|
La Voulte-sur-Rhône
La Voulte-sur-Rhône (, literally ''La Voulte on Rhône''; ) is a commune in the Ardèche department in southern France. Population Lagerstätte La Voulte-sur-Rhône is a marine Lagerstätte (sedimentary deposit) located in France. It is Middle Jurassic (Callovian) in age, and is known for the variety of fossils it produces, including cephalopods, such as '' Proteroctopus ribeti'', '' Rhomboteuthis lehmani'', and ''Vampyronassa rhodanica''. Fossilized cephalopods are rare, and Voulte-sur-Rhône is prized among paleontologists as one of only a few known localities known to produce such cephalopod fossils. Fossil preservation is by pyrite, a geologically rare process. Other sites with pyrite preserved fossils are Beecher's Trilobite Bed and the Hunsrück Slate. see page 41 Also found at the site are ophiuroids, crustaceans, fish, and other pyritized specimens. The exceptional preservation of the fossils at this site is most likely due to the result of oxygen deficient wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communes Of France
A () is a level of administrative divisions of France, administrative division in the France, French Republic. French are analogous to civil townships and incorporated municipality, municipalities in Canada and the United States; ' in Germany; ' in Italy; ' in Spain; or civil parishes in the United Kingdom. are based on historical geographic communities or villages and are vested with significant powers to manage the populations and land of the geographic area covered. The are the fourth-level administrative divisions of France. vary widely in size and area, from large sprawling cities with millions of inhabitants like Paris, to small hamlet (place), hamlets with only a handful of inhabitants. typically are based on pre-existing villages and facilitate local governance. All have names, but not all named geographic areas or groups of people residing together are ( or ), the difference residing in the lack of administrative powers. Except for the Municipal arrondissem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vampyronassa Rhodanica
''Vampyronassa rhodanica'' ("vampire fish trap") is an extinction, extinct Vampyromorphida, vampyromorph cephalopod known from around 20 fossils from the Callovian, Lower Callovian (165–164 annum, Ma) of La Voulte-sur-Rhône (lagerstätte), La Voulte-sur-Rhône, Ardèche, France. Morphology ''Vampyronassa'' reached total length about . This taxon differs from the modern vampire squid in having longer first dorsal arms, a larger hyponome, and a more elongated mantle (mollusc), mantle. The original description noted possible Bioluminescence, luminous organs which a restudy could not confirm. It had eight arms with uniserial Sucker (zoology), suckers flanked by cirri, same as modern vampire squid. Retractile filaments that is known from modern vampire squid is not known in ''Vampyronassa''. Like vampire squid, ''Vampyronassa'' lacked an ink sac. Classification ''Vampyronassa'' shares some characters with modern vampire squid ''Vampyroteuthis'', such as lack of ink sac and uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communes Of The Ardèche Department
The following is a list of the 335 communes of the Ardèche department of France. The communes cooperate in the following intercommunalities (as of 2025):Périmètre des groupements en 2025 BANATIC. Accessed 28 May 2025. *Communauté d'agglomération Annonay Rhône Agglo
Annonay Rhône Agglo is the ''communauté d'agglomération'', an intercommunal structure, centred on the town of Annonay. It is located in the Ardèche department, in the Auvergne-Rhône-Alpes region, southern France. Created in 2017, its seat i ...
* [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxygen Deficient Water
Hypoxia (''hypo'': 'below', ''oxia'': 'oxygenated') refers to low oxygen conditions. Hypoxia is problematic for air-breathing organisms, yet it is essential for many anaerobic organisms. Hypoxia applies to many situations, but usually refers to the atmosphere and natural waters. Atmospheric hypoxia Atmospheric hypoxia occurs naturally at high altitudes. Total atmospheric pressure decreases as altitude increases, causing a lower partial pressure of oxygen, which is defined as hypobaric hypoxia. Oxygen remains at 20.9% of the total gas mixture, differing from hypoxic hypoxia, where the percentage of oxygen in the air (or blood) is decreased. This is common in the sealed burrows of some subterranean animals, such as blesmols. Atmospheric hypoxia is also the basis of altitude training, which is a standard part of training for elite athletes. Several companies mimic hypoxia using normobaric artificial atmosphere. Aquatic hypoxia An aquatic system lacking dissolved oxygen (0% sat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish
A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can be grouped into the more basal (phylogenetics), basal jawless fish and the more common jawed fish, the latter including all extant taxon, living cartilaginous fish, cartilaginous and bony fish, as well as the extinct placoderms and acanthodians. In a break to the long tradition of grouping all fish into a single Class (biology), class (Pisces), modern phylogenetics views fish as a paraphyletic group. Most fish are ectotherm, cold-blooded, their body temperature varying with the surrounding water, though some large nekton, active swimmers like white shark and tuna can hold a higher core temperature. Many fish can communication in aquatic animals#Acoustic, communicate acoustically with each other, such as during courtship displays. The stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthropods including decapods (shrimps, prawns, crabs, lobsters and crayfish), seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, opossum shrimps, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods (insects and entognathans) emerged deep in the Crustacean group, with the completed pan-group referred to as Pancrustacea. The three classes Cephalocarida, Branchiopoda and Remipedia are more closely related to the hexapods than they are to any of the other crustaceans ( oligostracans and multicrustaceans). The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brittle Star
