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  • Spatial Coverage is exactly "Concord Quad, On Highway 202, 1 mile E of the West edge of the Quad."

2013-10-08 18.35.40.jpg
Spotted Spaulding Granite, member of the Spaulding Quartz Diorite. Part of an irregular sill, not the major facies. Spotted appearance, extends through more mafic facies. Thin section contains quartz, alkali feldspar, plagioclase, mica, and…
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