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Skinner Gulch Limestone the granite, we cannot say whether the granite is
younger or older than the Leet Junction Formation. Nor, as mentioned earlier,
can we determine whether the granite formed before, during, or after the tilting of
These range in size from small bodies filling cracks to huge volumes of granite.
Granite is a coarse-grained rock composed predominantly of feldspar and quartz.
It is the chemical and mineralogical equivalent of rhyolite. Granite is the most ...
Strictly speaking, a pegmatite can be of diorite, gabbro, or granite. However, the
vast majority of pegmatites are felsic, with very large crystals of potassium
feldspar, sodium-rich plagio- clase feldspars, and quartz. Hence the term
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Introduction to Physical Geology
Terms to Remember 382
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