Stratigraphic range: Late Berriasian-Aptian, 140–125 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
Coastal exposure of the Wealden Group near Bexhill-on-Sea
Type
Group
Sub-units
Weald Basin
Weald Clay Formation
Tunbridge Wells Sand Formation
Wadhurst Clay Formation
Ashdown Formation
Wessex Basin
Vectis Formation
Wessex Formation
Marginal - Whitchurch Sand Formation
Underlies
Lower Greensand Group
Overlies
Purbeck Group
Thickness
Up to 850 m in Weald Basin, c. 500 m in Wessex basin, few m in marginal areas
Location
Region
England
Country
UK
Type section
Named for
Weald
The Wealden Group, occasionally also referred to as the Wealden Supergroup, is a group (a sequence of rock strata) in the lithostratigraphy of southern England. The Wealden group consists of paralic to continental (freshwater) facies sedimentary rocks of Berriasian to Aptian age and thus forms part of the English Lower Cretaceous. It is composed of alternating sands and clays. The sandy units were deposited in a flood plain of braided rivers, the clays mostly in a lagoonal coastal plain.[1]
The Wealden Group can be found in almost all Early Cretaceous basins of England: its outcrops curve from the Wessex Basin in the south to the Cleveland Basin in the northeast. It is not found in northwest England and Wales, areas which were at the time tectonic highs where no deposition took place. The same is true for the London Platform around London and Essex. Offshore, the Wealden Group can reach a thickness of 700 metres.[1] The terms Wealden and Wealden facies are also used as generic terms referring to Early Cretaceous non-marine sequences elsewhere in Europe.
The WealdenGroup, occasionally also referred to as the Wealden Supergroup, is a group (a sequence of rock strata) in the lithostratigraphy of southern...
50°59′56″N 0°12′43″E / 50.999°N 0.212°E / 50.999; 0.212 Wealden is a local government district in East Sussex, England. Its council is based in Hailsham...
Sussex, England WealdenGroup, a group of rock strata in southern England, occasionally also referred to as the Wealden Supergroup Wealden iron industry...
mammals, for which the formation has become internationally important. The Wealden Beds are confined to the south and increase in thickness from 107 to 716...
in an area called the Weald Basin. It is the uppermost unit of the WealdenGroup of rocks within the Weald Basin, and the upper portion of the unit is...
in the core of two broad anticlines. In the Arreton boreholes the WealdenGroup reaches a total of 620 m. The exposed sequence comprises the upper part...
(1996). "The first European allosauroid dinosaur (Lower Cretaceous, WealdenGroup, England)". Neues Jahrbuch für Geologie und Paläontologie - Monatshefte...
Wadhurst Clay Formation is a geological unit which forms part of the WealdenGroup and the middle part of the now unofficial Hastings Beds. These geological...
Portland Group and it is conformably overlaid by the WealdenGroup; but there are in some districts distinct indications that the Portland Group was uplifted...
hailing from the Early Cretaceous Wessex Formation beds, included in WealdenGroup, located in the southwest coast of the Isle of Wight, United Kingdom...
also been found in the WealdenGroup. The results of their phylogenetic analyses are shown in the cladogram below, with WealdenGroup ankylosaurs highlighted:...
the Upper Jurassic. Above these, the Cretaceous rocks, include the WealdenGroup of alternating sands and clays – the Ashdown Sand Formation, Wadhurst...
Later, he claimed that it meant "Wealden lizard" ("wealden" being another word for forest), in reference to the WealdenGroup, the name for the early Cretaceous...
Whitchurch Sand Formation is a geological formation, in England. part of the WealdenGroup, it is preserved as an inlier in hills in Buckinghamshire, Oxfordshire...
12456. Hulke, J. W. (1872). "Appendix to a "Note on a new and undescribed Wealden Vertebra," read 9th February 1870, and published in the Quarterly Journal...
southern England the unit sharply but continuously overlies rocks of the WealdenGroup. While elsewhere as the sea level rose it covered previously emergent...
The Ashdown Formation is a geological unit, which forms part of the WealdenGroup and the lowermost and oldest part of the now unofficial Hastings Beds...
The 2023 Wealden District Council election was held on 4 May 2023 to elect all 45 members of Wealden District Council. This was on the same day as other...
Xenoposeidon, and azhdarchid pterosaurs. Much of his research has focused on WealdenGroup fossils from the Isle of Wight. He is founder of the vertebrate palaeozoology...
Cretaceous Vectis Formation (WealdenGroup) on the Isle of Wight, Southern England." Batten, D. J. (ed.) 2011. English Wealden Fossils. The Palaeontological...
Mantell-Bowerbank block from an outcrop of the Wessex Formation, part of the WealdenGroup, about one hundred yards west of Cowleaze Chine, on the south-west coast...
Barremian–early Aptian vertebrate assemblages from the Jehol Group, north-east China and the WealdenGroup, southern Britain: the value of microvertebrate studies...
taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower WealdenGroup (Cretaceous: Valanginian) of southern England" (PDF). Zootaxa. 2489:...
Brighstoneus is the third hadrosauriform taxon known from the upper WealdenGroup, distinct from both Iguanodon and Mantellisaurus. The Wessex Formation...
(2017). "New spinosaurid dinosaur finds from the Wessex Formation (WealdenGroup, Early Cretaceous) of the Isle of Wight". SVPCA. 65: 1. doi:10.13140/RG...
Global Information
UK