Geological Periods of Warwickshire

Geology of Warwickshire

The history of the Earth is broken down into a series of divisions known as Periods. These vary in length of time, but often mark significant events in the Earth's evolution such as environmental or evolutionary change. Collectively, geological Periods make up the Stratigraphic Column. Warwickshire is fortunate to have a wide selection of rocks of varying age.

The Periods from the oldest to the youngest are:

Periods from the oldest to the youngest:		Rocks found in Warwickshire:

Precambrian Click here for more information		Caldecote Volcanic Formation

Cambrian	Palaeozoic	Hartshill Sandstone, Stockingford Shale
Ordovician		Stockingford Shale, Caledonian intrusions
Silurian		Derived pebbles in Carboniferous conglomerates
Devonian		Oldbury Farm Sandstone
Carboniferous		Coal Measures Group, Warwickshire Group
Permian		Warwickshire Group

Triassic Click here for more information	Mesozoic	Sherwood Sandstone, Mercia Mudstone, Penarth Group
Jurassic Click here for more information		Lias, Inferior Oolite, Great Oolite
Cretaceous		Flints in Quaternary deposits

Palaeocene	Tertiary	Not present in Warwickshire
Eocene		Not present in Warwickshire
Oligocene		Not present in Warwickshire
Miocene		Not present in Warwickshire
Pliocene		Not present in Warwickshire

Pleistocene	Quaternary	Till, glacial clays, sands and gravels
Holocene	Quaternary	River terrace and modern river deposits

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