Index No: NBM021960; Collected By: ; Sample Type: hand sample (missing); Notes: Chalcedony; stockwork of clear chalcedonic quartz veinlets in buff, soft limestone of Horse Spring Formation; veins up to 1cm in zone exposed over about 1m in width; zone strikes N60�E, dips 10�-15�NW; rock in vicinity of veining is bleached in appearance (hot spring system ?)