Barton Group
The Barton Group is a geological group found in the Hampshire Basin of Southern England. It ranges in age from Lutetian to Priabonian. 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.
The Barton Group corresponds with the Bartonian age, which spans the time between 41.2 and 37.8 Ma in the middle Eocene epoch.