The Elmer skarn is located east of Snippaker Creek about 4.5 kilometres north of the Snippaker airstrip.

The area is underlain by a package of altered, massive to bedded ash tuffs, tuffaceous sediments and massive limestones (of the Jurassic Stuhini Group?). The units strike east-southeast and dip steeply north.

These are intruded by early dikes and sills of altered, Lower Jurassic porphyritic quartz monzonite and late epidotized mafic andesite sills. The quartz monzonite contains variable amounts of megacrystic potassium feldspar, up to 2.5 centimetres long, together with some coarse hornblende phenocrysts. The intrusions, which locally contain xenoliths, are sporadically epidotized and cut by veinlets of potassium feldspar and pyrite.

Both the tuff-sediment package and the intrusions are cut by numerous northeast to north-northeast striking faults.

The extensive gossanous skarn occurs on a steep, west-facing slope. Farther upslope to the east, the mountaintop appears to be underlain by carbonate and there are numereous gossans that could mark other skarns.

The Elmer skarn is hosted by bedded tuff close to its faulted contact with a quartz monzonite intrusion. The banded skarn is characterized by an assemblage of epidote, potassium feldspar, tremolite-actinolite, quartz, carbonate and minor pyroxene cut by veinlets of epidote and potassium feldspar. Metallic minerals include magnetite, with moderate amounts of pyrite and traces of chalcopyrite. Pyrite veins ranging up to 4 centimeres in width also occur. No garnet was seen in outcrop, but mafic hornblende diorite and marble float at the toe of the glacier below the skarn outcrop contain veins of brown garnet rimmed with epidote. Boulders of magnetite-pyrite-bearing marble with yellow-green lizardite were also seen at this locality.

Assay results on two mineralized samples collected from this skarn show only low values of gold, silver and base metals.