Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories
Flat-pebble conglomerates in the McLeary Formation of the Belcher Group display close packing of intraformational slabs in near-vertical arrays that appear distinctively polygonal in sections parallel to bedding. Such arrangements of flat pebbles, known by names such as stone rosettes and slone pack...
Published in: | Canadian Journal of Earth Sciences |
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1979
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crcansciencepubl:10.1139/e79-174 2023-12-17T10:47:41+01:00 Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories Rlcketts, B. D. Donaldson, J. A. 1979 http://dx.doi.org/10.1139/e79-174 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-174 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 16, issue 9, page 1887-1891 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1979 crcansciencepubl https://doi.org/10.1139/e79-174 2023-11-19T13:38:19Z Flat-pebble conglomerates in the McLeary Formation of the Belcher Group display close packing of intraformational slabs in near-vertical arrays that appear distinctively polygonal in sections parallel to bedding. Such arrangements of flat pebbles, known by names such as stone rosettes and slone packings, are common on modem beaches, especially within the swash and backwash zone of shore platforms. Association of the McLeary stone rosettes with sedimentary features suggestive of shallow subtidal to supratidal origin (herringbone cross-bedding, reactivation surfaces, desiccation cracks, tepee structures, gypsum casts, oncolites, stromatolites, and probable beachrock) supports a hydrodynamic origin for these polygonal arrays of flat pebbles, an origin that has been demonstrated for modern occurrences. Where associated structures corroborate interpretation of a shallow-water origin, such stone rosettes provide evidence for ancient strandlines, and the designation "beach rosettes" is suggested as appropriate to distinguish them from stone rosettes formed by periglacial processes. Article in Journal/Newspaper Northwest Territories Canadian Science Publishing (via Crossref) Northwest Territories Belcher ENVELOPE(-94.172,-94.172,57.936,57.936) Swash ENVELOPE(-67.524,-67.524,-67.581,-67.581) Canadian Journal of Earth Sciences 16 9 1887 1891 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Rlcketts, B. D. Donaldson, J. A. Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
topic_facet |
General Earth and Planetary Sciences |
description |
Flat-pebble conglomerates in the McLeary Formation of the Belcher Group display close packing of intraformational slabs in near-vertical arrays that appear distinctively polygonal in sections parallel to bedding. Such arrangements of flat pebbles, known by names such as stone rosettes and slone packings, are common on modem beaches, especially within the swash and backwash zone of shore platforms. Association of the McLeary stone rosettes with sedimentary features suggestive of shallow subtidal to supratidal origin (herringbone cross-bedding, reactivation surfaces, desiccation cracks, tepee structures, gypsum casts, oncolites, stromatolites, and probable beachrock) supports a hydrodynamic origin for these polygonal arrays of flat pebbles, an origin that has been demonstrated for modern occurrences. Where associated structures corroborate interpretation of a shallow-water origin, such stone rosettes provide evidence for ancient strandlines, and the designation "beach rosettes" is suggested as appropriate to distinguish them from stone rosettes formed by periglacial processes. |
format |
Article in Journal/Newspaper |
author |
Rlcketts, B. D. Donaldson, J. A. |
author_facet |
Rlcketts, B. D. Donaldson, J. A. |
author_sort |
Rlcketts, B. D. |
title |
Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
title_short |
Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
title_full |
Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
title_fullStr |
Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
title_full_unstemmed |
Stone rosettes as indicators of ancient shorelines: examples from the Precambrian Belcher Group, Northwest Territories |
title_sort |
stone rosettes as indicators of ancient shorelines: examples from the precambrian belcher group, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1979 |
url |
http://dx.doi.org/10.1139/e79-174 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-174 |
long_lat |
ENVELOPE(-94.172,-94.172,57.936,57.936) ENVELOPE(-67.524,-67.524,-67.581,-67.581) |
geographic |
Northwest Territories Belcher Swash |
geographic_facet |
Northwest Territories Belcher Swash |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 16, issue 9, page 1887-1891 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e79-174 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
16 |
container_issue |
9 |
container_start_page |
1887 |
op_container_end_page |
1891 |
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1785571614554849280 |