The Aitkens/Stable showing is located 21 kilometres south- southwest of Vernon, between Ribbleworth and Clark creeks.

In this area, east of the Okanagan Valley fault zone, sedimentary and volcanic rocks of the Devonian to Triassic Harper Ranch Group are in probable fault contact with metamorphic rocks of the Shuswap Terrane. Middle Jurassic granitic plutons intrude the older rocks. Eocene Penticton Group and Miocene Chilcotin Group volcanic and sedimentary rocks cap areas of older rock.

Basal, partly cemented, well-rounded, quartz pebble gravels of Miocene fluvial deposits host placer gold mineralization. The fluvial deposits unconformably overlie gneissic rocks containing amphibolite and/or volcanic rocks of the Penticton Group. The fluvial deposits extend over a 5000 by 1500 by 60 metre area and includes the Ribbleworth (082LSW019), Stuart (082LSW072) and Winfield (082LSW093) showings. The Miocene sediments are commonly overlain by Miocene plateau basalt flows. The gold is pure (850 fine), of a reddish colour, and is found as flattened pellets up to 2 millimetres in size, with some very fine gold reported. Garnet and a little magnetite occur with the gold.

By 1936, an exploration drift had been completed. A total of 2330 grams of placer gold production, between 1933 and 1945, has been reported from the Winfield camp. In 1977-79, Union Oil Company explored the Miocene sediments for uranium. Geological mapping, hydrogeochemical, radiometric, airborne magnetometer and drill programs were conducted.