The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin

Strata exposed near Tabbowa Tank, Tabbowa Basin, western Sri Lanka have yielded the first representatives of the distinctive Permian Glossopteris flora from that country. The assemblage includes gymnosperm foliage attributable to Glossopteris raniganjensis, roots referable to Vertebraria australis,...

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Published in:Geological Magazine
Main Authors: Edirisooriya, Geetha, Dharmagunawardhane, H.A., McLoughlin, Stephen
Format: Article in Journal/Newspaper
Language:English
Published: Enheten för paleobiologi 2018
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-3228
https://doi.org/10.1017/S0016756816001114
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spelling ftnrm:oai:DiVA.org:nrm-3228 2023-05-15T14:05:22+02:00 The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin Edirisooriya, Geetha Dharmagunawardhane, H.A. McLoughlin, Stephen 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-3228 https://doi.org/10.1017/S0016756816001114 eng eng Enheten för paleobiologi Department of Geology, University of Peradeniya, Peradeniya, Sri Lanka Cambridge Geological Magazine, 0016-7568, 2018, 155, s. 907-920 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-3228 doi:10.1017/S0016756816001114 info:eu-repo/semantics/openAccess Glossopterids plant–insect interactions petroleum systems Gondwana continental break-up Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2018 ftnrm https://doi.org/10.1017/S0016756816001114 2021-10-08T07:21:18Z Strata exposed near Tabbowa Tank, Tabbowa Basin, western Sri Lanka have yielded the first representatives of the distinctive Permian Glossopteris flora from that country. The assemblage includes gymnosperm foliage attributable to Glossopteris raniganjensis, roots referable to Vertebraria australis, seeds assigned to Samaropsis sp., sphenophyte axes (Paracalamites australis) and foliage (Sphenophyllum emarginatum), and fern foliage (Dichotomopteris lindleyi). This small macroflora is interpreted to be of probable Lopingian (late Permian) age based on comparisons with the fossil floras of Peninsula India. Several Glossopteris leaves in the assemblage bear evidence of terrestrial arthropod interactions including hole feeding, margin feeding, possible lamina skeletonization, piercing-and-sucking damage and oviposition scarring. The newly identified onshore Permian strata necessitate re-evaluation of current models explaining the evolution of the adjacent offshore Mannar Basin. Previously considered to have begun subsiding and accumulating sediment during Jurassic time, we propose that the Mannar Basin may have initiated as part of a pan-Gondwanan extensional phase during late Palaeozoic – Triassic time. We interpret the basal, as yet unsampled, seismically reflective strata of this basin to be probable organic-rich continental strata of Lopingian age, equivalent to those recorded in the Tabbowa Basin, and similar to the Permian coal-bearing successions in the rift basins of eastern India and Antarctica. Such continental fossiliferous strata are particularly significant as potential source rocks for recently identified natural gas resources in the Mannar Basin. Also funded by National Science Foundation grant (project #1636625) Article in Journal/Newspaper Antarc* Antarctica Swedish Museum of Natural History: Publications (DiVA) Glossopteris ENVELOPE(-113.717,-113.717,-84.733,-84.733) Geological Magazine 155 4 907 920
institution Open Polar
collection Swedish Museum of Natural History: Publications (DiVA)
op_collection_id ftnrm
language English
topic Glossopterids
plant–insect interactions
petroleum systems
Gondwana
continental break-up
Other Earth and Related Environmental Sciences
Annan geovetenskap och miljövetenskap
spellingShingle Glossopterids
plant–insect interactions
petroleum systems
Gondwana
continental break-up
Other Earth and Related Environmental Sciences
Annan geovetenskap och miljövetenskap
Edirisooriya, Geetha
Dharmagunawardhane, H.A.
McLoughlin, Stephen
The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
topic_facet Glossopterids
plant–insect interactions
petroleum systems
Gondwana
continental break-up
Other Earth and Related Environmental Sciences
Annan geovetenskap och miljövetenskap
description Strata exposed near Tabbowa Tank, Tabbowa Basin, western Sri Lanka have yielded the first representatives of the distinctive Permian Glossopteris flora from that country. The assemblage includes gymnosperm foliage attributable to Glossopteris raniganjensis, roots referable to Vertebraria australis, seeds assigned to Samaropsis sp., sphenophyte axes (Paracalamites australis) and foliage (Sphenophyllum emarginatum), and fern foliage (Dichotomopteris lindleyi). This small macroflora is interpreted to be of probable Lopingian (late Permian) age based on comparisons with the fossil floras of Peninsula India. Several Glossopteris leaves in the assemblage bear evidence of terrestrial arthropod interactions including hole feeding, margin feeding, possible lamina skeletonization, piercing-and-sucking damage and oviposition scarring. The newly identified onshore Permian strata necessitate re-evaluation of current models explaining the evolution of the adjacent offshore Mannar Basin. Previously considered to have begun subsiding and accumulating sediment during Jurassic time, we propose that the Mannar Basin may have initiated as part of a pan-Gondwanan extensional phase during late Palaeozoic – Triassic time. We interpret the basal, as yet unsampled, seismically reflective strata of this basin to be probable organic-rich continental strata of Lopingian age, equivalent to those recorded in the Tabbowa Basin, and similar to the Permian coal-bearing successions in the rift basins of eastern India and Antarctica. Such continental fossiliferous strata are particularly significant as potential source rocks for recently identified natural gas resources in the Mannar Basin. Also funded by National Science Foundation grant (project #1636625)
format Article in Journal/Newspaper
author Edirisooriya, Geetha
Dharmagunawardhane, H.A.
McLoughlin, Stephen
author_facet Edirisooriya, Geetha
Dharmagunawardhane, H.A.
McLoughlin, Stephen
author_sort Edirisooriya, Geetha
title The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
title_short The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
title_full The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
title_fullStr The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
title_full_unstemmed The first record of the Permian Glossopteris flora from Sri Lanka: implications for hydrocarbon source rocks in the Mannar Basin
title_sort first record of the permian glossopteris flora from sri lanka: implications for hydrocarbon source rocks in the mannar basin
publisher Enheten för paleobiologi
publishDate 2018
url http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-3228
https://doi.org/10.1017/S0016756816001114
long_lat ENVELOPE(-113.717,-113.717,-84.733,-84.733)
geographic Glossopteris
geographic_facet Glossopteris
genre Antarc*
Antarctica
genre_facet Antarc*
Antarctica
op_relation Geological Magazine, 0016-7568, 2018, 155, s. 907-920
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-3228
doi:10.1017/S0016756816001114
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1017/S0016756816001114
container_title Geological Magazine
container_volume 155
container_issue 4
container_start_page 907
op_container_end_page 920
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