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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.
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.
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.
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]
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,
Mercian was a dialect spoken in the Anglian kingdom of Mercia (roughly speaking the Midlands of England, an area in which four kingdoms had been united under one monarchy). ). Together with Northumbrian, it was one of the two Anglian dial
The English lands were unified in the 10th century in a reconquest completed by 927. [5] During the Heptarchy, the most powerful king among the Anglo-Saxon kingdoms might become acknowledged as Bretwalda, a high king over the other kings. The decline of Mercia allowed Wessex to become more powerful, absorbing the kingdoms of Kent and Sussex in 825.