Editing Luing (section)

== Geology ==
The larger part of the bedrock of Luing is provided by the [[Neoproterozoic]] age Easdale Slate Formation, a [[pyrites|pyritic]], [[graphite|graphitic]] [[pelite]] belonging to the Easdale Subgroup of the [[Dalradian]] [[Argyll Group]]. Thin bands of [[quartzite]] are also present. Zones of [[metamorphism|metamorphosed]] intrusive [[igneous rock]]s occur within the northeast of the island. Luing is cut by NE-SW aligned [[Silurian|Siluro]]-[[Devonian]] [[felsite]] [[dike (geology)|dykes]] and by numerous later NW-SE aligned [[basalt]] and micro[[gabbro]] dykes which form a part of the ‘Mull Swarm’ which is of early [[Palaeogene]] age.
[[Raised beach|Raised marine deposits]] of sand and gravel occur widely around the margins of the island, a legacy of late [[Quaternary]] changes in relative sea-level.<ref>{{cite web |title=Onshore Geoindex |url=https://mapapps2.bgs.ac.uk/geoindex/home.html |website=British Geological Survey |publisher=British Geological Survey |access-date=5 February 2020}}</ref><ref>{{cite web |title= Kilmartin, Scotland sheet 36, Bedrock and Superficial deposits |url=http://www.largeimages.bgs.ac.uk/iip/mapsportal.html?id=1002368 |website=BGS large map images |publisher=British Geological Survey |access-date=5 February 2020}}</ref>