The Lorne plateau lavas are basaltic lava flows extruded in the late

Silurian The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozo ...

, 424 to 415 million years ago, which are found today in the

Oban Oban ( ; ' in Scottish Gaelic meaning ''The Little Bay'') is a resort town within the Argyll and Bute council area of Scotland. Despite its small size, it is the largest town between Helensburgh and Fort William. During the tourist season, th ...

Kerrera Kerrera (; gd, Cearara or ''Cearrara'') is an island in the Scottish Inner Hebrides, close to the town of Oban. In 2016 it had a population of 45, divided into two communities in the north and south of the island. Geology The oldest bedrock ...

area of Scotland.

Peperite A peperite is a type of volcaniclastic rock consisting of sedimentary rock that contains fragments of younger igneous material and is formed when magma comes into contact with wet sediments. The term was originally used to describe rocks from th ...

occurs where they flowed into

Old Red Sandstone The Old Red Sandstone is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the northeastern seaboard of North America. It also exte ...

lakes.

References

Volcanism of Scotland Lava flows Silurian volcanism {{UK-geology-stub