page_title: Weald Clay
section_title: Vertebrates
hierarchical_section_title: Weald Clay / Paleofauna / Vertebrates
caption_attribution_description: Mantellisaurus atherfieldensis, • Based proportionally on a skeletal drawing by Gregory Paul (2008). • This was for a long time classified Iguanodon atherfieldensis. In 2006 Gregory Paul reassigned it to a genus, Mantellisaurus. • Paul suggested that Mantellisaurus was primarily Bipedal, based on its limb and body proportions, the one shown here is resting on all fours. &#91;1&#93; • The colours and/or patterns, as with nearly all reconstructions of prehistoric creatures, are speculative. NOTE: I often update my images. If you want to have any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used. This means that if I update an image, it will be updated on the site as well. Thanks. References ↑ Paul, Gregory S.&#32;(2008).&#32;"A revised taxonomy of the iguanodont dinosaur genera and species". Cretaceous Research&#32;29&#32;(2): 192–216. DOI:10.1016/j.cretres.2007.04.009.
context_page_description: Weald Clay or the Weald Clay Formation is a Lower Cretaceous sedimentary rock underlying areas of South East England, between the North and South Downs, in an area called the Weald Basin It is the uppermost unit of the Wealden Group of rocks within the Weald Basin, and the upper portion of the unit is equivalent in age to the exposed portion of the Wessex Formation on the Isle of Wight. It predominantly consists of thinly bedded mudstone. The un-weathered form is blue/grey, and the yellow/orange is the weathered form, it is used in brickmaking.
  The formation was deposited in lagoonal, lacustrine and alluvial conditions that varied from freshwater to brackish. The clay alternates with other subordinate lithologies, notably hard red-weathering beds of ironstone, limestone and sandstones, notably including the calcareous sandstone unit referred to as the Horsham Stone. It has a gradual, conformable contact with the underlying Tunbridge Wells Sand Formation, and has a sharp, unconformable contact with the overlying Atherfield Clay Formation, a shallow marine unit deposited after marine transgression during the Aptian.
caption: Mantellisaurus
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