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Home > Explore! > Bedrock Geology > Field Localities > Porter Point Preserve > Figure 3
Figure 3. Swirled banding in the gneiss and migmatite. Thin layers of migmatite are roughly parallel to the banding in the gneiss. In the lower portion of the image, a pegmatite dike about ½ meter thick cuts across the gneiss and migmatite.
Last updated on June 15, 2008
