A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession
Since too few absolute age determinations have been carried out on late Precambrian rocks of the Avalon Peninsula, southeastern Newfoundland, a stratigraphic approach has been adopted to obtain the necessary dates on which to base a possible time-span for the whole succession. The correlatable '...
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1972
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crcansciencepubl:10.1139/e72-151 2024-04-28T08:14:58+00:00 A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession Anderson, M. M. 1972 http://dx.doi.org/10.1139/e72-151 http://www.nrcresearchpress.com/doi/pdf/10.1139/e72-151 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 9, issue 12, page 1710-1726 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1972 crcansciencepubl https://doi.org/10.1139/e72-151 2024-04-09T06:56:28Z Since too few absolute age determinations have been carried out on late Precambrian rocks of the Avalon Peninsula, southeastern Newfoundland, a stratigraphic approach has been adopted to obtain the necessary dates on which to base a possible time-span for the whole succession. The correlatable 'features' of the Avalon Peninsula late Precambrian—fossils, tillites, and volcanic episodes, have been correlated with similar 'features' in late Precambrian sequences in other parts of the world where these 'features' have been dated isotopically. Some of the correlations are probable, others only possible as long-distance correlation involves an element of speculation.Conception Group sedimentation may have lasted from 710 m.y. ago, the possible age of the 'basal' conglomerate, to ca 600 m.y. ago, and possible ages for the Conception Group tillites and fossils (Mistaken Point fauna) are 670–715 m.y. and 610 to 630 m.y. respectively. Harbour Main volcanism began some 795 m.y. ago and continued until about 715 m.y. before present. These ages indicate a possible age-range for the late Precambrian of the Avalon Peninsula from ca 800 m.y. to 570 m.y. (age of base of Cambrian accepted here), a time span of ca 230 m.y. that is equivalent to the greater part of the Proterozoic Hadrynian Era.The soft-bodied metazoan fossils of the Conception Group Mistaken Point fauna are comparable to those of the Australian Ediacara fauna and related forms in other parts of the world. Conception Group tillites are correlated with glaciogenic deposits of the uppermost Precambrian ice age in central Australia, the Rybachiy Peninsula, U.S.S.R., and Scotland (Dalradian tillites). Harbour Main Group volcanics are correlated with part of the Coldbrook Group volcanic sequence, southern New Brunswick; the Fourchu Group and Morrison River Formation of southeast Cape Breton Island are believed younger, and possibly, the time equivalent of the upper part of the Musgravetown Group together with the Random Formation, western Avalon, although the ... Article in Journal/Newspaper Breton Island Newfoundland Rybachiy Peninsula Canadian Science Publishing Canadian Journal of Earth Sciences 9 12 1710 1726 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Anderson, M. M. A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
topic_facet |
General Earth and Planetary Sciences |
description |
Since too few absolute age determinations have been carried out on late Precambrian rocks of the Avalon Peninsula, southeastern Newfoundland, a stratigraphic approach has been adopted to obtain the necessary dates on which to base a possible time-span for the whole succession. The correlatable 'features' of the Avalon Peninsula late Precambrian—fossils, tillites, and volcanic episodes, have been correlated with similar 'features' in late Precambrian sequences in other parts of the world where these 'features' have been dated isotopically. Some of the correlations are probable, others only possible as long-distance correlation involves an element of speculation.Conception Group sedimentation may have lasted from 710 m.y. ago, the possible age of the 'basal' conglomerate, to ca 600 m.y. ago, and possible ages for the Conception Group tillites and fossils (Mistaken Point fauna) are 670–715 m.y. and 610 to 630 m.y. respectively. Harbour Main volcanism began some 795 m.y. ago and continued until about 715 m.y. before present. These ages indicate a possible age-range for the late Precambrian of the Avalon Peninsula from ca 800 m.y. to 570 m.y. (age of base of Cambrian accepted here), a time span of ca 230 m.y. that is equivalent to the greater part of the Proterozoic Hadrynian Era.The soft-bodied metazoan fossils of the Conception Group Mistaken Point fauna are comparable to those of the Australian Ediacara fauna and related forms in other parts of the world. Conception Group tillites are correlated with glaciogenic deposits of the uppermost Precambrian ice age in central Australia, the Rybachiy Peninsula, U.S.S.R., and Scotland (Dalradian tillites). Harbour Main Group volcanics are correlated with part of the Coldbrook Group volcanic sequence, southern New Brunswick; the Fourchu Group and Morrison River Formation of southeast Cape Breton Island are believed younger, and possibly, the time equivalent of the upper part of the Musgravetown Group together with the Random Formation, western Avalon, although the ... |
format |
Article in Journal/Newspaper |
author |
Anderson, M. M. |
author_facet |
Anderson, M. M. |
author_sort |
Anderson, M. M. |
title |
A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
title_short |
A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
title_full |
A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
title_fullStr |
A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
title_full_unstemmed |
A Possible Time Span for the Late Precambrian of the Avalon Peninsula, Southeastern Newfoundland in the Light of Worldwide Correlation of Fossils, Tillites, and Rock Units within the Succession |
title_sort |
possible time span for the late precambrian of the avalon peninsula, southeastern newfoundland in the light of worldwide correlation of fossils, tillites, and rock units within the succession |
publisher |
Canadian Science Publishing |
publishDate |
1972 |
url |
http://dx.doi.org/10.1139/e72-151 http://www.nrcresearchpress.com/doi/pdf/10.1139/e72-151 |
genre |
Breton Island Newfoundland Rybachiy Peninsula |
genre_facet |
Breton Island Newfoundland Rybachiy Peninsula |
op_source |
Canadian Journal of Earth Sciences volume 9, issue 12, page 1710-1726 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e72-151 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
9 |
container_issue |
12 |
container_start_page |
1710 |
op_container_end_page |
1726 |
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1797580799565889536 |