A bentonite seam outcrops 150 metres southeast of the Princeton- Copper Mountain road, 0.6 kilometre southeast of the Similkameen River, about 0.5 kilometre east of the Princeton Bentonite deposit (092HSE151).
The seam is hosted in tuffaceous, arkosic wacke of the Eocene Allenby Formation (Princeton Group). The bed is 1.8 metres thick and composed of light yellow clay. The deposit dips gently south.
A short adit was excavated some time prior to 1924.