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Cumbrian Coast Group
The Cumbrian Coast Group is a Permian lithostratigraphic group (a sequence of rock strata In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...) which occurs in the western part of Cumbria in northern England. Distribution and stratigraphy The group outcrops near Whitehaven on the Cumbrian coast and beneath the Vale of Eden. It comprises the St Bees Evaporite and the overlying St Bees Shale Formation which are between 0 and 100m and 0 and 215m thick respectively. The lower formation sits atop the mixed lithology breccia known as Brockram. It is also found beneath the Irish Sea where the Barrowmouth Mudstone Formation is the equivalent of the St Bees Shale Formation. The Group can achieve thicknesses in excess of 300m here. References Geology of Cumbria Permian System of Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Group (stratigraphy)
In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into supergroups. Groups are useful for showing relationships between formations, and they are also useful for small-scale mapping or for studying the stratigraphy of large regions. Geologists exploring a new area have sometimes defined groups when they believe the strata within the groups can be divided into formations during subsequent investigations of the area. It is possible for only some of the strata making up a group to be divided into formations. An example of a group is the Glen Canyon Group, which includes (in ascending order) the Wingate Sandstone, the Moenave Formation, the Kayenta Formation, and the Navajo Sandstone. Each of the formations can be distinguished from its neighbor by its lithology, but all were deposited in the same vast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
