Mudstone

These boulders are grey-coloured septarian concretions, which have been exhumed from the mudstone and bedrock enclosing them and concentrated on the beach by coastal erosion.

The lower facies comprises the Peterborough Member, a fossiliferous organic-rich mudstone.

The submarine geology between the main groups is formed by sandstones and mudstones of Cambro-Ordovician age, though the bedrock is partly covered by sand and gravel.

The Bright Angel Shale consists of locally fossiliferous, green and red-brown, micaceous, fissile shale (mudstone) and siltstone with local, thicker beds of brown to tan sandstone and limestone.

Clifton Down Limestone, which includes calcite and dolomitic mudstones of the Carboniferous period, is found in the adjoining central band and dolomitic conglomerate of the Triassic period.

Ukhaa Tolgod (also spelled Oka Tolga): The strata exposed at Ukhaa Tolgod is dominated by reddish sandstones, with some sandstones containing small amounts of conglomeratic lenses and/or cobbles and pebbles. Conglomerate itself is in this site, and to a lesser level are mudstones and siltstones, which are thin and laterally restricted.

is a series of fresh and brackish-water clays, mudstones, and sandstones deposited during the Maastrichtian and Danian (respectively, the end of the Cretaceous period and the beginning of the Paleogene) by fluvial activity in

Homoclinal ridges are the expression of regional outcrops of moderately dipping strata, typically sedimentary strata, that consist of alternating beds of hard, well-lithified strata, i.e. sandstone and limestone and weak or loosely cemented strata, i.e. shale, mudstone, and marl.

The formations consist of red-brown sedimentary conglomerate, sandstone, and minor mudstone rock from the Carboniferous Hopewell Cape Formation, part of the Mabou Group.

It is of Late Cretaceous age, Campanian to early Maastrichtian stage (Edmontonian Land-Mammal Age), and is composed of mudstone, sandstone, carbonaceous shales, and coal seams.

The Mercia Mudstone Group is a middle to late 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.

The desert is composed of stratified layers of siltstone, mudstone, and shale of the Triassic Chinle Formation, which erode easily.

The different layers of colors are due to the soil being composed of a combination of mudstone, siltstone, shale and lignite.

In general, the geology of the Sierra Nevada del Cocuy consists on sedimentary rocks from the Cretaceous, broadly made up of sequences of quartzites, sandstones and fine-grained mudstones of Aptian and Cenomanian ages.

The 70-metre-thick (230 ft) lower layer, known as the "Graafwater Formation", consists of distinctively maroon-colored mudstones, which were laid down in much thinner horizontal strata than the Table Mountain Sandstone strata above it.

The bottom of the valley of Jackson Creek also exposes a prehistoric buried creek valley, which is cut into 400 million year-old (Silurian) mudstones and sandstones.