Brittle stars, serpent stars, or ophiuroids (; ; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their flexible arms for locomotion. The ophiuroids generally have five long, slender, whip-like arms which may reach up to in length on the largest specimens. The Ophiuroidea contain two large clades, Ophiurida (brittle stars) and Euryalida (basket stars). Over 2,000 species of brittle stars live today. More than 1,200 of these species are found in deep waters, greater than 200 m deep. Range The ophiuroids diverged in the Early Ordovician. Ophiuroids can be found today in all of the major marine provinces, from the poles to the tropics. Basket stars are usually confined to the deeper parts of this range; Ophiuroids are known even from abyssal (>6,000 m) depths. However, brittle stars are also common members of reef communities, where they hide under rocks and even w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunsrück Slate
The Hunsrück () is a long, triangular, pronounced upland in Rhineland-Palatinate, Germany. It is bounded by the valleys of the Moselle-Saar (north-to-west), the Nahe (south), and the Rhine (east). It is continued by the Taunus mountains, past the Rhine and by the Eifel past the Moselle. To the south of the Nahe is a lower, hilly country forming the near bulk of the Palatinate region and all of the, smaller, Saarland. Below its north-east corner is Koblenz. As the Hunsrück proceeds east it acquires north-south width and three notable gaps in its southern ridges. In this zone are multi-branch headwaters including the Simmerbach ending at Simmertal on the southern edge. This interior is therefore rarely higher than above sea level. Peaks and escarpments are principally: the (Black Forest) Hochwald, the Idar Forest, the Soonwald, and the Bingen Forest. The highest mountain is the Erbeskopf (816 m; 2,677 ft), towards the region's south-west. Notable towns are Simmern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beecher's Trilobite Bed
Beecher's Trilobite Bed is a Konservat-Lagerstätte of Late Ordovician (Caradoc) age located within the Frankfort Shale in Cleveland's Glen, Oneida County, New York, USA.Martha Buck's senior thesis on the Beecher's Trilobite Bed Photos (and more) of trilobites from Beecher's Trilobite Bed from Yale Peabody Museum Only 3–4 centimeters thick, Beecher's Trilobite Bed has yielded numerous exceptionally preserved s with the ventral anatomy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrite
The mineral pyrite ( ), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of ''fool's gold''. The color has also led to the nicknames ''brass'', ''brazzle'', and ''brazil'', primarily used to refer to pyrite found in coal. The name ''pyrite'' is derived from the Greek (), 'stone or mineral which strikes fire', in turn from (), 'fire'. In ancient Roman times, this name was applied to several types of stone that would create sparks when struck against steel; Pliny the Elder described one of them as being brassy, almost certainly a reference to what is now called pyrite. By Georgius Agricola's time, , the term had become a generic term for all of the sulfide minerals. Pyrite is usually found associated with other sulfides or oxides in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology
Paleontology, also spelled as palaeontology or palæontology, is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geologic time, and assess the interactions between prehistoric organisms and their natural environment. While paleontological observations are known from at least the 6th century BC, the foundation of paleontology as a science dates back to the work of Georges Cuvier in 1796. Cuvier demonstrated evidence for the concept of extinction and how life of the past was not necessarily the same as that of the present. The field developed rapidly over the course of the following decades, and the French word ''paléontologie'' was introduced for the study in 1822, which was derived from the Ancient Greek word for "ancient" and words describing relatedness and a field of study. Further advances in the field accompanied the work of Charles Darwin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhomboteuthis Lehmani
''Rhomboteuthis lehmani'' is an extinct species of squid, currently the only described member of its genus. ''R. lehmani'' is known from the Lower Callovian (165–164 Ma) of Voulte-sur-Rhône, Ardèche, France. Radiography was used to locate the position of the ink sac and gladius ''Gladius'' () is a Latin word properly referring to the type of sword that was used by Ancient Rome, ancient Roman foot soldiers starting from the 3rd century BC and until the 3rd century AD. Linguistically, within Latin, the word also came t ... (pen) of the pictured specimen. References * Fischer, J.-C. & B. Riou 1982. Les teuthoïdes (Cephalopoda, Dibranchiata) du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). ''Annales de Paléontologie'' 68(4): 295–325. * Fischer, J.-C. 2003. Invertébrés remarquables du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). ''Annales de Paléontologie'' 89: 223–252. Jurassic cephalopods Squid Fossils of France ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
