page_title: Colonsay Group
hierarchical_section_title: Colonsay Group
caption_attribution_description: English: Geological map of Islay based on various sources, including McAteer et al. 2010, Pitcairn et al. 2010 and BGS maps
context_page_description: The Colonsay Group is an estimated 5,000 m thick sequence of mildly metamorphosed Neoproterozoic sedimentary rocks that outcrop on the islands of Colonsay, Islay and Oronsay and the surrounding seabed. They have been correlated with the Grampian Group, the oldest part of the Dalradian Supergroup.
context_section_description: The Colonsay Group is an estimated 5,000 m thick sequence of mildly metamorphosed Neoproterozoic sedimentary rocks that outcrop on the islands of Colonsay, Islay and Oronsay and the surrounding seabed. They have been correlated with the Grampian Group, the oldest part of the Dalradian Supergroup.
caption: Geological map of Islay
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