas
- YouTube - Hubo una humanidad anterior: Piedras descubiertas en Perú con misteriosos grabados en ellas, muy similares a las figuras del "cosmódro mo" de Nazca.Museo Cabrera. Piedras de Ica, PERU
Mon Jun 2
- Untitled Document: Whereas basalt forms a'a and pahoehoe surface forms, andesite generally produces blocky lava. Here, the surface contains smooth-sided, angular fragments (blocks) that are not as splintery or vesicular as a'a lava fragments.
- Mount Cayley - Wikipedia, the free encyclopedia: Mount Cayley is a potentially active[1] stratovolcano in the Squamish-Lillo oet Regional District, British Columbia located 11 kilometres (7 mi) southwest of Callaghan Lake and 24 kilometres (15 mi) west of Whistler, British Columbia, Canada.
- Orogenic Andesites: The Orogenic Andesite Series ( or Calc-Alkaline Series) includes lavas with composition ranging from basalt through basaltic andesite to dacite and rhyolite.
- Image of Ruapehu, New Zealand: Ruapehu, the tallest mountain on the North Island, is a massive andesite stratovolcano.
- USGS Photo Glossary: Andesite: Andesite is a gray to black volcanic rock with between about 52 and 63 weight percent silica (SiO2). Andesites contain crystals composed primarily of plagioclase feldspar and one or more of the minerals pyroxene (clinopyroxene and orthopyroxene) and lesse
Mon Mar 5
Sat Oct 14
If you would like to find additional social bookmark based links on the topic of we recommend the Open Tag Directory > Andesite. If you would like to find related tags we recommend Tag Patterns > Andesite
Off-site Andesite Research Links
If you still need additional information on Andesite then we suggest the following off-site resources. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
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