"Beinn An Dothaidh Formation"@en . "stable"@en . "Lower part comprises a calcareous semipelite to calcsilicate rock about 5m thick, locally tremolite-bearing. The calcareous unit is succeeded by alternating layers (approximately 10 to 30cm thick) of muscovite-rich semipelite, psammite and thin quartzite. Grossular-bearing amphibolite schist and coarser plagioclase-amphibolite are locally developed within the formation. In the area around Beinn a'Chuirn, quartzite is more dominant in the uppermost parts of the Beinn an Dothaidh Formation; this unit is recogniZed as the Allt a'Chuirn Quartzite Member."@en . . "Sharp change massive garnetiferous semipelite of the Coire Daingean Semipelite Formation to the alternating muscovite-rich semipelite, psammite and quartzite of the Beinn an Dothaidh Formation. A calcareous semipelite of calcsilicate-rock (c.5m thick) may be present locally at the base of the Beinn and Dothaidh Formation."@en . . . "Beinn An Dothaidh Formation"@en . "635.0"^^ . "Psammite, quartzite and semipelite with subsidiary calcareous semipelite and trace amphibolite, calcsilicate-rock and schistose amphibolite. Stratified bedrock. Occurs onshore. Deposited during the Cryogenian Period (Precambrian) (720-635 Ma BP)."@en . "DOTH"@en . "The formation is estimated to be about 180 to 200m thick on Beinn a'Chaisteil but is typically apparently thickened by the effects of fold duplication."@en . . . . . . "720.0"^^ . . "Change to the more uniform garnetiferous semipelite rocks of the Beinn Dorain Semipelite Formation. In the area around Beinn a'Chuirn, quartzite is more dominant in the uppermost parts of the Beinn an Dothaidh Formation; this unit is recognised as the Allt a'Chuirn Quartzite Member."@en .