900,662,403 visitors served.
900,662,403 visitors served. |
|
 Dictionary/ thesaurus |  Medical dictionary |  Legal dictionary |  Financial dictionary |  Acronyms |  Idioms |  Encyclopedia |  Wikipedia encyclopedia | ? |
andesite |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia | 0.02 sec. |
andesiteVolcanic igneous rock, intermediate in silica content between rhyolite and basalt. It is characterized by a large quantity of feldspar minerals, giving it a light colour. Andesite erupts from volcanoes at destructive plate margins (where one plate of the Earth's surface moves beneath another; see plate tectonics), including the Andes, from which it gets its name. |
|
? Mentioned in | ? References in periodicals archive | |
|---|---|---|
However, the rover's study of a Martian rock called Barnacle
Bill indicates that it resembles andesite, a volcanic rock often formed
by several cycles of heating and cooling, although not as many as
granite. TOC 06-44 was drilled along the same cross section as drill hole
TOC 06-43, but aimed in the opposite direction, to probe the width of
the capping andesite and to define the eastern limit of shallow gold
mineralization just beyond the andesite. The Main
San Jacinto vein, ranges in width from two to over 20 meters, is
composed dominantly of vein breccia, probably of hydrothermal origin,
with a fine-grained quartz-chalcedony matrix containing up to 20%
silicified andesite and vein fragments. |
 |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content NEW! | Linking | Lookup box | Double-click lookup | Partner with us |
|
|---|
Disclaimer |
Privacy policy |
Feedback | Copyright © 2008 Farlex, Inc.
Printer friendly
Cite / link
Email
Feedback
andesite
