The occurrence is located approximately 30 kilometres west of Castlegar, just north of Highway 3. The occurrence is approximately 400 metres northwest of Nancy Greene Lake.

Regionally, the area is underlain by porphyritic granite, granodiorite, quartz monzonite, monzonite, and tonalite making the Middle Jurassic Nelson intrusions. These are intruded by coarse-grained porphyritic syenite, lesser granite, diorite, and monzonite, named Middle Eocene Coryell batholith and tertiary mafic dikes (MINFILE 082ESE275 – JJ).

Locally, the Au-As occurrence has been described as a gold-bearing, arsenopyrite-rich zone exposed low escarpment. The occurrence is located within the hornblende porphyritic granite unit of the Middle Jurassic Nelson Intrusions. Trenching has found the occurrence in relatively unaltered, fine grained monzonite cut by lamprophyre dikes. Gold and arsenic mineralization has been observed.

In 2003, an exploration program by Kootenay Gold Corp. found rock grab samples grading 0.014 to 2.71 grams per tonne gold and 0.0012 to greater than 1 percent arsenic (Turner, A. (2008-03-27): Technical Report on 2007 Exploration at the Jumping Josephine Property). This occurrence is within the Nelson intrusions.

In 2008, Astral completed a trenching and grab sampling program to test gold bearing potential of arsenopyrite-rich zone exposed in 2003. Grab samples returned a maximum result of 2.71 grams per tonne gold (Turner, A. (2008-03-27): Technical Report on 2007 Exploration at the Jumping Josephine Property). No significant results were found in the trenching program.