The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis

Upper Mississippian sediments of the Codroy Group on the Port au Port Peninsula, western Newfoundland, are remnants of a once extensive cover that mantled a karsted palaeoridge of Cambro-Ordovician strata. Today, the sediment's are patchily preserved within karst depressions, and adjacent low-l...

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Main Author: Dix, George Roger
Format: Thesis
Language:English
Published: Memorial University of Newfoundland 1981
Subjects:
Online Access:https://research.library.mun.ca/6901/
https://research.library.mun.ca/6901/1/GeorgeRogerDix.pdf
https://research.library.mun.ca/6901/3/GeorgeRogerDix.pdf
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spelling ftmemorialuniv:oai:research.library.mun.ca:6901 2023-10-01T03:57:35+02:00 The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis Dix, George Roger 1981 application/pdf https://research.library.mun.ca/6901/ https://research.library.mun.ca/6901/1/GeorgeRogerDix.pdf https://research.library.mun.ca/6901/3/GeorgeRogerDix.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/6901/1/GeorgeRogerDix.pdf https://research.library.mun.ca/6901/3/GeorgeRogerDix.pdf Dix, George Roger <https://research.library.mun.ca/view/creator_az/Dix=3AGeorge_Roger=3A=3A.html> (1981) The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1981 ftmemorialuniv 2023-09-03T06:46:07Z Upper Mississippian sediments of the Codroy Group on the Port au Port Peninsula, western Newfoundland, are remnants of a once extensive cover that mantled a karsted palaeoridge of Cambro-Ordovician strata. Today, the sediment's are patchily preserved within karst depressions, and adjacent low-lying basins. The present topography of the peninsula is, in part, an exhumed Early Mississippian karst landscape featuring a variety of karren, karst valleys and caves. The Mississippian relic karst has been locally rejuvenated. -- Codroy strata constitute three coeval lithofacies: (1) marine carbonates, mainly bioherms, and interbedded fluvial sandstones, (2) marine evaporites, primarily gypsum/anhydrite, with minor, laminated limestone and fluvial elastics, and (3) alluvial-fan conglomerates and braided-stream sandstones. Prograding fluvial and alluvial sediments subsequently buried the marine basins. -- Fauna and sedimentology indicate that the marine sediments were deposited in a schizohaline environment adjacent to a, well-drained landmass. Preserved miospores and plant debris in the limestones, elastics, and gypsum indicate that plants, though not abundant, grew on the slopes of the ridge. Late Mississippian seas along (the northern and western margins of the Port au Port ridge supported a prolific community of brachiopods, bryozoans, blue-green algae, molluscs, and ostracodes. Cephalopods, foraminifers, and conodonts are low both in species and individuals, whereas true corals, and crinoids/echinoids are absent. Fauna traditionally used to differentiate between Upper and Lower Codroy strata are found to occur together within the marine carbonates, but, in two distinct facies. This indicates that the marine macrofauna, and probably microfauna, are facies-controlled prohibiting their use in detailed biostratigraphlc zonation. -- Marine carbonates infilling palaeokarst valleys may constitute either bryozoan/algal biolithites plastered against the valley walls and/or carbonate mounds of a similar lithology, with ... Thesis Newfoundland Memorial University of Newfoundland: Research Repository
institution Open Polar
collection Memorial University of Newfoundland: Research Repository
op_collection_id ftmemorialuniv
language English
description Upper Mississippian sediments of the Codroy Group on the Port au Port Peninsula, western Newfoundland, are remnants of a once extensive cover that mantled a karsted palaeoridge of Cambro-Ordovician strata. Today, the sediment's are patchily preserved within karst depressions, and adjacent low-lying basins. The present topography of the peninsula is, in part, an exhumed Early Mississippian karst landscape featuring a variety of karren, karst valleys and caves. The Mississippian relic karst has been locally rejuvenated. -- Codroy strata constitute three coeval lithofacies: (1) marine carbonates, mainly bioherms, and interbedded fluvial sandstones, (2) marine evaporites, primarily gypsum/anhydrite, with minor, laminated limestone and fluvial elastics, and (3) alluvial-fan conglomerates and braided-stream sandstones. Prograding fluvial and alluvial sediments subsequently buried the marine basins. -- Fauna and sedimentology indicate that the marine sediments were deposited in a schizohaline environment adjacent to a, well-drained landmass. Preserved miospores and plant debris in the limestones, elastics, and gypsum indicate that plants, though not abundant, grew on the slopes of the ridge. Late Mississippian seas along (the northern and western margins of the Port au Port ridge supported a prolific community of brachiopods, bryozoans, blue-green algae, molluscs, and ostracodes. Cephalopods, foraminifers, and conodonts are low both in species and individuals, whereas true corals, and crinoids/echinoids are absent. Fauna traditionally used to differentiate between Upper and Lower Codroy strata are found to occur together within the marine carbonates, but, in two distinct facies. This indicates that the marine macrofauna, and probably microfauna, are facies-controlled prohibiting their use in detailed biostratigraphlc zonation. -- Marine carbonates infilling palaeokarst valleys may constitute either bryozoan/algal biolithites plastered against the valley walls and/or carbonate mounds of a similar lithology, with ...
format Thesis
author Dix, George Roger
spellingShingle Dix, George Roger
The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
author_facet Dix, George Roger
author_sort Dix, George Roger
title The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
title_short The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
title_full The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
title_fullStr The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
title_full_unstemmed The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
title_sort codroy group (upper mississippian) on the port au port peninsula, western newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis
publisher Memorial University of Newfoundland
publishDate 1981
url https://research.library.mun.ca/6901/
https://research.library.mun.ca/6901/1/GeorgeRogerDix.pdf
https://research.library.mun.ca/6901/3/GeorgeRogerDix.pdf
genre Newfoundland
genre_facet Newfoundland
op_relation https://research.library.mun.ca/6901/1/GeorgeRogerDix.pdf
https://research.library.mun.ca/6901/3/GeorgeRogerDix.pdf
Dix, George Roger <https://research.library.mun.ca/view/creator_az/Dix=3AGeorge_Roger=3A=3A.html> (1981) The Codroy Group (Upper Mississippian) on the Port au Port Peninsula, western Newfoundland: stratigraphy, palaeontology, sedimentology and diagenesis. Masters thesis, Memorial University of Newfoundland.
op_rights thesis_license
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