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�00 <br /> "TWINING <br /> CONCRETE INSIGHT <br /> Morrison Quarry Rock Petrography Page 38 <br /> 1• <br /> (a) <br /> WA� <br /> •rat <br /> t � <br /> (b) .. <br /> Figure 4.5c. Sample HDR-003 (284-284.5). (a)Photograph showing detail of the polished surface. Scale shows <br /> millimeter increments. (b) Reflected light photomicrograph showing detail of the polished surface. Red <br /> arrows indicate interlocking quartz grains. Blue arrow indicate biotite grains. Green arrows indicate chlorite <br /> and/or serpentine. Note that the yellow-green discoloration of the polished surface indicates locations where <br /> epoxy(applied for sample stabilization in the petrographic laboratory)has penetrated the sample. <br /> Report No. 227893.d 22 November 2022 <br />