Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review
Lower Carboniferous ostracode assemblages of marine affinity occur in sediments of the Codroy Group in southwestern Newfoundland and the Windsor Group in central Nova Scotia. Three ostracode assemblages are defined from Nova Scotia and five from Newfoundland. The assemblages are described from biohe...
Published in: | Atlantic Geology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Atlantic Geoscience Society
1989
|
Subjects: | |
Online Access: | https://journals.lib.unb.ca/index.php/ag/article/view/1671 |
id |
ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/1671 |
---|---|
record_format |
openpolar |
spelling |
ftuninewbrunojs:oai:ojs.journals.lib.unb.ca:article/1671 2023-05-15T17:21:55+02:00 Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review Dewey, Chris 1989-04-01 application/pdf https://journals.lib.unb.ca/index.php/ag/article/view/1671 eng eng Atlantic Geoscience Society https://journals.lib.unb.ca/index.php/ag/article/view/1671/2037 https://journals.lib.unb.ca/index.php/ag/article/view/1671 Copyright (c) 2015 Atlantic Geology Atlantic Geoscience; Vol. 25 No. 1 (1989) 2564-2987 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1989 ftuninewbrunojs 2022-07-11T11:41:30Z Lower Carboniferous ostracode assemblages of marine affinity occur in sediments of the Codroy Group in southwestern Newfoundland and the Windsor Group in central Nova Scotia. Three ostracode assemblages are defined from Nova Scotia and five from Newfoundland. The assemblages are described from biohermal and non-biohermal limestones and fine-grained sihciclastic lithologies. The assemblages can be characterised by their responses to varying degrees of physiological stress, and are dominated by members of the Paraparchitacea, although bairdiaceans, hoDinomorph and kirkbyacean palaeocopids and kloedenellaceans may be locally abundant. In the Maritimes Basin, the combined effects of tectonism, eustatic fluctuation and a semi-arid climate resulted in palaeoenvironments that were characterised by low temporal and spatial stability. As a consequence, total ostracode species richness relative to individual species abundances was low, and often expressed in the development of low grade communities that were controlled more by physical (allogenic) rather than biological (autigenic) parameters. Under these conditions the eurytopic paraparchitaceans were capable of producing large populations in physically harsh palaeoenvironments, whereas die more stenotopic bairdiaceans and palaeocopes only occurred when conditions were favourable. R᳧SUM᳧ Les sdiments des groupes de Codroy (sud-ouest de Terre-Neuve) et de Windsor (centre de la Nouvelle-᳧cosse) renferment des assemblages d'Ostracodes, ᳲ affinity marine, du Carbonifᳺre infrieur. On reconnait trois assemblages en Nouvelle-᳧cosse et cinq ᳲ Terre-Neuve. Ces assemblages proviennent de calcaires (biohcrmaux ou non) et de lithologies siliciclastiques ᳲ grain fin. On peut caractriser ces assemblages par leurs re'ponses aux divers degre de stress physiologique. On y note la prlominance des reprentants des Paraparchitacea malgr l'abondance locale des bairdiacs, des palocopid hollinomorphes et kirkbyaces ainsi que des kloedenellacs. Dans le Bass in des Maritimes, la ... Article in Journal/Newspaper Newfoundland Terre-Neuve University of New Brunswick: Centre for Digital Scholarship Journals Canada Atlantic Geology 25 1 |
institution |
Open Polar |
collection |
University of New Brunswick: Centre for Digital Scholarship Journals |
op_collection_id |
ftuninewbrunojs |
language |
English |
description |
Lower Carboniferous ostracode assemblages of marine affinity occur in sediments of the Codroy Group in southwestern Newfoundland and the Windsor Group in central Nova Scotia. Three ostracode assemblages are defined from Nova Scotia and five from Newfoundland. The assemblages are described from biohermal and non-biohermal limestones and fine-grained sihciclastic lithologies. The assemblages can be characterised by their responses to varying degrees of physiological stress, and are dominated by members of the Paraparchitacea, although bairdiaceans, hoDinomorph and kirkbyacean palaeocopids and kloedenellaceans may be locally abundant. In the Maritimes Basin, the combined effects of tectonism, eustatic fluctuation and a semi-arid climate resulted in palaeoenvironments that were characterised by low temporal and spatial stability. As a consequence, total ostracode species richness relative to individual species abundances was low, and often expressed in the development of low grade communities that were controlled more by physical (allogenic) rather than biological (autigenic) parameters. Under these conditions the eurytopic paraparchitaceans were capable of producing large populations in physically harsh palaeoenvironments, whereas die more stenotopic bairdiaceans and palaeocopes only occurred when conditions were favourable. R᳧SUM᳧ Les sdiments des groupes de Codroy (sud-ouest de Terre-Neuve) et de Windsor (centre de la Nouvelle-᳧cosse) renferment des assemblages d'Ostracodes, ᳲ affinity marine, du Carbonifᳺre infrieur. On reconnait trois assemblages en Nouvelle-᳧cosse et cinq ᳲ Terre-Neuve. Ces assemblages proviennent de calcaires (biohcrmaux ou non) et de lithologies siliciclastiques ᳲ grain fin. On peut caractriser ces assemblages par leurs re'ponses aux divers degre de stress physiologique. On y note la prlominance des reprentants des Paraparchitacea malgr l'abondance locale des bairdiacs, des palocopid hollinomorphes et kirkbyaces ainsi que des kloedenellacs. Dans le Bass in des Maritimes, la ... |
format |
Article in Journal/Newspaper |
author |
Dewey, Chris |
spellingShingle |
Dewey, Chris Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
author_facet |
Dewey, Chris |
author_sort |
Dewey, Chris |
title |
Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
title_short |
Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
title_full |
Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
title_fullStr |
Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
title_full_unstemmed |
Lower Carboniferous ostracodes from the Maritimes Basin of eastern Canada: A review |
title_sort |
lower carboniferous ostracodes from the maritimes basin of eastern canada: a review |
publisher |
Atlantic Geoscience Society |
publishDate |
1989 |
url |
https://journals.lib.unb.ca/index.php/ag/article/view/1671 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland Terre-Neuve |
genre_facet |
Newfoundland Terre-Neuve |
op_source |
Atlantic Geoscience; Vol. 25 No. 1 (1989) 2564-2987 |
op_relation |
https://journals.lib.unb.ca/index.php/ag/article/view/1671/2037 https://journals.lib.unb.ca/index.php/ag/article/view/1671 |
op_rights |
Copyright (c) 2015 Atlantic Geology |
container_title |
Atlantic Geology |
container_volume |
25 |
container_issue |
1 |
_version_ |
1766107917093699584 |