Kinloch Laggan Road A86
Geological Conservation Review site | GCR #2705 | Structural and Metamorphic Geology | Dalradian
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Summary
Site now merged with 854 (same SSSI) The type locality and only accessible exposures of the Kinlochlaggan Boulder Bed, which immediately underlies the Kinlochlaggan Limestone, a correlative of the Ballachulish Limestone. This is one of a small number of boulder beds within the Dalradian. This one is not now thought to be a correlative of the widespread Port Askaig Tillite, but to be older, occurring stratigraphically at the boundary between the Lochaber and Ballachulish Subgroups of the Appin Dalradian. It is extremely important in terms of the palaeoenvironment of the Dalradian. The lithology of the boulder bed (scattered clasts, from 2mm to 150mm diameter, mainly of granite unevenly distributed in a poorly bedded quartzitic matrix), suggests a glaciomarine origin. However, little research has yet been carried out on the minor boulder beds of the Dalradian. Therefore, the full potential of localities such as this, in terms of correlation and the palaeoenvironment investigations lies with future research.
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