The Mount McGuire limestone occurrence is located on Borden Creek, approximately 22 kilometres south east of Chilliwack.

Regionally, the area is underlain by the Cultus Lake Formation and the Chilliwack Group. The Cultus Lake Formation is made up of mainly siltstone, shale and sandstone of Triassic to Jurassic age. The Chilliwack Group consists of Permian sandstone, shale and conglomerate and Pennsylvanian limestone and basic to intermediate volcanics.

Locally, there is a thick sequence of shallow to steeply dipping beds of limestone. The limestone can be traced from just west of the creek, which forms the eastern boundary of the claims at an elevation of approximately 1,160 metres, to the summit of Mount McGuire, at elevation of 2,019 metres, forming the western boundary of the claims.

The area has been explored for limestone since the 1990’s by Brock McMichae. In 2004, the claims were acquired by Western Exploration Inc. and a program of mapping and sampling was completed.

In 1999, an 80 kilogram bulk sample was sent for analysis, which averaged 53.91 per cent calcium oxide or 96.22 per cent calcium carbonate and 3.24 per cent silica dioxide (Assessment Report 27682).

In 2004, mapping and sampling identified, at least, 2 grades or beds of limestone. One bed shows higher calcium oxide content, averaging about 96 per cent in calcium carbonate and 3 per cent silica dioxide. The other bed has an increased silica content, averaging at least 23 per cent silica dioxide and 80 per cent calcium carbonate (Assessment Report 27682).

Estimated volume of limestone on the South ridge deposit is calculated to be ion the order of 1.5 billion tonnes. Limestone totalling on the order of 2 to 3 billion tonnes is estimated to be in place on the LST 1-2 claims, about 1 billion tonnes of which could easily be extracted by a quarry operation (Assessment Report 27682).