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Intrusive Igneous Rocks |
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Intrusive Igneous Rocks |
A medium-grained granite from the Llano Uplift (color, 441Kb) quartz is red, plagioclase is blue, K-spar is maroon, biotite is black. Sample courtesy of D. Barker.
Another image from the same medium-grained granite (color, 441Kb) quartz is red, feldspar is blue.
An image showing a luminescence halo around an inclusion in quartz from another Llano granite (color, 107Kb).