The Mount Lay occurrence is located on the centre of a ridge crest, 5.15 kilometres northeast of the summit of Mount Lay and approximately 99 kilometres north of the community of Germansen Landing.

Regionally, the area is underlain by a series of northwest trending sedimentary rocks of the Neoproterozoic Ingenika Group and include argillite, greywacke, wacke and conglomerate turbidites of the Swannell Formation, mudstone, siltstone, shale and fine clastic sedimentary rocks of the Tsaydiz and Stelkuz formations and limestone, marble and calcareous sedimentary rocks of the Espee Formation.

Limestone of the Neoproterozoic Espee Formation (Ingenika Group) is exposed along the crest of a ridge 4.8 kilometres northwest of the summit of Mount Lay, west of the Swannell River. The limestone strikes north and dips 40 degrees west.

The Mount Lay limestone showing is comprised of massive to platy, light pinkish grey, fine-grained limestone displaying round markings 1 to 3 millimetres in diameter, which resemble algal structures. In places, the limestone has been replaced by buff to reddish brown, generally coarse-grained siderite. In 1954, a grab sample (181C) analysis yielded 50.58 per cent CaO, 1.68 per cent MgO, 5.16 per cent insolubles, 0.92 per cent Al2O3 plus Fe2O3, 41.06 per cent CO2 and 1.38 per cent water (Geological Survey of Canada Memoir 274, page 68).

Work History

The area was originally noted for its high purity limestone and decorative marble in 1954. In 2015, the area was prospected, mapped and sampled as the Bacon 1 claim by David Deering.