The Sherwood Creek diatomite occurrence is located on the north side of Sherwood Creek, east of Snohoosh Lake in the Deadman River valley. The area is accessible on a good-quality gravel road north from the Trans-Canada Highway west of Savona, 40 (air) kilometres to the south.
The Sherwood Creek diatomaceous earth showing lies near the base of a Miocene channel filling of fluviatile and lacustrine sediments occupying the northwest trending Mio-Snohoosh Channel. A section measured by Campbell and Tipper contained a minimum aggregate thickness of 4.3 metres of diatomaceous earth in two beds lying within 41.5 metres of the base of the section (GSC Memoir 363). The unit lies within the Deadman River Formation of the Chilcotin Group.
Mr. Michael Dickens staked the property as a potential source of volcanic ash (pozzolan) in 1991 (see also Sherwood Creek Volcanic Ash, 092P 093). The Tertiary stratigraphic section was measured by Campbell and Tipper in 1971 (Geological Survey of Canada Memoir 363, page 58).