Figure 1-11. SEM image of equant calcite in a stalagmite from Carlsbad Caverns. Energy dispersive X-ray analysis indicates presence of Ca but not Mg.     Scanning electron microscope secondary electron image generated with a 4 keV acccelerating voltage; white scale bar at lower right is 10 microns long. Georgia Giant speleothem, Carlsbad Caverns, New Mexico, U.S.A; Sample CB69. Sample collected by Dr. George A. Brook; image generated with the kind help of Dr. John P. Shields of the University of Georgia Center for Advanced Ultrastructural Research.
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