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Home > Explore! > Surficial Geology > Field Localities > Big Rock, Waltham > Figure 5 > Figure 5B




Figure 5B. Closeup of edge of enclave shown in Figure 5A. Note large light gray feldspar grains within the dark gray enclave. These grains became separated from the partially crystallized granite, and mixed into the enclave magma while it was still molten.


Last updated on November 20, 2012