The Murphy-Johnson showing consists of patches and stringers of quartz occurring in a zone of calcite and siderite about 30 metres in width. The area is underlain by andesite to basalt of the Upper Triassic Karmutsen Formation, Vancouver Group. The quartz carries fine-grained pyrite and traces of sphalerite. Gold values are reported to be low. A shallow shaft was sunk prior to 1931, about 22 metres back from the shore.