Keuper marl is a former and now deprecated term for multiple layers of mudstone and siltstone of Triassic age which occur beneath parts of the English Midlands and neighbouring areas e.g. Cheshire,[1] Nottinghamshire,[1] Devon, eastern Worcestershire and northern Yorkshire.[citation needed]
Typically red, or occasionally green or grey, these strata are generally featureless and contain few fossils. In basin formations, thick halite-bearing layers, or rock salt deposits, are sometimes present at the base of the marl.
In modern nomenclature, Keuper marl is included within the Mercia Mudstone Group.[1][2]
^ abcBritish Geological Survey: Lexicon of Named Rock Units: Mercia Mudstone Group (accessed 10 April 2010)
^Benton M, Cook E, Turner P. Permian and Triassic Red Beds and the Penarth Group of Great Britain, pp. 11, 19. Geological Conservation Review Series, No. 24 (Joint Nature Conservation Committee; 2002) Archived 2011-02-04 at the Wayback Machine (ISBN 1 86107 493 X)
Keupermarl is a former and now deprecated term for multiple layers of mudstone and siltstone of Triassic age which occur beneath parts of the English...
Penarth Grey, red and green marls, black shales, and so-called white (3.0–45.7 m, 10–150 ft). Upper Keupermarl, red and grey marls and shales with rock salt...
area. It is frequently encountered in older literature as the KeuperMarl or KeuperMarl Series. The Mercia Mudstone Group is now divided into five formations...
of the Triassic Keupermarl, overlain with permeable Greensand and clay-with-flints. The junction between the Greensand and KeuperMarl forms a spring...
saurians, which occur in the Rhaetic Black Paper Shales that lie above the Keupermarls, in the south-west of England. A similar bone bed has been traced on...
side erosion) of water. In less erosion-resistant rocks of the keuper like the clays or marls, the valleys are more deeply carved out so that many wider-profiled...
Borough or Tutteyate. It is a natural hill of Triassic sandstone capped by Keupermarl. Excavations showed evidence of a medieval masonry building on the top...
stream, it is one of Cheshire's best examples of clough woodland on keupermarl. It covers a total area of 5.35 hectares (13.22 acres). It is owned and...
land of the Somerset Levels. It is made of Triassic sandstone capped by Keupermarl ascribed to the Mercia Mudstone Group. Burrow Mump is also known as St...
Woodland and one of the best examples in Cheshire of clough woodland on keupermarl. There are five Local Nature Reserves designated under the National Parks...
largest brickworks were formerly on the high ground at Mapperley, as its Keupermarl (now known as Mercia Mudstone), was suitable for brick making. This led...
(equivalent to the Bunter and lower Keuper) the Mercia Mudstone Group (argillaceous, halitic) (equivalent to the KeuperMarl) the Penarth Group (not seen at...
Gypsum alabaster is a common mineral, which occurs in England in the Keupermarls of the Midlands, especially at Chellaston in Derbyshire, at Fauld in...
Cheshire lies to the south. The geology of South Trafford is Keupermarl with some Keuper waterstone and sandstone, whilst the geology of North Trafford...
the National Trust, is a natural hill of Triassic sandstone capped by Keupermarl, standing at a strategic point where the River Tone and the old course...
Borough or Tutteyate. It is a natural hill of Triassic sandstone capped by Keupermarl. Excavations showed evidence of a 12th-century masonry building on the...
Pebble Beds and Sandstone outcrops. To the east are heavy claylands of KeuperMarl. Retford lies 18m above sea level and the climate is mild, and generally...
Ordnance datum (mean sea level) are made up of limestone, rheatic clay and Keupermarl covered with calcareous grassland, scrubland and coppiced woodland. A...
an average elevation of around 65 metres. The underlying geology is Keupermarl (Mercia Mudstone Group), a red sandstone laid down during the Triassic...
known as the KeuperMarl), overlain in the west by more mudstones of the late Triassic age Blue Anchor Formation (formerly ‘Tea Green Marls’), a thin unit...
chiefly at a height of about 400 ft. above sea-level, the soil being Red KeuperMarl overlaid with pockets of clay, gravel, and sand. With the exception of...
from Thirsk. The soil in the area is a light gravel or sand laid over Keupermarl with some lower lias and alluvium also present. The 1881 UK Census recorded...
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