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Figure 1b

Figure 1b:

Chart for estimating the percentage of abundant mineral, fossil, or rock grains in a rock.
Figure 1c

Figure 1a, B:

Charts for estimating the percentage of grains comprising 25% or less of a rock.
both figures from Raymond, L. A., 1984, Petrography Laboratory Manual, vol. 1: Hand specimen Petrography. Geology Services International, NC, 170 p.
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