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David A. T. Harper - One of the best experts on this subject based on the ideXlab platform.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
Joseph P. Botting - One of the best experts on this subject based on the ideXlab platform.
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Early Cambrian sponges of the Sirius Passet Biota, North Greenland
Papers in Palaeontology, 2016Co-Authors: Joseph P. Botting, John S. PeelAbstract:The Sirius Passet Biota of the Buen Formation in North Greenland is one of the key Burgess Shale-type faunas, as it represents the only diverse early Cambrian (Stage 2, Series 3) Biota from Laurent ...
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An Ordovician variation on Burgess Shale-type Biotas
Scientific reports, 2015Co-Authors: Joseph P. Botting, Lucy A. Muir, Naomi Jordan, Christopher UptonAbstract:The Cambrian Burgess Shale-type Biotas form a globally consistent ecosystem, usually dominated by arthropods. Elements of these communities continued into the Early Ordovician at high latitude, but our understanding of ecological changes during the Great Ordovician Biodiversification Event (GOBE) is currently limited by the paucity of Ordovician exceptionally preserved open-marine faunas. Here we clarify the early stages of the GOBE by describing a new open-marine Konservat-Lagerstatte from the Early Ordovician of Wales. The Afon Gam Biota includes many lineages typical of the Cambrian Burgess Shale-type Biotas, but the most abundant groups were sponges, algae and worms, with non-trilobite arthropods being unexpectedly rare. Labile tissues occur abundantly in the sponges and are also present in other groups, including brachiopods and hyoliths. Taphonomic biases are considered and rejected as explanations for arthropod rarity; the preserved Biota is considered to be an approximation to the original community composition. We note that other exceptionally preserved communities in the Welsh Ordovician are also sponge-dominated, suggesting a regional change in benthic ecology during the early stages of the GOBE.
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ordovician faunas of burgess shale type
Nature, 2010Co-Authors: Derek E. G. Briggs, Bertrand Lefebvre, Joseph P. Botting, Lucy A. Muir, Peter Van Roy, Patrick J Orr, Jakob Vinther, Khadija El HaririAbstract:The renowned soft-bodied faunas of the Cambrian period, which include the Burgess Shale, disappear from the fossil record in the late Middle Cambrian, after which the Palaeozoic fauna dominates. The disappearance of faunas of Burgess Shale type curtails the stratigraphic record of a number of iconic Cambrian taxa. One possible explanation for this loss is a major extinction, but more probably it reflects the absence of preservation of similar soft-bodied faunas in later periods. Here we report the discovery of numerous diverse soft-bodied assemblages in the Lower and Upper Fezouata Formations (Lower Ordovician) of Morocco, which include a range of remarkable stem-group morphologies normally considered characteristic of the Cambrian. It is clear that Biotas of Burgess Shale type persisted after the Cambrian and are preserved where suitable facies occur. The Fezouata Biota provides a link between the Burgess Shale communities and the early stages of the Great Ordovician Biodiversification Event.
Paul M Smith - One of the best experts on this subject based on the ideXlab platform.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
Timothy P. Topper - One of the best experts on this subject based on the ideXlab platform.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
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the sirius passet lagerstatte of north greenland a remote window on the cambrian explosion
Journal of the Geological Society, 2019Co-Authors: Jan A Rasmussen, Taeyoon Park, Timothy P. Topper, Emma U Hammarlund, Arne Thorshoj Nielsen, David A. T. Harper, Paul M SmithAbstract:The lower Cambrian Lagerstatte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved Biotas. The Lagerstatte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the Biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.
Derek E. G. Briggs - One of the best experts on this subject based on the ideXlab platform.
