Abstract
DURING an excursion to Lizard Head (Cornwall), we examined in some detail the exposures of serpentine at the water-edge. At a point situated about 500 metres south-east of Kynance Cove Hotel, our attention was attracted by the presence of numerous white veinlets, standing out against the dark colour of the rock. One of them, almost vertical, about 5 cm. wide, shows on its upper face a thin layer of a fibrous mineral. The chemical analysis, differential thermal curve, and graph of weight-loss as a function of temperature for this mineral are similar to those obtained with Ampandrandava sepiolite. The few differences observed can be attributed to the presence of calcite associated with the Kynance Cove mineral.
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