Gold production of 902 grams was recorded for the period 1876 to 1880 from Fall Gulch, a tributary of Thibert Creek, about 30 kilometres west of the north end of Dease Lake.
The creek drains an area underlain by chert, cherty argillite, argillite, siltstone and volcanic sandstone of the Mississippian-Triassic Kedahda Formation (Cache Creek Complex) and Pleistocene and Recent glacial and glacio-fluvial deposits.