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Marnes De Villers
The Marnes de Villers is a geologic formation in France. It preserves fossils dating back to the Late Jurassic period. Paleofauna *Allosauroidea indet. - possible metriacanthosaurid *''Leedsichthys'' *Megalosauridae indet. - Similar to ''Torvosaurus'' *''?Streptospondylus -'' tentative referral based on similarities with ''Eustreptospondylus'' (may not be from the formation) See also * List of fossiliferous stratigraphic units in France See also * Lists of fossiliferous stratigraphic units in Europe These lists of fossiliferous stratigraphic units in Europe enumerate the rock layers which preserve the fossilized remains of ancient life in Europe by the modern countries wher ... References * Jurassic France Jurassic System of Europe Oxfordian Stage [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness (geology), thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
