Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene
The study focuses on occurrences of Ophiomorpha burrows in a transgressive–regressive succession composing the Early Paleocene Firkanten Formation deposited in paralic, prodelta to delta front conditions in the Central Basin of Spitsbergen. The burrows colonize sandstones of the Todalen Member at fo...
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Norwegian Polar Institute
2016
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ftdoajarticles:oai:doaj.org/article:a3746fafec924fa2a0455cdeb2fa9ab7 2023-05-15T18:02:41+02:00 Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene Jenȍ Nagy Francisco J. Rodríguez Tovar Matías Reolid 2016-04-01T00:00:00Z https://doi.org/10.3402/polar.v35.24192 https://doaj.org/article/a3746fafec924fa2a0455cdeb2fa9ab7 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/24192/pdf_70 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.24192 https://doaj.org/article/a3746fafec924fa2a0455cdeb2fa9ab7 Polar Research, Vol 35, Iss 0, Pp 1-15 (2016) Trace fossils Paleocene shoreface sandstones brackish water transgression signal Environmental sciences GE1-350 Oceanography GC1-1581 article 2016 ftdoajarticles https://doi.org/10.3402/polar.v35.24192 2022-12-31T02:57:20Z The study focuses on occurrences of Ophiomorpha burrows in a transgressive–regressive succession composing the Early Paleocene Firkanten Formation deposited in paralic, prodelta to delta front conditions in the Central Basin of Spitsbergen. The burrows colonize sandstones of the Todalen Member at four sites and belong to two ichnospecies: Ophiomorpha cf. nodosa, forming dominantly vertical shafts; and O. cf. irregulaire, consisting of horizontal sinuous tunnels ending in subconical shafts. Both species are observed in shoreface sandstones deposited as a barrier bar. Lithological features and stratigraphic positions suggest that the trace-makers preferentially colonized high-energy sand environments. Foraminiferal faunas occurring below and above the barrier sandstones indicate brackish water conditions for the Ophiomorpha levels, which accordingly are of restricted, monospecific nature. It is inferred that the trace-makers had a dominantly suspension feeding habit as a modern analogue Calianassa major. Portrayed in a sequence stratigraphic framework, the Ophiomorpha-bearing sandstones in middle reaches of the Central Basin were deposited in the final stage of the transgressive systems tract, which drowned the underlying coal-bearing paralic facies. Moreover, in the northern, coal-rich parts of the basin, occurrence of Ophiomorpha signals marine ingression into the paralic system. Article in Journal/Newspaper Polar Research Spitsbergen Directory of Open Access Journals: DOAJ Articles Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Todalen ENVELOPE(8.716,8.716,62.814,62.814) Polar Research 35 1 24192 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Trace fossils Paleocene shoreface sandstones brackish water transgression signal Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Trace fossils Paleocene shoreface sandstones brackish water transgression signal Environmental sciences GE1-350 Oceanography GC1-1581 Jenȍ Nagy Francisco J. Rodríguez Tovar Matías Reolid Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
topic_facet |
Trace fossils Paleocene shoreface sandstones brackish water transgression signal Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The study focuses on occurrences of Ophiomorpha burrows in a transgressive–regressive succession composing the Early Paleocene Firkanten Formation deposited in paralic, prodelta to delta front conditions in the Central Basin of Spitsbergen. The burrows colonize sandstones of the Todalen Member at four sites and belong to two ichnospecies: Ophiomorpha cf. nodosa, forming dominantly vertical shafts; and O. cf. irregulaire, consisting of horizontal sinuous tunnels ending in subconical shafts. Both species are observed in shoreface sandstones deposited as a barrier bar. Lithological features and stratigraphic positions suggest that the trace-makers preferentially colonized high-energy sand environments. Foraminiferal faunas occurring below and above the barrier sandstones indicate brackish water conditions for the Ophiomorpha levels, which accordingly are of restricted, monospecific nature. It is inferred that the trace-makers had a dominantly suspension feeding habit as a modern analogue Calianassa major. Portrayed in a sequence stratigraphic framework, the Ophiomorpha-bearing sandstones in middle reaches of the Central Basin were deposited in the final stage of the transgressive systems tract, which drowned the underlying coal-bearing paralic facies. Moreover, in the northern, coal-rich parts of the basin, occurrence of Ophiomorpha signals marine ingression into the paralic system. |
format |
Article in Journal/Newspaper |
author |
Jenȍ Nagy Francisco J. Rodríguez Tovar Matías Reolid |
author_facet |
Jenȍ Nagy Francisco J. Rodríguez Tovar Matías Reolid |
author_sort |
Jenȍ Nagy |
title |
Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
title_short |
Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
title_full |
Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
title_fullStr |
Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
title_full_unstemmed |
Environmental significance of Ophiomorpha in a transgressive–regressive sequence of the Spitsbergen Paleocene |
title_sort |
environmental significance of ophiomorpha in a transgressive–regressive sequence of the spitsbergen paleocene |
publisher |
Norwegian Polar Institute |
publishDate |
2016 |
url |
https://doi.org/10.3402/polar.v35.24192 https://doaj.org/article/a3746fafec924fa2a0455cdeb2fa9ab7 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) ENVELOPE(8.716,8.716,62.814,62.814) |
geographic |
Burrows Todalen |
geographic_facet |
Burrows Todalen |
genre |
Polar Research Spitsbergen |
genre_facet |
Polar Research Spitsbergen |
op_source |
Polar Research, Vol 35, Iss 0, Pp 1-15 (2016) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/24192/pdf_70 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.24192 https://doaj.org/article/a3746fafec924fa2a0455cdeb2fa9ab7 |
op_doi |
https://doi.org/10.3402/polar.v35.24192 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
24192 |
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1766173151717228544 |