A deposit of gypsite occurs on the ranch belonging to W.H. Hammond, known as the 'Basque Ranch', and located near Ashcroft. Mr. Hammond claims there is 90,710 tonnes of gypsite material. Mr. Hammond has placed several carload orders amongst the farmers of the district (Minister of Mines Annual Reports 1922, 1924).
Gypsite is an earthy variety of gypsum containing dirt and sand and is found as an efflorescent deposit occurring over the ledge outcrop of gypsum or of a gypsum-bearing stratum.
Rock in the vicinity appear to be Carboniferous to Jurassic Cache Creek Complex argillite and greenstone.