The Arsenic occurrence is reported to occur on the Koksilah River in the area of Boucicault Creek, approximately 1.6 kilometres south of the King Solomon (MINFILE 092B 015) past-producer.

The area is underlain by basaltic volcanic rocks of the Middle to Upper Devonian Duck Lake Formation, Sicker Group. Limestone of the Mississippian to Lower Permian Mount Mark Formation, Buttle Lake Group, are exposed to the north east and west.

Locally, arsenopyrite and native arsenic are reported to occur.