The CAL B marble occurrence is situated approximately 700 metres south of the old Nootka Marble Quarry (MINFILE HISNET INLET 092E 020) on the east side of Hisnit Inlet. The site is approximately 33 kilometres west of Gold River and is accessed via roads off the Head Bay Forest Service Road between Gold Rover and Tahsis.

CAL B is one of the several marble showings / quarries within Callache Stone Quarries Inc.'s Tahsis property, including the Nootka Quarry, the CAL A prospect, the Century Limestone showing and the Tlupana Arm magnesite showing. The Triassic Quatsino Limestone Formation on the property wraps around an Eocene Quartz Diorite Stock situated in the south of the peninsula between Hisnit Inlet and Tlupana Inlet (Head Bay).

In 2016 and 2017, logging road rehabilitation exposed semi-continuous bedrock at the CAL B occurrence, consisting of approximately 99 per cent marble and 1 per cent intrusive dikes over a strike length of approximately 650 m.