The Moberly quarry is located 8 kilometres north of Golden on the southwest slopes of Moberly Mountain, just south of Moberly Creek on the east side of the Columbia River.

Two bands of Middle and/or Upper Ordovician Mount Wilson Formation quartzite cross the property striking at about 140 degrees with dips varying from 74 degrees northeast to vertical. The northeasterly band has an average indicated true thickness of 790 metres while the southwesterly band has an approximate true thickness of 455 metres. Due to thrusting, the bands are separated by about 600 metres.

A friable quartz sandstone zone, with a thickness of 90 to 120 metres, is located parallel and close to the southwest margin of the southwest quartzite band. An anticlinal axis trends down the middle of the southwest quartzite band. The compact quartzite is frosty white and consists of well-rounded quartz-cemented grains 0.125 to 0.25 millimetre in diameter. The quartz sandstone is pale buff to almost white with rounded grains falling into two size groups; 0.5 millimetre and 0.15 to 0.25 millimetre. An analysis of washed sand yielded: 99.67 per cent SiO2, 0.02 per cent Fe2O3, 0.06 per cent Al2O35, 0.06 per cent CaO, 0.02 per cent MgO, 0.01 per cent Na2O, 0.02 per cent K2O, 0.01 per cent TiO2 and 0.12 per cent LOI (Open File 1987-15).

Quarrying operations have taken place mainly on the quartz sandstone zone. Production began in 1980 and the quarry is operated by Mountain Minerals Company Ltd. Estimated reserves in 1985, from company specifications, amounted to 10 million tonnes of friable quartz sandstone grading 99.6 per cent (Z.D. Hora, personal communication, 1991) and 50 million tonnes of quartzite grading 99 per cent plus (Open File 1987-15; 1992-1). The product is used as glass, foundry and blasting sand. Estimated annual production for 1980-1985 is 80,000 to 100,000 tonnes per season.

Mountain Minerals Company Ltd. is producing approximately 80,000 tonnes annually at Moberly for shipment to Springfield, Oregon (Information Circular 1996-1, page 9).

In 1996, the mine was producing approximately 140,000 tonnes per year with shipments going to Springfield, Oregon; Lavington, B.C. and other destinations (Information Circular 1997-1). The mine is operated by Highwood Resources Ltd.

HCA Mountain Minerals (Moberly) Ltd. produced 100,000 tonnes of silica sand from the quarry.