The area is underlain by hornblende biotite quartz diorite of the Owyacumish Creek pluton, gradational to the east with hornblende biotite granodiorite.
The hotspring issues from near the contact between the quartz diorite and granodiorite. It is about 38 degrees Celcius and con- tains the following constituents, in parts per million: Cl-52, Na-43, SO4-78, Mg-12, Ca-17, HCO3-40, SiO2-35.5. Total dissolved solids are 281 parts per million.