The north-northwest trending Hozameen fault separates the low greenschist facies rocks of the Permian-Jurassic Hozameen Complex on the west, from the Lower-Middle Jurassic sediments of the Ladner Group to the east. A Late Cretaceous quartz diorite stocks intrudes the sediments along the east side of the fault.

The B.B. showing is adjacent to Hozameen Complex greenstone, volcanic chert, argillite and limestone. The regionally metamorphosed rocks generally contain fine-grained actinolite, epidote, chlorite and locally prehnite. Limestone is interbedded with the greenstone.

Three mineralized zones occur, paralleling the quartz diorite contact to the west. The easternmost zone consists of a steeply dipping fracture system in silicified limestone. Sulphide mineralization includes arsenopyrite, sphalerite and pyrite. A sample taken in 1927 across 10 centimetres assayed 0.69 gram per tonne gold, 377.1 grams per tonne silver and 2.0 per cent zinc.

The middle zone occurs in a 2.75 metre seam of altered limestone which hosts epidote, hornblende, pyroxene, wollastonite and garnet. Mineralization includes pods of arsenopyrite, sphalerite, chalcopyrite, galena, pyrite and pyrrhotite. Other minerals include sulphantimonide and sulpharsenide salts of lead, described as boulangerite and jamesonite. Quartz is the chief gangue mineral and occurs as either white, massive and sugary in texture or as clusters of individual, clear crystals.

Development work consists of a number of opencuts and short adits driven along narrow ore veins and replacement deposits which are generally parallel and trend 060 degrees with near vertical dips.

In 1938, a 23-centimetre sample of massive sulphides taken from a 0.9 metre quartz vein in the main workings analysed 6.86 grams per tonne gold, 822.8 grams per tonne silver, 0.4 per cent copper and 3.5 per cent lead (Minister of Mines Annual Report 1938, page F21).

Stripping 46 metres above the road indicated mineralization over 1.5 to 2.0 metres width in two narrow fractures. Mineralization consisted mainly of arsenopyrite with an antimony-bearing sulphide. A 10-centimetre sample analysed 0.68 gram per tonne gold, 678.8 grams per tonne silver and 1.8 per cent lead (Minister of Mines Annual Report 1938, page F21).