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basic rock

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basic rock

Igneous rock with relatively low silica contents of 45–52% by weight, such as gabbro and basalt. Along with the terms acid rock and ultrabasic rock it is part of an outdated classification system based on the erroneous belief that silicon in rocks is in the form of silicic acid. Geologists today are more likely to use the descriptive term mafic rock or report the amount of SiO2 in percentage by weight.



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Branco: This time we just wanted to do a basic rock set.
Phoenix by Duncan, Jody / Thrasher
The course, which consists of 10 night classes and four weekend outings, explores hiking, backpacking, mountain travel, map and compass navigation, first aid, food planning, basic rock climbing, snow travel and winter camping.
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Hole 97-3 showed a small anomaly at the base of the hole which may reflect a source at some distance to the north, an area of the property where prospecting has identified surface showings of copper-nickel mineralization in VBE-1's most basic rock types.
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