Twin Creek flows southeast into the headwater area of Kwanika Creek approximately 15 kilometres southwest of the west end of Germansen Lake. The Twin Creek locality corresponds to the occurrence of placer gold in Twin Creek. The region is underlain by the Middle Triassic-Lower Jurassic Takla Group. The contact between the Upper Triassic Plughat Mountain Formation (Takla Group) and the Lower Jurassic Twin Creek Formation (Takla Group) occurs 500 metres upstream from the occurrence locality (Open File 1993-4). A maroon, augite olivine porphyritic basalt marks the Triassic volcanic package in the immediate area. It is unconformably overlain by probable Jurassic-age heterolithic plagioclase, augite and hornblende-bearing porphyritic lapilli tuffs and breccia. The Plughat Mountain Formation is correlative to the Witch Lake Formation (Takla Group) of the Nation Lakes area and the Twin Creek Formation is correlative to the more felsic Chuchi Lake Formation (Takla Group).

Four kilometres to the west of the placer showing, maroon quartz feldspar porphyritic volcanics of the Twin Creek Formation are intruded by an early phase of the Late Triassic-Early Cretaceous Hogem Intrusive Complex.

The earliest work reported on the creek occurred in 1946 when Winifred Tait prepared the Martin leases for hydraulicking. By 1948, a small hydraulic plant had been installed and operations had commenced. In early 1949, gravels from a pit on the creek were being washed with a 10-centimetre diameter monitor. However, bedrock was never reached and results were reported as disappointing.

Production figures for the creek are unknown, but are thought to be small. Today, remnants of a sluicing system several kilometres long follows the east side of Twin Creek. An old cabin and more recent placer excavations are apparent at the Takla Landing-Manson Creek road crossing of Twin Creek.