- Unconformity -

Cambrian Succession

Laid down in the sea

Durness: dolomitic limestone
Salterella Grit: impure sandstone with small shelly fossils
Fucoid Beds: dolomitic siltstone
Pipe Rock: quartz sandstone with vertical burrows
Basal Quartzite: quartz sandstone with cross bedding

Age 540 - 500 million years
Upper part of Durness limestone is Ordovician, less than 500 million years

Thickness of Basal Quartzite plus Pipe Rock is about 150 metres

Rocks

Fractured limestone
Grey limestone

Salterella Grit 1
Salterella Grit 2 (fossils)

Fucoid Beds

Pipe Rock

Basal Quartzite

Also:

Marble 1
Marble 2

- Unconformity -

Torridonian Succession

Laid down mainly by rivers

Torridon Group
mostly red-brown sandstones
Age about 1000 million years
Thickness up to 6 kilometres

Stoer Group
Red-brown sandstone, conglomerate, mudstone
Age about 1200 million years
Thickness up to 2 kilometres

Rocks

Torridon sandstone

Volcanic mudflow

Stoer sandstone

Stoer conglomerate

Lewisian Gneiss Complex

Mostly igneous rocks, folded and highly metamorphosed

Laxfordian
Gneiss (pink) with granite sheets (red)
Age about 1750 million years

Scourian
Gneiss (pink) with mafic dykes (green)
Age about 2700 million years

Rocks

Laxfordian granite
Laxfordian gneiss
Amphibolite

Scourie dyke
Pegmatite

Felsic gneiss 1
Felsic gneiss 2
Mafic gneiss
Ultramafic gneiss