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Forbes Shale
The Forbes Shale is a geologic formation in the Sacramento Valley of northern California, United States. It is found in the Sutter Buttes area of Sutter County, California. It preserves fossils dating back to the Coniacian stage of the Late Cretaceous period.Forbes Shale at .org Fossil content The following fossils were reported from the formation:Anderson, 1958 ;Bivalves * '''' * ''Glycymerita veatchii'' * ''[...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] |
Pseudomelania
†''Pseudomelania'' is an extinct genus of fossil sea snails, marine gastropod mollusks in the family Pseudomelaniidae. Species Species within the genus ''Pseudomelania'' include: subgenus '' Hudlestoniella'' * ''Pseudomelania'' (''Hudlestoniella'') ''gubleri'' Delpey, 1941 subgenus '' Oonia'' - synonym: ''Eligmoloxus'' Cossmann, 1885"†''Pseudomelania'' Pictet and Campiche 1862 (snail)" Fossilworks, accessed 11 June 2016. * ''Oonia incrassata'' Kittl, 1899 * ''Oonia pennina'' Parona, 1892 * ''Oonia subtortilis'' Münster, 1841 * ''Oonia texta'' Kittl, 1899 * ''Pseudomelania'' (''Oonia'') ''grossouvrei'' Cossmann, 1899 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Cretaceous Series Of North America
Upper may refer to: * Shoe upper or ''vamp'', the part of a shoe on the top of the foot * Stimulant, drugs which induce temporary improvements in either mental or physical function or both * ''Upper'', the original film title for the 2013 found footage film ''The Upper Footage ''The Upper Footage'' (also known as ''Upper'') is a 2013 found footage film written and directed by Justin Cole. First released on January 31, 2013 to a limited run of midnight theatrical screenings at Landmark’s Sunshine Cinema in New York Cit ...'' See also {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Formations Of California
Geology () is a branch of natural science concerned with Earth and other Astronomical object, astronomical objects, the features or rock (geology), rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth science, Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the Relative dating, relative and Geochronology, absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Eart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In California
This article contains a list of fossil-bearing stratigraphic units in the state of California, California, U.S. Sites See also * Paleontology in California References * {{DEFAULTSORT:Fossiliferous stratigraphic units in California Fossiliferous stratigraphic units of the United States, California Paleontology in California, Stratigraphic units Stratigraphy of California, Fossiliferous stratigraphic units California geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hauericeras
''Hauericeras'' is an ammonite genus from the Late Cretaceous that lived from the Coniacian to the late Maastrichtian, from about 90 to 66 mya. Fossils have been found in Europe, Russia, South Africa, Australia, India, Iraq, and in the United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie .... The shell of ''Haericeras'' is subinvolute with the outer whorl covering much of the inner, but leaving part of the inner whorls exposed. Whorls are smooth with narrow periodic constructions. Whorl section is laterally compressed, flanks gently bowed, venter sharp. The suture is strongly ammonitic. The genus '' Oiophyllites'' may be related. Species * ''Hauericeras gardeni'' * ''Hauericeras pseudogardeni'' * ''Hauericeras sulcatum'' References *W. Arkell ''et al.'', 1957. Mesozoi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puzosia
''Puzosia'' is a genus of desmoceratid ammonites, and the type genus for the Puzosiinae, which lived during the middle part of the Cretaceous, from early Aptian to Maastrichtian (125.5 to 70.6 Ma). The generic name comes from the Serbian words "Puž" (snail) and "oce/ose" (axis), gaining its name from the shell's snail-like appearance. Subgenera and species * '' Puzosia (Anapuzosia)'' Matsumoto 1954 * '' Puzosia (Bhimaites)'' Matsumoto 1954 ** ''Puzosia (Bhimaites) bhima'' Stoliczka 1865 * '' Puzosia (Puzosia)'' Bayle 1878 ** ''Puzosia (Puzosia) mayoriana'' d'Orbigny 1841 ** ''Puzosia (Puzosia) planulatus'' Sowerby 1827 ** ''Puzosia alaskana'' Imlay 1960 ** ''Puzosia bistricta'' White 1887 ** ''Puzosia brasiliana'' Maury 1936 ** ''Puzosia crebrisulcata'' Kossmat 1898 ** ''Puzosia dilleri'' Anderson 1902 ** ''Puzosia garajauana'' Maury 1936 ** ''Puzosia lata'' Seitz 1931 ** ''Puzosia longmani'' Whitehouse 1926 ** ''Puzosia lytoceroides'' Haas 1952 ** ''Puzosia media'' Seitz 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lytoceras
