Figure 2-5. Very large botryoid of aragonite (A) in a stalagmite from China. Botryoid is 7.5 mm across. Undercutting of aragonite at red arrows and presence of calcite in outer right of botryoid (c) suggests that some aragonite has been replaced by calcite.    Image is a mosaic of six photomicrographs taken in plane -polarized light; field of view is 9.5 mm wide; letters partly visible at far left are part of a reference grid for systematic study of the sample. Yangzhipo Cave, Guizhou, China; thin section CH1. Sample collected by Dr. Hong-lin Xiao.
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