The Churn Creek West bentonite showing is likely a faulted western extension of the Churn Creek showing (092O 081) located near the mouth of Churn Creek. The Churn Creek West occurrence is situated along the southern slopes of the Churn Creek valley.

The showing occurs within an assemblage of dominantly volcanic rocks of Eocene age which are correlative with those of the Kamloops Group east of the Fraser fault. At least two bentonitic ash layers, typically ten to twenty metres thick, occur within the accumulation of andesitic and dacitic volcanic breccias exposed along Churn Creek. Deformation along the Fraser fault has caused the bentonite layers to be structurally repeated on high angle, east-dipping reverse faults. This bentonite occurrence is the largest of the structurally repeated layers exposed along Churn Creek. It is likely that many of these layers extend both north and south beneath the Quaternary cover.