''Lytoceras'' is an ammonite genus that was extant during most of the Jurassic and Cretaceous periods, and is the type genus for the family Lytoceratidae. These cephalopods were fast-moving nektonic carnivores. Description Shells of ''Lytoceras'' are evolute, round or quadrate in section, covered with crinkled growth lines or riblets, and may have slight constrictions on internal molds. Some have fine striations, (parallel grooves running longitudinally along the flanks). Distribution Fossils of species within this genus have been found in the Jurassic and Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ... rocks all over the world, particularly in Western Europe, Morocco, Madagascar, South Africa and United States. References *Systematic descriptions, Mesozoic Ammo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutrephoceras
''Eutrephoceras'' is an extinct genus of nautilus from the Late Jurassic to the Miocene (around 161 to 5 million years ago). They are characterized by a highly rounded involute shell with slightly sinuous suture patterns. Description ''Eutrephoceras'' typically possess nearly globular conchs (shells). The whorls are reniform (kidney-shaped) in cross section and broadly rounded on the sides and lower edge. On the upper edge it is only slightly curved. The surface of the shell is usually smooth, but can sometimes be sculptured. The suture patterns are slightly sinuous, though it can be more or less straight in some species. The umbilicus is small and barely noticeable, sometimes hidden altogether. The septa are averagely convex towards the tip. The siphuncle is small and circular in cross section. It can vary in position considerably and its placement is important in identifying different species under the genus, but it is never marginal. Puncture marks made by teeth on severa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupachydiscus
''Eupachydisus'' is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia. The whorl section in ''Eupachydiscus'' is inflated and depressed, almost round in the later growth stages. Ribs are narrow but prominent in the early whorls, becoming thick and strong in the later. ''Eupachydiscus'' is distinct from the mostly later, Campanian - Maastrichtian, compressed and high-whorled ''Pachydiscus'', but somewhat similar to the coeval, inflated and coarse ribbed, Coniacian-Santonian The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The ..., '' Pachydiscoides'' Species * '' Eupachydiscus isculensis'' † Redtenbacher 1873 * '' Eupachydiscus macoveii'' † Szaisz 1981 * '' E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmophyllites
''Desmophyllites'' is a small desmoceratitid ammonite characterized by a smooth and very involute shell that lived during the Santonian to Maachstrictian stages of the Late Cretaceous. Shells of ''Desmophylites diphylloida'' from the upper Santonian are on order of 1.8 cm (0.7 in) in diameter. Those of ''Desmophylllites larteti'' from the upper Campanian are on order of 10.5 cm (~4 in) across. References * Arkell, et al, 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ..., Part L (L370-371). Geological Society of America. * ''Desmophyllites'' iDesmoceratinae {{Taxonbar, from=Q16466651 Cretaceous ammonites Ammonites of Europe Ammonitida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baculites
''Baculites'' ("walking stick rock") is an extinct genus of cephalopods with a nearly straight shell, included in the heteromorph ammonites. The genus, which lived worldwide throughout most of the Late Cretaceous, and which briefly survived the K-Pg mass extinction event, was named by Lamarck in 1799. Life Shell anatomy The adult shell of ''Baculites'' is generally straight and may be either smooth or with sinuous striae or ribbing that typically slant dorso-ventrally forward. The aperture likewise slopes to the front and has a sinuous margin. The venter is narrowly rounded to acute while the dorsum is more broad. The juvenile shell, found at the apex, is coiled in one or two whorls and described as minute, about in diameter. Adult ''Baculites'' ranged in size from about (''Baculites larsoni'') up to in length. As with other ammonites, the shell consisted of a series of camerae, or chambers, that were connected to the animal by a narrow tube called a siphuncle by which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_-_Strasbourg_specimen.jpg "Click for more on -> Eutrephoceras")
