The Rob 2(B) showing is about 13.5 kilometres northeast of Stewart, on Radio Creek, approximately 150 metres north of the confluence of Radio and Bitter creeks.

The area is underlain by generally north striking, folded argillaceous siltstone and intercalated sandstone and pebble conglomerate of the Middle Jurassic Salmon River Formation (Hazelton Group) (Bulletin 63). These rocks are intruded by northwest trending, 3 to 30 metre wide, equigranular and porphyritic diorite and granodiorite dikes. A north-trending fault lies along Radio Creek.

The showing comprises quartz stringers, 1 to 5 centimetres wide, that occur along dike contacts. The stringers contain pyrite, chalcopyrite, sphalerite and galena (Assessment Report 19725). The mineralization is similar to that of the Rob 2(A) showing (104A 144), located about 1070 metres to the north of this showing.

The showing was probably known previously, but no work was reported on it until 1989. That year the showing was covered by the Rob 2 claim, held by A. Kikauka. Kikauka carried out some geological mapping and prospecting on the claim. The showing was mentioned at that time.