Barton Group

The Barton Group is a geological group found in the Hampshire Basin of Southern England. It ranges in age from Lutetian (Lower Eocene) to Priabonian (Upper Eocene).[1] It is exposed on the coast in southern Hampshire and in the northern part of the Isle of Wight. The type section is sea cliffs east of Christchurch, between Cliff End and Paddy's Gap.

Barton Group
Stratigraphic range: Lutetian - Priabonian
Friar's Cliff, cliffs - - 1210129.jpg
Boscombe Sand Formation near the base of the Barton Group, at Friar's Cliff near Highcliffe
Sub-unitsBoscombe Sand Formation, Barton Clay Formation, Chama Sand Formation & Becton Sand Formation
UnderliesSolent Group
OverliesBracklesham Group
Thickness~190 m
RegionHampshire Basin, England
CountryUnited Kingdom
Type section
Named forBarton on Sea

The Barton Group corresponds with the Bartonian age, which spans the time between 41.2 and 37.8 Ma in the middle Eocene epoch.


  1. ^ "Barton Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 25 March 2015.