LAMPROPHYRES Lamprophyres is a plutonic igneous rock with an ultrapotassic mafic composition, largely amphibole or biotite with some feldspars (but not as large crystals). They are dark and dense. |
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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