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Map of Mercia Mudstone Group's outcrop (Triassic) in Wales and southwest England The Mercia Mudstone Group is an early Triassic lithostratigraphic group (a sequence of rock strata ) which is widespread in Britain, especially in the English Midlands —the name is derived from the ancient kingdom of Mercia which corresponds to that area.
Mudstone on east beach of Lyme Regis, England. Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds.Mudstone is distinguished from shale by its lack of fissility.
Is dominated by mudstones with varying compositions and colors, divided into three main stratigraphic units: the lower beds, dark purple, marbled mudstones rich in carbonates. They contain calcitic replacements of small roots and show signs of pedogenic processes, including mud cracks and pseudobreccias.
The Port des Canonge Formation is a lower–middle Permian-age geologic formation in the Mediterranean island of Mallorca.It consists of red to brown-colored sedimentary rocks such as sandstone and mudstone, and is located in what back then was the western peri-Tethys Ocean.
The name 'Mercia' is a Latinisation of an Old English word derived from the Mercian Old English, Merce, meaning "borderland". [29] The dialect thrived between the 8th and 13th centuries and was referred to by John Trevisa, writing in 1387: [30]
Assuming that all the English south of the Humber are listed within the Tribal Hidage, he produced a map that divides southern England into Mercia's provinces and outlying dependencies, using evidence from river boundaries and other topographical features, place-names and historical borders.
On top of the Nether Alderley Sandstone lie the Mercia Mudstones which attain a thickness of 300 m, but these are only seen on the lower plains, it is in these beds that the halite lies. Mottling in the red blocky mudstone is of two main types,
The Kingdom of Mercia at its greatest extent (7th to 9th centuries) is shown in green, with the original core area (6th century) given a darker tint. This is a category for historical or geographical articles associated with the ancient Anglo-Saxon Kingdom of Mercia.