Andesite (/ˈændəzaɪt/) is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich...

Basaltic andesite is a volcanic rock that is intermediate in composition between basalt and andesite. It is composed predominantly of augite and plagioclase...

The andesite line is the most significant regional geologic distinction in the Pacific Ocean basin. It separates the mafic basaltic volcanic rocks of the...

Andesite Vineyard is a Spring Mountain District, Napa Valley vineyard at the 2000-foot level of Spring Mountain, 5 miles up Spring Mountain Road from St...

Andesites is an extinct genus of cephalopod belonging to the Ammonite subclass, from the Late Jurassic. It has only been found in the Mendoza Group of...

The Andesite Mountain Bushveld is a type of sub-tropical woodland ecoregion of Southern Africa. It is part of the Bushveld biome, which straddles the Tropic...

platform of Pumapunku supported as many as eight andesite gateways. The fragments of five andesite gateways with similar characteristics to the Gateway...

The Bearwallow Mountain Andesite or Bearwallow Mountain Formation is a geologic formation exposed in and around the Mogollon Mountains of southwest New...

metamorphic rock, and sedimentary rock. Adakite – Volcanic rock type Andesite – Type of volcanic rock Alkali feldspar granite – Type of igneous rock...

This places basalt in the basalt/andesite field of the QAPF diagram. Basalt is further distinguished from andesite by its silica content of under 52%...

(aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and...

block of andesite with relief textures. Recently it was shown that this stone was used for cold-forming copper. The stone was hewn from an andesite layer...

are convergent plate boundaries often referred to as the andesite line since orogenic andesite is associated with this boundary. This line is often, but...

three series: The tholeiitic series – basaltic andesites and andesites. The calc-alkaline series – andesites. The alkaline series – subgroups of alkaline...

magnesium and iron) volcanic rock like subalkaline basalt and basaltic andesite, it has a volcanic plug occupying its summit cone and numerous dikes. It...

Japan, New Guinea, and New Zealand lie outside the andesite line. Within the closed loop of the andesite line are most of the deep troughs, submerged volcanic...

tholeiite to medium-potassium calc-alkaline basalt, basaltic andesite to shoshonitic basaltic andesite. The Mazama volcanic complex originally formed as a cluster...

types in the calc-alkaline series include volcanic types such as basalt, andesite, dacite, rhyolite, and also their coarser-grained intrusive equivalents...

include tholeiitic basalt, ferro-basalt, tholeiitic basaltic andesite, tholeiitic andesite, dacite and rhyolite. The variety of basalt in the series was...

been erupted from volcanoes which mostly erupt andesite lava, and sillar contains small fragments of andesite. A pink variety of sillar owes its colour to...

majority are of intermediate composition (such as Santiaguito, dacite-andesite, present day) The characteristic dome shape is attributed to high viscosity...

Astrology: The Key To Scientific Prediction, Being The Prognostic Astronomer. Andesite Press [Harvard College Library]. ISBN 978-1-296-83282-7. Smith, Robert...

Department, Colombia. The name is for the Andes due to its abundance in the andesite lavas in those mountains. In the early 2000s, red and green gemstones began...

characteristic mixture of dacite and andesite, while modern lava is very diverse (ranging from olivine basalt to andesite and dacite).: 214  St. Helens started...

active about 20,000/40,000 - 8,000 years before present with basaltic andesite-andesite lava flows. It is part of Chachimbiro. Pilavo is part of the volcanic...

Talahib Andesite rock formation (Avila, 1980). This is seen as being comparable to the Nasugbu Volcanic Complex (MGB, 2005). The Talahib Andesite is visible...

lava types occur: basalt, mafic andesite, two-pyroxene andesite, hornblende-hypersthene andesite, hornblende andesite, hornblende dacite, rhyolite. Catastrophic...

Andesite porphyry from summit of O'Leary Peak. This is an extrusive porphyritic rock, as the pink (and black) phenocrysts are clearly visible, in contrast...

prominent sulfur deposits. The volcanic cones are composed of andesite, basaltic andesite and dacite. The volcano is mantled in ash from the 1912 eruption...

flows. Lavas at the Ring of Fire's stratovolcanoes are mainly andesite and basaltic andesite but dacite, rhyolite, basalt and some other rarer types also...