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Río Banano Formation
The Río Banano Formation is a geologic formation in Costa Rica of the Limón Group. It preserves fossils dating back to the Middle Miocene to Piacenzian period. Fossil content * '' Aphera bananensis'' * ''Isopisthus acer ''Isopisthus'' is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. These fishes are found in the western Atlantic and eastern Pacific Oceans. Taxonomy ''Isopisthus'' Was first proposed as a monospecif ...'' * '' Pacuarescarus''Laurito et al., 2014 See also * List of fossiliferous stratigraphic units in Costa Rica References Bibliography * * * {{DEFAULTSORT:Rio Banano Formation Geologic formations of Costa Rica Neogene Costa Rica Sandstone formations Siltstone formations Shale formations Deltaic deposits Shallow marine deposits Formations ... [...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] |