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The cuticle of the enigmatic arthropod Phytophilaspis and biomineralization in Cambrian arthropods
Lethaia, 2010Co-Authors: Andrey Yu. Ivantsov, Derek E. G. BriggsAbstract:Lin, J.-P., Ivantsov, A.Y. & Briggs, D.E.G. 2011: The cuticle of the enigmatic arthropod Phytophilaspis and biomineralization in Cambrian arthropods. Lethaia, Vol. 44, pp. 344–349. Many non-trilobite arthropods occur in Cambrian Burgess Shale-type (BST) Biotas, but most of these are preserved in fine-grained siliciclastics. Only one important occurrence of Cambrian non-trilobite arthropods, the Sinsk Biota (lower Sinsk Formation, Botomian) from the Siberian Platform, has been discovered in carbonates. The chemical compositions of samples of the enigmatic arthropod Phytophilaspis pergamenaIvantsov, 1999 and the co-occurring trilobite Jakutus primigenius Ivantsov in Ponomarenko, 2005 from this deposit were analysed. The cuticle of P. pergamena is composed of mainly calcium phosphate and differs from the cuticle of J. primigenius, which contains only calcium carbonate. Phosphatized cuticles are rare among large Cambrian arthropods, except for aglaspidids and a few trilobites. Based on recent phylogenetic studies, phosphatization of arthropod cuticle is likely to have evolved several times. □arthropod cuticle, Burgess Shale-type preservation, fossil-diagenesis, phosphatization.
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ordovician faunas of burgess shale type
Nature, 2010Co-Authors: Derek E. G. Briggs, Bertrand Lefebvre, Joseph P. Botting, Lucy A. Muir, Peter Van Roy, Patrick J Orr, Jakob Vinther, Khadija El HaririAbstract:The renowned soft-bodied faunas of the Cambrian period, which include the Burgess Shale, disappear from the fossil record in the late Middle Cambrian, after which the Palaeozoic fauna dominates. The disappearance of faunas of Burgess Shale type curtails the stratigraphic record of a number of iconic Cambrian taxa. One possible explanation for this loss is a major extinction, but more probably it reflects the absence of preservation of similar soft-bodied faunas in later periods. Here we report the discovery of numerous diverse soft-bodied assemblages in the Lower and Upper Fezouata Formations (Lower Ordovician) of Morocco, which include a range of remarkable stem-group morphologies normally considered characteristic of the Cambrian. It is clear that Biotas of Burgess Shale type persisted after the Cambrian and are preserved where suitable facies occur. The Fezouata Biota provides a link between the Burgess Shale communities and the early stages of the Great Ordovician Biodiversification Event.
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The Granton ‘shrimp-bed’, Edinburgh—a Lower Carboniferous Konservat-Lagerstätte
Transactions of the Royal Society of Edinburgh: Earth Sciences, 1991Co-Authors: Derek E. G. Briggs, Neil D L Clark, Euan N K ClarksonAbstract:ABSTRACTNewly discovered crustaceans from the Granton ‘shrimp-bed’ (Dinantian, Lower Oil Shale Group) are described: Bairdops elegans, Minicaris sp., Palaemysis, Tealliocaris cf. woodwardi, Pseudogalathea ornatissima, Anthracocaris scotica, Paraparchites cf. okeni, Beyrichiopsis plicata, and Eocypridina cf. aciculata, and new observations on Waterstonella grantonensis are reported. Tealliocaris woodwardi alone is recorded from bed o, a level ca 1 m below the ‘shrimp-bed’. The Granton ‘shrimp-bed’ Biota is reviewed—the geological and lithological context of the deposit, the distribution and taphonomy of the Biota, its life environment, palaeoecology, the likely causes of mortality, and comparisons are made with contemporaneous shrimp Biotas. The nature of this unusual Konservat-Lagerstätte reflects conditions in the sheltered, periodically emergent lagoon which it represents.
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The Granton "shrimp-bed", Edinburgh - a Lower Carboniferous Konservat-Lagerstatte
Transactions of The Royal Society of Edinburgh-earth Sciences, 1991Co-Authors: Derek E. G. Briggs, Neil D L Clark, Euan N K ClarksonAbstract:Newly discovered crustaceans from the Granton ‘shrimp-bed’ (Dinantian, Lower Oil Shale Group) are described: Bairdops elegans, Minicaris sp., Palaemysis, Tealliocaris cf. woodwardi, Pseudogalathea ornatissima, Anthracocaris scotica, Paraparchites cf. okeni, Beyrichiopsis plicata , and Eocypridina cf. aciculata , and new observations on Waterstonella grantonensis are reported. Tealliocaris woodwardi alone is recorded from bed o, a level ca 1 m below the ‘shrimp-bed’. The Granton ‘shrimp-bed’ Biota is reviewed—the geological and lithological context of the deposit, the distribution and taphonomy of the Biota, its life environment, palaeoecology, the likely causes of mortality, and comparisons are made with contemporaneous shrimp Biotas. The nature of this unusual Konservat-Lagerstatte reflects conditions in the sheltered, periodically emergent lagoon which it represents.
