Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia
The Grebenka flora, from the main exposure of the Albian-Cenomanian Krivorechenskaya Formation in northeastern Russia, represents a range of plant communities from pioneer to mature forest that grew close to the mid-Cretaceous North Pole (> 72degreesN). The diversity of this flora is dominated by...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Online Access: | https://lup.lub.lu.se/record/333622 https://doi.org/10.1016/S0031-0182(02)00247-X |
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ftulundlup:oai:lup.lub.lu.se:b9b064bf-b76f-4527-8150-f6063258f3a5 2023-05-15T15:10:02+02:00 Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia Spicer, RA Ahlberg, Anders Hermana, AB Kelley, SP Raikevich, MI Rees, PM 2002 https://lup.lub.lu.se/record/333622 https://doi.org/10.1016/S0031-0182(02)00247-X eng eng Elsevier https://lup.lub.lu.se/record/333622 http://dx.doi.org/10.1016/S0031-0182(02)00247-X wos:000176723600003 scopus:0036681677 Palaeogeography, Palaeoclimatology, Palaeoecology; 184(1-2), pp 65-105 (2002) ISSN: 1872-616X Geology palaeoecology palaeoenvironment palaeobotany Cretaceous northeastern Russia palaeoclimate contributiontojournal/article info:eu-repo/semantics/article text 2002 ftulundlup https://doi.org/10.1016/S0031-0182(02)00247-X 2023-02-01T23:32:53Z The Grebenka flora, from the main exposure of the Albian-Cenomanian Krivorechenskaya Formation in northeastern Russia, represents a range of plant communities from pioneer to mature forest that grew close to the mid-Cretaceous North Pole (> 72degreesN). The diversity of this flora is dominated by angiosperms followed by conifers, ferns and other plant groups. The age is constrained by Ar-40/Ar-39 analyses of associated volcaniclastics (similar to 96.5 Ma), coupled with biostratigraphic correlation of the plant-bearing non-marine beds with marine units of the Krivorechenskaya Formation and the overlying Dugovskaya Formation. Limited palaeosol development and pronounced episodic floodplain aggradation indicate that the 100-m-thick plant-bearing volcaniclastic floodplain succession was deposited rapidly, resulting in excellent trapping and preservation of the plant communities, but dilution of the palynoflora. Analysis of the megaflora (> 100 foliage taxa, plus woods and fructifications) provides a 'snapshot' of the mid-Cretaceous climate, and offers reliable quantitative climatic signals of conditions near the mid-Cretaceous North Pole. Multivariate analysis of leaf physiognomy (Climate Leaf Analysis Multivariate Program) on the whole flora suggests that the plants experienced a mean annual temperature of 13.0 +/- 1.8degreesC and a cold month mean temperature of 5.5 +/- 3.3degreesC. However, analyses of individual florules yield slightly different results that help constrain the uncertainties inherent in such an approach. These and other foliar physiognomic data are compared across the Arctic. Article in Journal/Newspaper Arctic North Pole Lund University Publications (LUP) Arctic Grebenka ENVELOPE(168.987,168.987,64.742,64.742) North Pole Palaeogeography, Palaeoclimatology, Palaeoecology 184 1-2 65 105 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology palaeoecology palaeoenvironment palaeobotany Cretaceous northeastern Russia palaeoclimate |
spellingShingle |
Geology palaeoecology palaeoenvironment palaeobotany Cretaceous northeastern Russia palaeoclimate Spicer, RA Ahlberg, Anders Hermana, AB Kelley, SP Raikevich, MI Rees, PM Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
topic_facet |
Geology palaeoecology palaeoenvironment palaeobotany Cretaceous northeastern Russia palaeoclimate |
description |
The Grebenka flora, from the main exposure of the Albian-Cenomanian Krivorechenskaya Formation in northeastern Russia, represents a range of plant communities from pioneer to mature forest that grew close to the mid-Cretaceous North Pole (> 72degreesN). The diversity of this flora is dominated by angiosperms followed by conifers, ferns and other plant groups. The age is constrained by Ar-40/Ar-39 analyses of associated volcaniclastics (similar to 96.5 Ma), coupled with biostratigraphic correlation of the plant-bearing non-marine beds with marine units of the Krivorechenskaya Formation and the overlying Dugovskaya Formation. Limited palaeosol development and pronounced episodic floodplain aggradation indicate that the 100-m-thick plant-bearing volcaniclastic floodplain succession was deposited rapidly, resulting in excellent trapping and preservation of the plant communities, but dilution of the palynoflora. Analysis of the megaflora (> 100 foliage taxa, plus woods and fructifications) provides a 'snapshot' of the mid-Cretaceous climate, and offers reliable quantitative climatic signals of conditions near the mid-Cretaceous North Pole. Multivariate analysis of leaf physiognomy (Climate Leaf Analysis Multivariate Program) on the whole flora suggests that the plants experienced a mean annual temperature of 13.0 +/- 1.8degreesC and a cold month mean temperature of 5.5 +/- 3.3degreesC. However, analyses of individual florules yield slightly different results that help constrain the uncertainties inherent in such an approach. These and other foliar physiognomic data are compared across the Arctic. |
format |
Article in Journal/Newspaper |
author |
Spicer, RA Ahlberg, Anders Hermana, AB Kelley, SP Raikevich, MI Rees, PM |
author_facet |
Spicer, RA Ahlberg, Anders Hermana, AB Kelley, SP Raikevich, MI Rees, PM |
author_sort |
Spicer, RA |
title |
Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
title_short |
Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
title_full |
Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
title_fullStr |
Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
title_full_unstemmed |
Palaeoenvironment and ecology of the middle Cretaceous Grebenka flora of northeastern Asia |
title_sort |
palaeoenvironment and ecology of the middle cretaceous grebenka flora of northeastern asia |
publisher |
Elsevier |
publishDate |
2002 |
url |
https://lup.lub.lu.se/record/333622 https://doi.org/10.1016/S0031-0182(02)00247-X |
long_lat |
ENVELOPE(168.987,168.987,64.742,64.742) |
geographic |
Arctic Grebenka North Pole |
geographic_facet |
Arctic Grebenka North Pole |
genre |
Arctic North Pole |
genre_facet |
Arctic North Pole |
op_source |
Palaeogeography, Palaeoclimatology, Palaeoecology; 184(1-2), pp 65-105 (2002) ISSN: 1872-616X |
op_relation |
https://lup.lub.lu.se/record/333622 http://dx.doi.org/10.1016/S0031-0182(02)00247-X wos:000176723600003 scopus:0036681677 |
op_doi |
https://doi.org/10.1016/S0031-0182(02)00247-X |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
184 |
container_issue |
1-2 |
container_start_page |
65 |
op_container_end_page |
105 |
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1766341103213084672 |