Figure 4-1. Microcrystalline calcite (M) forming a layer on the side of a stalagmite, with sparry calcite (C) within and outside it. Note accumulation of detrital carbonate material in depression (arrow). Photomicrograph was taken in plane-polarized light; field of view is 2.2 mm wide. DeSoto Caverns, Alabama, southeastern U.S.A., Stalagmite 95b-1; thin section 96b-1.
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