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Ahbach Formation
The Ahbach Formation is a Formation (geology), geologic formation in Germany. It preserves fossils dating back to the Middle Devonian Period (geology), period. Fossil content The formation has provided among others the following fossils: at Fossilworks.org * ''Alveolites, Alveolites intermixtus'' * ''Aulopora, Aulopora serpens'' * ''Favosites, Favosites saginatus'' * ''Heliolites, Heliolites porosus'' * ''Pachytheca, Pachytheca stellimicans'' * ''Platyaxum, Platyaxum (Platyaxum) escharoides'' * ''Platyaxum, Platyaxum (Egosiella) clathratum'' * ''Pseudopalaeoporella, Pseudopalaeoporella lummatonensis'' * ''Thamnophyllum, Thamnophyllum caespitosum'' * ''Thamnopora, Thamnopora nicholsoni'' * ''Thamnopora, Thamnopora cf. dubia'' * ''Cupressocrinites, Cupressocrinites sp.'' * ''Girvanella, Girvanella sp.'' * ' ... [...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] |
Favosites
''Favosites'' is an extinct genus of tabulate coral characterized by polygonal closely packed corallites (giving it the common name "honeycomb coral"). The walls between corallites are pierced by pores known as mural pores which allowed transfer of nutrients between polyps. ''Favosites'', like many corals, thrived in warm sunlit seas, feeding by filtering microscopic plankton with their stinging tentacles and often forming part of reef complexes. The genus had a worldwide distribution from the Late Ordovician to Late Permian. Distribution ''Favosites'' had a vast distribution, and its fossils can be found on every continent (except Antarctica). Species The following species of ''Favosites'' have been described:''Favosites'' at |
List Of Fossiliferous Stratigraphic Units In Germany
See also * Lists of fossiliferous stratigraphic units in Europe * Geology of Germany References * {{DEFAULTSORT:Fossiliferous stratigraphic units in Germany Germany Germany geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilobite
Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most successful of all early animals, existing in oceans for almost 270million years, with over 22,000 species having been described. Because trilobites had wide diversity and an easily fossilized mineralised exoskeleton made of calcite, they left an extensive fossil record. The study of their fossils has facilitated important contributions to biostratigraphy, paleontology, evolution, evolutionary biology, and plate tectonics. Trilobites are placed within the clade Artiopoda, which includes many organisms that are morphologically similar to trilobites, but are largely unmineralised. The relationship of Artiopoda to other arthropods is uncertain. Trilobites evolved into many ecological niches; some moved over the seabed as predators, scavengers, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerocodium
''Sphaerocodium'' is a fossil that represents the remains of bacteria in the phylum Cyanobacteria, often called ''blue-green algae''. The species of ''Sphaerocodium'' recorded by the author Rothpletz could be symbiotic intergrowths of different encrusting organisms. Two genera ('' Rothpletzella'' and '' Wetheredella'') were proposed in 1948 by Alan Wood to include these forms in two species from the Silurian of Gotland. These acts have sometimes been misinterpreted as dividing ''Sphaerocodium'' into two genera and treating ''Sphaerocodium'' as a synonym of ''Rothpletzella'', whereas in fact ''Sphaerocodium'' is still considered a valid genus. ''Sphaerocodium'' is characterised by having dichotomously-branching tubular filaments made of calcite, which formed encrusting masses on objects. These filaments branch in a fanlike pattern but remain in contact with each other; each filament is approximately 40-100μm wide and 30-50μ high. Filaments are not divided by septa. ''Sphaeroc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Girvanella
''Girvanella'' is a fossil thought to represent the calcified sheath of a filamentous cyanobacterium known from the Burgess Shale and other Cambrian fossil deposits. Specimens are also known from the Early Ordovician San Juan Formation, Argentina. ''Girvanella'' was originally described as a foraminifera. It was later assigned to the now-obsolete family porostromata. In 2020, it was assigned to the order Oscillatoriales. ''Girvanella'' is characterised by having flexing, tubular filaments with a uniform diameter usually between 10 and 30 microns (rarely up to 100 microns). The walls of these tubules are relatively thick and calcareous. These tubules are typically (but not always) twisted together into nodules, and often encrust other objects including foraminifera. Fossils of ''Girvanella'' are found from the Cambrian through the Cretaceous. ''Girvanella'' fossils are found in a wide range of environmental conditions, most commonly shallow-shelf carbonate facies, but also in n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupressocrinites
''Cupressocrinites'' is an extinct genus of crinoids from the Middle to Late Devonian of Asia, Australia, Europe, Morocco, and North America. References External links ''Cupressocrinites''in the Paleobiology Database The Paleobiology Database (PBDB) is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database originated in the NCEAS-funded Phanerozoic Marine Pale ... Cladida Prehistoric crinoid genera Devonian crinoids Devonian echinoderms of Asia Devonian echinoderms of Oceania Devonian echinoderms of Europe Devonian echinoderms of North America Middle Devonian first appearances Late Devonian animals Late Devonian genus extinctions {{paleo-crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
