Appin Group
# Appin Group

The Appin Group is a thick sequence of metamorphosed Neoproterozoic sedimentary rocks that outcrop across the Central Highlands of Scotland, east of the Great Glen. It forms a part of the Dalradian Supergroup.

It is divided into three subgroups each consisting of multiple named formations. In stratigraphic order i.e. youngest at the top, these are:

Blair Atholl Subgroup

    Islay Limestone Formation
    Mullach Dubh Phyllites Formation
    Lismore Limestone Formation
    Cuil Bay Slates Formation

Ballachulish Subgroup

    Appin Phyllite & Limestone Formation
    Appin Quartzite Formation
    Ballachulish Slate Formation
    Ballachulish Limestone Formation

Lochaber Subgroup

    Leven Schist Formation
    Glencoe Quartzite Formation
    Binnein Schist Formation
    Binnein Quartzite Formation
    Eilde Schist Formation
    Eilde Quartzite Formation

This whole succession reflects alternate periods of deepening and filling of the sedimentary basin.

