The Central Empire Road zeolite showing occurs within Eocene volcanic rocks which, west of the Fraser fault, are correlative with those of the Kamloops Group to the east of the fault.

At the Central Empire valley showing ochre red to brown basaltic breccia is overlain by rhyolitic lapilli tuff with minor interbeds of bentonite-rich ash. This tephra unit attains a thickness of about 20 metres. Analysis by X-ray diffraction has identified clinoptilolite- heulandite group zeolites. Cation exchange analysis of this sample (C2) determined an exchange capacity of 87.0 milli-equivalent per 100 grams.