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The Weald–Artois Anticline, or Wealden Anticline, is a large anticline, a geological structure running between the regions of the Weald in southern England and Artois in northern France. The fold formed during the Alpine orogeny, from the late Oligocene to middle Miocene as an uplifted form of the Weald basin through inversion of the basin.
The geology of East Sussex is defined by the Weald–Artois anticline, a 60 kilometres (37 mi) wide and 100 kilometres (62 mi) long fold within which caused the arching up of the chalk into a broad dome within the middle Miocene, [1] which has subsequently been eroded to reveal a lower Cretaceous to Upper Jurassic stratigraphy.
In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that dip away from
The Weald–Artois Anticline continues some 40 miles (64 km) further south-eastwards under the Straits of Dover, and includes the Boulonnais of France. [ 4 ] Many important fossils have been found in the sandstones and clays of the Weald, including, for example, Baryonyx .
The existence of the same strata within the Weald basin which are the source rocks for the Wytch Farm oilfield in Dorset led to an interest in the petroleum potential of the Wealden anticline, with exploration taking place on Ashdown forest examining the Ashdown Anticline, a large structure over 30 km long x 7 km wide, located in the centre of ...
West Sussex extends across a part of the Weald-Artois Anticline, a broad east-west aligned fold associated with the Alpine Orogeny. This largely gentle fold sports lesser folds on its southern flanks such as the sub-parallel Portsdown Anticline runs from just north of Fareham in Hampshire east via Wymering to the southern edge of Chichester.
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Weald Anticline: England Weald-Artois Anticline: England Wealden Anticline: England Brenchley & Rawson 2006 Weeton Anticline: Lancashire England E&W 67 Welbeck Trough: England E&W 112 Werrington Anticline: England Smith et al. 2005 Wessington Anticline: England E&W 112 Westbury Anticline: England E&W 264 West Mainland Anticline: Shetland ...