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Schiehallion
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==Geology== The majority of Schiehallion consists of [[quartzite]], a rock formed from an original sand by heat and pressure. Quartzite is a white or pinkish rock, in which the dominant mineral is [[quartz]]. People often mistakenly think that Schiehallion is an extinct volcano because its shape is reminiscent of an active volcano; in fact, it was formed by sedimentary processes and the shape is the result of erosion by ice during the ice ages.<ref>{{cite web| url=http://www.rannoch.info/Geology.htm| title=Geology of Rannoch| access-date=15 May 2017}}</ref>
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