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Volcano > Dacite
The following information is about Dacite.
Dacite Defined
Dacite lava is most often light gray, but can be dark gray to black. Dacite lava consists of about 63 to 68 percent silica (SiO2). Common minerals include plagioclase feldspar, pyroxene, and amphibole. Dacite generally erupts at temperatures between 800 and 1000° C. It is one of the most common rock types associated with enormous Plinian-style eruptions. When relatively gas-poor dacite erupts onto a volcano's surface, it typically forms thick rounded lava flow in the shape of a dome. (USGS/VHP)
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Off-site Dacite Links, User Submitted
The following links have been collected through user bookmark submission in the Dacite category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
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.
Wed Nov 21
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