ANDESITE Andesite is an extrusive igneous rock consisting primarily of plagioclase feldspars plus pyroxene and/or hornblende. Biotite, magnetite, quartz and sphene are common constituents. Andesite is named after the Andes mountain range. These rocks are found near the subduction zones of ocean tectonic plates, along continental margins. |
See Steve's video interview about asteroid capture at Moonandback: Part 1 Part 2 Part 3 |
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See Steve's blog Ramblings On The Future Of Humanity (recent post) A Project Plan for Space Based Solar Power
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