The Spine is underlain by the contact zone the Max stock of the Bulkley plutonic Suite. The country rock includes sandstone, siltstone, argillite and conglomerate of the Middle Jurassic to Lower Cretaceous Bowser Lake Group. These have been intruded by stocks of the Upper Cretaceous Bulkley Plutonic Suite. The intrusions range compositionally from diorite-quartz diorite to granodiorite and tonalite, and texturally they include both equigranular and porphyritic varieties. A contact metamorphic hornfels has developed for 300 metres or more around the intrusive. The sedimentary rocks are highly fractured and, locally, hydrothermally altered.

Veins hosted by the Cretaceous-age Max Stock and its hornfelsic envelope include “Arseno” and possibly the “Spine” occurrences , which are north to northeast striking veins that contain pyrite and arsenopyrite plus/minus galena plus/minus sphalerite.

The Spine Showing lies within a steeply dipping, north to northeast striking shear zone that cuts argillite and conglomerate close to the southern margin of the Max Stock. The Spine contains some of the higher gold values with one sample assaying 22.7 grams per tonne gold across 15 centimetres in a chip sample (Assessment Report 18572). The mineralization includes abundant galena with sphalerite, arsenopyrite, pyrite and probable some sulfosalts. The Lower Spine showing lies 35 metres down slope and it is believed to be a strike continuation of the Spine.

Refer to Max (093M 027) for geological details and a common work history.