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Campbellton Formation
The Campbellton Formation is a geologic formation in New Brunswick. It preserves fossils dating back to the latest Pragian and Emsian of the Devonian period. Description The Campbellton Formation is the southernmost representative of the Gaspé Sandstones group and can be divided into 6 facies associations (restricted lacustrine, marginal lacustrine, near-shore lacustrine, coastal-deltaic, sandy to gravelly alluvial plain, and gravelly proximal alluvial environments), and is nearly a kilometer thick. Lacustrine facies are prevalent in the lower parts of the eastern belt (representing a large open lake) while upper parts of the formation are dominated by alluvial facies (representing an eastward-flowing axial braided river A braided river, or braided channel, consists of a network of river channels separated by small, often temporary, islands called braid bars or, in English usage, ''aits'' or ''eyots''. Braided streams tend to occur in rivers with high sediment l ... system). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 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 Abraham Gottlob Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheiracanthus Murchisoni Life Restoration
''Cheiracanthus'' (from el, χείρ , 'hand' and el, ἄκανθα , 'spine') is an extinct genus of a group of fish called Acanthodii (or "spiny sharks"). It was a deep-bodied acanthodian about 12 in. (30 cm) in length. It had a blunt head, upturned tail, and fins protected by spines. Unlike many other acanthodians, it had one, solitary dorsal fin. ''Cheiracanthus'' swam at mid-depth in lakes and rivers, seizing small prey in its gaping jaws. Whole fossils of this fish occur only in Mid-Devonian rocks in Scotland, but its distinctive small, ornamented scales crop up around the world, as far south as Antarctica. See also * List of acanthodians This list of acanthodian genera is an attempt to create a comprehensive listing of all genera that have ever been included in the subclass Acanthodii, excluding purely vernacular terms. The list includes all commonly accepted genera, but also gen ... References Acanthodii genera Devonian fish of Antarctica Devonian fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ostracoderm
Ostracoderms () are the armored jawless fish of the Paleozoic Era. The term does not often appear in classifications today because it is paraphyletic (excluding jawed fishes) (may also be polyphyletic if anaspids are closer to cyclostomes) and thus does not correspond to one evolutionary lineage. However, the term is still used as an informal way of loosely grouping together the armored jawless fishes. An innovation of ostracoderms was the use of gills not for feeding, but exclusively for respiration. Earlier chordates with gill precursors used them for both respiration and feeding. Ostracoderms had separate pharyngeal gill pouches along the side of the head, which were permanently open with no protective operculum. Unlike invertebrates that use ciliated motion to move food, ostracoderms used their muscular pharynx to create a suction that pulled small and slow moving prey into their mouths. Swiss anatomist Louis Agassiz received some fossils of bony armored fish from Scotland ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campbellton, New Brunswick
Campbellton is a city in Restigouche County, New Brunswick, Canada. Situated on the south bank of the Restigouche River opposite Pointe-à-la-Croix, Quebec, Campbellton was officially incorporated in 1889 and achieved city status in 1958. Forestry and tourism are major industries in the regional economy, while a pulp mill in the Campbellton community of Atholville is the largest single employer in the area. As part of the tourism "industry", wealthy sportfishermen seeking Atlantic salmon flock to the scenic Restigouche Valley every summer. The region sees extensive annual snowfall. Alpine and Nordic ski facilities at Sugarloaf Provincial Park provide winter recreation opportunities for both visitors and local residents. Campbellton is also a local retail and service centre. On 1 January 2023, Campbellton amalgamated with the villages of Atholville and Tide Head, the local service district (LSD) of Glencoe and parts of four other LSDs. The names of the annexed communities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Restigouche River
The Restigouche River (french: Rivière Ristigouche) is a river that flows across the northwestern part of the province of New Brunswick and the southeastern part of Quebec. The river flows in a northeasterly direction from its source in the Appalachian Mountains of northwestern New Brunswick to Chaleur Bay. Its meander length is approximately . The Restigouche is fed by several tributaries flowing south from Quebec's Notre Dame Mountains on the western edge of the Gaspé Peninsula (Kedgwick River, Gounamitz River, Patapédia River, and Matapedia River) as well as the Upsalquitch River flowing north from New Brunswick's ''Chaleur Uplands''. Located mostly in New Brunswick, the river forms the inter-provincial boundary between the two provinces from its confluence with the Patapédia River to its mouth at Dalhousie, New Brunswick and Miguasha, Quebec where it discharges into Chaleur Bay. The estuary is in length, extending from the river's discharge point at Dalhousie in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battery Point Formation
The Battery Point Formation is a geologic formation in Quebec. It preserves fossils dating back to the early Emsian to early Eifelian the lower Devonian period. Description A part of the Gaspé Sandstones, the Battery Point Formation is believed to have been deposited in a fluvial environment based on the presence of rootlets as well as the abundance of trough and planar-tabular cross bedding, and the lower part resembles modern braided systems more than meandering systems. It rests unconformably on the shallow marine sandstones of the York River Formation (the basal unit of the Gaspé Sandstones and making the Battery Point Formation the first continental unit of the sequence), transitioning upwards into the Malbaie Formation, and is 2,300 meters (7,550 feet) thick. Fossil content Limited intervals in the lower part of the formation contain remains of a few brachiopods and bivalves Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
York River Formation
The York River Formation is a geologic formation in Quebec. It preserves fossils dating back to the Devonian period. Description The basal unit of the Gaspé Sandstones, the York River Formation is wholly marine and the Battery Point Formation rests unconformably above it. Fossil content Vertebrates Invertebrates See also * List of fossiliferous stratigraphic units in Quebec This is a list of fossiliferous stratigraphic units in Quebec, Canada. References * {{Lists of fossiliferous stratigraphic units in Canada Quebec Quebec ( ; )According to the Canadian government, ''Québec'' (with the acute accen ... References * Devonian Quebec Oil shale in Canada Oil shale formations {{Quebec-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fin Spine
Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish. The anatomy of fish is often shaped by the physical characteristics of water, the medium in which fish live. Water is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does. The body of a fish is divided into a head, trunk and tail, although the divisions between the three are not always externally visible. The skeleton, which forms the support structure inside the fish, is either made of cartilage ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
