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Buen Formation
The Buen Formation is a geologic formation and Lagerstätte in Peary Land, North Greenland. The shale preserves fossils dating back to the Early Cambrian period (Atdabanian in the local timescale, about 520 to 513 Ma).Buen Formation at .org Description The oldest Cambrian series of the area was deposited in the and is poorly exposed in fragmentary, heavily metamorphosed outcrops in |
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 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 W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was created in 1998 by John Alroy and is housed at Macquarie University. It includes many analysis and data visualization tools formerly included in the Paleobiology Database.{{cite web, title=Frequently asked questions, url=http://www.fossilworks.org/cgi-bin/bridge.pl?page=FAQ, publisher=Fossilworks, access-date=17 December 2021 References {{Reflist External links {{Wikidata property, P842 * [Baidu] |
Kerygmachela
''Kerygmachela kierkegaardi'' is a gilled lobopodian from the Cambrian Stage 3 aged Sirius Passet Lagerstätte in northern Greenland. Its anatomy strongly suggests that it, along with its relative '' Pambdelurion whittingtoni'', was a close relative of radiodont (anomalocaridids) and euarthropods. The generic name "Kerygmachela" derives from the Greek words ''Kerygma'' (proclamation) and ''Chela'' (claw), in reference to the flamboyant frontal appendages. The specific name, "kierkegaardi" honors Danish philosopher Søren Kierkegaard. Morphology The head of ''Kerygmachela'' possesses a pair of well-developed frontal appendages which correspond to those of other dinocaridids and siberiid lobopodians. Each of them terminates in a series of long spines. A pair of sessile, slit-like compound eyes is located slightly behind the base of these appendages. A small anterior-facing mouth is located below the head and bears a pair of stylet-like structures. The head also possesse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aaveqaspis Inesoni
''Aaveqaspis'' is a genus of small (about long) marine arthropods of unclear affiliation, that lived during the early Cambrian period. Fossil remains of ''Aaveqaspis'' were collected from the Lower Cambrian Sirius Passet fossil-Lagerstätte of North Greenland. ''Aaveqaspis'' looks like a soft eyeless trilobite with a weakly defined axis, a headshield (or cephalon) with stubby genal spines, 5 thorax segments also ending in stubby genal spines, and a tailshield (pygidium) with a pair of massive tusk-like spines, and two smaller spines near the end of the axis. The only species presently known is ''A. inesoni'' (i.e. the genus is monotypic). Etymology The name of the genus is a compound of the Greenlandic word ' (walrus), reflecting the likeness of the tail spines to the tusks of a walrus, and the Greek word ' (shield). The species was named after Jon R. Ineson to honour him for his studies of the Cambrian of North Greenland. Description ''Aaveqaspis inesoni'' is almost flat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenellus
''Buenellus higginsi'' is an average size (about ) trilobite, which lived during the Lower Cambrian period, in what is now North-West Greenland. It is a prominent member of the Sirius Passet fauna. ''Buenellus higginsi'' is the only known species in the genus ''Buenellus'' (i.e., the genus is monotypic). Etymology The genus name is a contraction of Buen, from the formation in which it was first collected, and '' Olenellus'', a somewhat related trilobite genus. The species specific epithet honors A. Higgins, who discovered the Sirius Passet ' in 1984 during the Geological Survey of Greenland. Description The general outline of the body is rounded n the front third, parallel sided in the middle third, and progressively tapering backwards in the back third, ending at an angle of approximately 45° with the midline. The headshield (or cephalon is approximately ⅝× as long as it is wide. The (in this case only slightly) vaulted central axis of the head or glabella tapers gent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenaspis Drawing
''Buenaspis'' is a genus of small ( long) nektaspid arthropod, that lived during the early Cambrian period.Budd, G.E (1999).A Nectaspid Arthropod from the Early Cambrian Sirius Passet Fauna, with a description of Retrodeformation based on Functional Morphology. ''Palaeontology'', 42(1):99–122 Fossil remains of ''Buenaspis'' were collected from the Lower Cambrian Sirius Passet ''Lagerstätte'' of North Greenland. ''Buenaspis'' looks like a soft eyeless trilobite. It has a headshield (or cephalon) slightly larger than the tailshield (pygidium), and in between them six thoracic body segments (somites). The genus is monotypic, its sole species being ''Buenaspis forteyi''. Etymology The name of the genus is derived from the Buen Formation, the deposit where the species was collected, and the Greek word ''aspis'' (shield). The species was named in honor of Richard Fortey, a famed paleontologist. Description ''Buenaspis forteyi'' is between 1 and 3 cm along the axis, appr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenaspis
''Buenaspis'' is a genus of small ( long) nektaspid arthropod, that lived during the early Cambrian period.Budd, G.E (1999).A Nectaspid Arthropod from the Early Cambrian Sirius Passet Fauna, with a description of Retrodeformation based on Functional Morphology. ''Palaeontology'', 42(1):99–122 Fossil remains of ''Buenaspis'' were collected from the Lower Cambrian Sirius Passet '' Lagerstätte'' of North Greenland. ''Buenaspis'' looks like a soft eyeless trilobite. It has a headshield (or cephalon) slightly larger than the tailshield ( pygidium), and in between them six thoracic body segments ( somites). The genus is monotypic, its sole species being ''Buenaspis forteyi''. Etymology The name of the genus is derived from the Buen Formation, the deposit where the species was collected, and the Greek word ''aspis'' (shield). The species was named in honor of Richard Fortey, a famed paleontologist. Description ''Buenaspis forteyi'' is between 1 and 3 cm along ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arthropod cuticle, cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an exoskeleton, external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species. The haemocoel, an arthropod's internal cavity, through which its haemolymph – analogue of blood – circulates, accommodates its interior Organ (anatomy), organs; it has an open circulatory system. Like their exteriors, the internal or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phragmochaeta Canicularis
''Phragmochaeta canicularis'' is an extinct animal belonging to the annelids and lived in the Early Cambrian ( Atdabanian in the local timescale, about 520 million years ago).''Phragmochaeta canicularis'' at .org Fossils have only been found in the Buen Formation at the Sirius Passet Lagerstätte, Greenland and the animal is probably the first polychaete. Etymo ...
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Annelid
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polkorridoren Group
Polkorridoren (meaning "Polar Corridor" in Danish), formerly known as Nordpassagen, is a mountain pass in Peary Land, Greenland. Administratively it is part of the Northeast Greenland National Park Northeast Greenland National Park ( kl, Kalaallit Nunaanni nuna eqqissisimatitaq, da, Grønlands Nationalpark) is the world's largest national park and the 10th List of largest protected areas in the world, largest protected area (the only large .... In 1953 a geological expedition went through the Polkorridoren pass crossing the Roosevelt Range from south to north. The Polkorridoren Group is a geological formation named after the pass. Geography The pass is located in the central / western sector of the Roosevelt Range, east of Gertrud Rask Land. It runs from north to south between the glacial valley of Sands Fjord to the north and the valley of Frigg Fjord to the south. Helvetia Tinde rises to the west. See also * Nordpasset * Sirius Passet References {{Reflist Extern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
