Kentallenite. Lochaber, Scotland.

This is a thin section microscope slide of Kentallenite, a rare rock collected from the type location at Kentallen, on the shores of Loch Linnhe, in Scoland. Contains Olivine augite, biotite, and both plagioclase and orthoclase feldspar. Spectacular under crossed filters, the different minerals show up well and are easy to identify except the feldspars, which are a little more challenging. An unusual rock and difficult to classify, probably best called an olivine monzonite. See page 105 Atlas of Igneous rocks, MacKenzie et al. Highly recommended slide , to form part of any collection of Scottish rocks. The photos do not do it justice.

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