Dacite

Dacite ( /ˈdeɪsaɪt/) is an igneous, volcanic rock. It has an aphanitic to porphyritic texture and is intermediate in composition between andesite and rhyolite. The relative proportions of feldspars and quartz in dacite, and in many other volcanic rocks, are illustrated in the QAPF diagram. Dacite is also defined by silica and alkali contents in the TAS classification.

The word dacite comes from Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania) where the rock was first described.

Read more about Dacite:  Composition, Texture, Geological Context and Formation

Other articles related to "dacite":

Geology Of The Lassen Volcanic Area - Volcanoes Rise and Fall in The Park Area - Mount Tehama and Pre-Lassen Volcanics
... this possible collapse may have been the release of the extensive amounts of lava that formed the dacite domes on its flank ... was forced through the north flank of Sifford Mountain and a plug of dacite was pushed up through the west flank of Raker Peak ... (silica content between basalt and dacite) lava flows ...
Mount Boucherie - Geology
... The more prominent black and dark gray east and north-east face is dacite ... Boucherie's volcanic period, as evidenced by the fact that the dacite columns intersect older rhyolite and andesite volcanic rock ... east cliff face is composed of folded volcanic flows of dacite ...
Casey, Australian Capital Territory - Geology
... the hill tops the rock is from the Hawkins Volcanics, with mostly dacite in the south, and andesite in the north ... The north east of the suburb has dacite from the Canberra Formation ... The south east has a green grey porphyry with a dacite like composition, and visible white feldspar crystals ...
Geological Context and Formation - Molten Dacite Magma At Kīlauea
... Dacite magma was encountered in a drillhole during geothermal exploration on Kīlauea in 2005 ... The dacite magma is a residual melt of the typical basalt magma of Kīlauea ...
Examples of Lava Domes
... Peak California, USA Cascade Volcanic Arc Dacite 1917 Mount Meager British Columbia, Canada Cascade Volcanic Arc Dacite 2350 BP Mount Merapi Indonesia Sunda Arc Nea Kameni Greece Volcán Nuevo. 5760 BC Santiaguito Guatemala Central America Volcanic Arc Dacite 2009 Sollipulli Chile Southern Volcanic Zone Andesite to Dacite Soufrière Hills Montserrat Lesser Antilles 2009 Mount St ... Helens Washington, USA Cascade Volcanic Arc Dacite 2008 Torfajökull Iceland Iceland hotspot Rhyolite Tata Sabaya Bolivia Andes Ignimbrite Unknown Tate-iwa Japan Japan Arc Dacite Miocene Wizard Island Oregon, USA ...