GCR block - Pridoli (PRIDOL)


Block Description

UK map showing distribution of GCR sites of GCR block PRIDOL
Distribution of GCR sites of GCR block Pridoli

The GCR sites selected for this GCR Block represent the British geological record of Earth history from about 419 to 417 million years ago (Ma). This interval is the last epoch of the the Silurian Period (440 to 410 Ma).

Rocks that formed during the Prídolí Epoch form the Pridoli Series (part of the Silurian System). The Silurian System is divided into four series (Llandovery (see LDY), Wenlock (see WEN), Ludlow (see LUD) and Pridoli) and all but the Pridoli series is divided into stages. Of the eight stratotypes that define the bases to the Silurian stratigraphical divisions, seven are in Britain. The one exception is the base to the Prídolí Series. The chosen level for the base of the Devonian System in the Czech Republic is considerably higher than the base of the ‘Old Red Sandstone’ which had traditionally been regarded as the Silurian–Devonian boundary in the Welsh Borderland. The new Prídolí Series therefore correlates with the lowest part of the ‘Old Red Sandstone’ (see NMAR-DEV). Graptolites and conodonts have yielded the most refined Silurian zonations, but analogous schemes exist for other groups, notably brachiopods, acritarchs and chitinozoans.

For discussion of Silurian palaeogeography and palaeontology see LDY.

Volume Introduction


Site List

Your selection found 6 GCR sites. Sites are sorted alphabetically by country, local authority and then by site name -
CodeNameCountryLocal AuthorityGrid RefGCR Site Account
2831Brewin`s CanalEnglandDudley and SandwellSO936877Not available
2597Ludford Lane CornerEnglandShropshire CCSO506744Not available
2601Ludford Lane Section, Mortimer ForestEnglandShropshire CCSO477735Not available
1739Capel Horeb QuarryWalesPOWYSSN844324Not available
1734Albion Sands & Gateholm IslandWalesSOUTH WEST WALESSM771074Not available
1732Little Castle HeadWalesSOUTH WEST WALESSM855065Not available
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