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dc.contributor.author
Di Pasquo Lartigue, Maria
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dc.contributor.author
Grader, George W.
dc.contributor.author
Kondas, Marcelina
dc.contributor.author
Doughty, P. Ted
dc.contributor.author
Filipiak, Pawel
dc.contributor.author
Rice, Beverly J.
dc.contributor.author
Isaacson, Peter E.
dc.date.available
2021-12-09T11:04:12Z
dc.date.issued
2019-12
dc.identifier.citation
Di Pasquo Lartigue, Maria; Grader, George W.; Kondas, Marcelina; Doughty, P. Ted; Filipiak, Pawel; et al.; Lower Sappington Formation palynofacies in Montana confirm upper famennian black shale paleoenvironments and sequences across western North America; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 536; 12-2019; 1-19
dc.identifier.issn
0031-0182
dc.identifier.uri
http://hdl.handle.net/11336/148454
dc.description.abstract
For the first time, Late Devonian palynofacies analyses of the Lower Sappington shale units U1A─D was carried out at Peak 9559 (Sacajawea) and Ainger Lake in the Bridger Range of Montana. Diagnostic spore species Apiculiretusispora verrucosa, Diducites mucronatus and D. versabilis allowed the correlation of our U1A-D with the European Late Famennian A. verrucosa-V. hystricosus Palynozone. The first appearance of Gorgonisphaeridium winslowiae in U1 is the oldest record before the inception of Retispora lepidophyta. Four palynofacies correlative with U1A-D and new findings of invertebrates and microfossils allow the interpretation of paleoenvironmental changes. Amorphous organic matter, marine phytoplankton and pyrite in black shales of U1A-B indicate anoxic bottom conditions occurred in offshore marine environments. An erosional fossiliferous phosphatic lag above these units confirms a regional SB. U1C black shales composed by AOM, marine and terrestrial phytoplankton, land–derived remains and pyrite reveal shallower, dysoxic-anoxic, brackish water environments. A thin layer at the base of Unit 1D yielded AOM and marine phytoplankton and low terrestrial input indicating dysoxic-anoxic conditions were maintained. The lack of organic matter and the presence of invertebrates and microfossils in a thin green fossiliferous mudstone supports the establishment of normal, oxygenated marine conditions maintained in the basal Middle Sappington Member (U2). These two thin units are not part of the underlying anoxic black shale (U1A-B) sequence as commonly was over-simplified. Instead, they are part of a transgressive interval with the basal Middle Sappington. A correlation of the U1 shale interval is established with the global multiphase Dasberg Event.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANOXIA
dc.subject
BIOTIC CHANGES
dc.subject
BRIDGER RANGE
dc.subject
DASBERG EVENT
dc.subject
LOWER BAKKEN FORMATION
dc.subject
PALYNOLOGY
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Lower Sappington Formation palynofacies in Montana confirm upper famennian black shale paleoenvironments and sequences across western North America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-18T21:18:24Z
dc.journal.volume
536
dc.journal.pagination
1-19
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Di Pasquo Lartigue, Maria. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina
dc.description.fil
Fil: Grader, George W.. No especifíca;
dc.description.fil
Fil: Kondas, Marcelina. Universidad de Silesia; Polonia
dc.description.fil
Fil: Doughty, P. Ted. No especifíca;
dc.description.fil
Fil: Filipiak, Pawel. Universidad de Silesia; Polonia
dc.description.fil
Fil: Rice, Beverly J.. University of Idaho; Estados Unidos
dc.description.fil
Fil: Isaacson, Peter E.. University of Idaho; Estados Unidos
dc.journal.title
Palaeogeography, Palaeoclimatology, Palaeoecology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.palaeo.2019.109370
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018218311064
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