Search results
Results from the WOW.Com Content Network
The Grey Chalk Subgroup (formerly the Lower Chalk minus the Plenus Marls) is usually relatively soft and greyish in colour. It is also the most fossiliferous (especially for ammonite fossils). The strata of this subgroup usually begin with the ' Glauconitic Marl Member' (formerly known as the Glauconitic or Chloritic Marl), named after the ...
The Chalk Group which includes all of the different units which make up the succession in England, is subdivided into an earlier/lower Grey Chalk Subgroup and a later/higher White Chalk Subgroup. The Chalk has previously been subdivided in other ways and references to Upper, Middle and Lower abound in the literature and on geological maps.
The Ulster White Limestone Group is a late Cretaceous lithostratigraphic group (a sequence of rock strata) in Northern Ireland. The name is derived from the characteristic chalk rock which occurs particularly along the Antrim coast.
Upload file; Search. Search. Appearance. Donate; Create account; ... Download as PDF; Printable version; In other projects ... The White Chalk Formation is a Mesozoic ...
Subgroup analysis refers to repeating the analysis of a study within subgroups of subjects defined by a subgrouping variable. For example: smoking status defining two subgroups: smokers and non-smokers.
In mathematics, relatively hyperbolic groups form an important class of groups of interest for geometric group theory.The main purpose in their study is to extend the theory of Gromov-hyperbolic groups to groups that may be regarded as hyperbolic assemblies of subgroups , called peripheral subgroups, in a way that enables "hyperbolic reduction" of problems for to problems for the s.
A core-free subgroup is a subgroup whose normal core is the trivial subgroup. Equivalently, it is a subgroup that occurs as the isotropy subgroup of a transitive, faithful group action. The solution for the hidden subgroup problem in the abelian case generalizes to finding the normal core in case of subgroups of arbitrary groups.
Subgroup growth studies these functions, their interplay, and the characterization of group theoretical properties in terms of these functions. The theory was motivated by the desire to enumerate finite groups of given order, and the analogy with Mikhail Gromov 's notion of word growth .