Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland
Detailed studies on the Precambrian Signal Hill Formation and the overlying Blackhead Formation exposed between Flatrock and Ferryland reveal minor lithological variations. Lithofeldspathic Sandstone is predominant and forms most of the lower and middle members of the Signal Hill Formation and most...
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Memorial University of Newfoundland
1969
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ftmemorialuniv:oai:research.library.mun.ca:6910 2023-10-01T03:57:37+02:00 Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland Singh, Chatra Ket 1969 application/pdf https://research.library.mun.ca/6910/ https://research.library.mun.ca/6910/1/CKSingh.pdf https://research.library.mun.ca/6910/3/CKSingh.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/6910/1/CKSingh.pdf https://research.library.mun.ca/6910/3/CKSingh.pdf Singh, Chatra Ket <https://research.library.mun.ca/view/creator_az/Singh=3AChatra_Ket=3A=3A.html> (1969) Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1969 ftmemorialuniv 2023-09-03T06:46:07Z Detailed studies on the Precambrian Signal Hill Formation and the overlying Blackhead Formation exposed between Flatrock and Ferryland reveal minor lithological variations. Lithofeldspathic Sandstone is predominant and forms most of the lower and middle members of the Signal Hill Formation and most of the Blackhead Formation. Conglomerate forms most of the upper member of the Signal Hill Formation. It is composed mainly of pebbles of tuff and rhyolite, sedimentary rocks, granitoid rocks, quartzite, and basic volcanic rocks, in order of decreasing abundance. -- The mineralogy of the Signal Hill and Blackhead Formations is similar and indicates common source rocks. Sediments were derived from Harbour Main, Conception and Holyrood - type rocks, exposed at that time somewhere to the north of the site of deposition. Ripple marks and cross-bedding displayed in the sandstone and siltstone of the lower and middle members of the Signal Hill Formations suggest deposition in an environment similar to the undathem environment of Rich (1951). Progressive upward fining of the Signal Hill conglomerate and concomitant change from planar bedding to cross bedding suggest a change in the depositing streams from conditions of predominantly rapid flow of the upper flow regime to those of tranquil flow of the lower flow regime. The rocks of the Blackhead Formation show features, characteristic of fluvial braided river deposits. These are mainly planar and trough cross-bedding, channels and mud cracks. Thesis Newfoundland Memorial University of Newfoundland: Research Repository Flatrock ENVELOPE(-120.283,-120.283,56.267,56.267) |
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Memorial University of Newfoundland: Research Repository |
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language |
English |
description |
Detailed studies on the Precambrian Signal Hill Formation and the overlying Blackhead Formation exposed between Flatrock and Ferryland reveal minor lithological variations. Lithofeldspathic Sandstone is predominant and forms most of the lower and middle members of the Signal Hill Formation and most of the Blackhead Formation. Conglomerate forms most of the upper member of the Signal Hill Formation. It is composed mainly of pebbles of tuff and rhyolite, sedimentary rocks, granitoid rocks, quartzite, and basic volcanic rocks, in order of decreasing abundance. -- The mineralogy of the Signal Hill and Blackhead Formations is similar and indicates common source rocks. Sediments were derived from Harbour Main, Conception and Holyrood - type rocks, exposed at that time somewhere to the north of the site of deposition. Ripple marks and cross-bedding displayed in the sandstone and siltstone of the lower and middle members of the Signal Hill Formations suggest deposition in an environment similar to the undathem environment of Rich (1951). Progressive upward fining of the Signal Hill conglomerate and concomitant change from planar bedding to cross bedding suggest a change in the depositing streams from conditions of predominantly rapid flow of the upper flow regime to those of tranquil flow of the lower flow regime. The rocks of the Blackhead Formation show features, characteristic of fluvial braided river deposits. These are mainly planar and trough cross-bedding, channels and mud cracks. |
format |
Thesis |
author |
Singh, Chatra Ket |
spellingShingle |
Singh, Chatra Ket Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
author_facet |
Singh, Chatra Ket |
author_sort |
Singh, Chatra Ket |
title |
Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
title_short |
Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
title_full |
Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
title_fullStr |
Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
title_full_unstemmed |
Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland |
title_sort |
petrology of the signal hill and blackhead formations, avalon peninsula, newfoundland |
publisher |
Memorial University of Newfoundland |
publishDate |
1969 |
url |
https://research.library.mun.ca/6910/ https://research.library.mun.ca/6910/1/CKSingh.pdf https://research.library.mun.ca/6910/3/CKSingh.pdf |
long_lat |
ENVELOPE(-120.283,-120.283,56.267,56.267) |
geographic |
Flatrock |
geographic_facet |
Flatrock |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/6910/1/CKSingh.pdf https://research.library.mun.ca/6910/3/CKSingh.pdf Singh, Chatra Ket <https://research.library.mun.ca/view/creator_az/Singh=3AChatra_Ket=3A=3A.html> (1969) Petrology of the Signal Hill and Blackhead formations, Avalon Peninsula, Newfoundland. Masters thesis, Memorial University of Newfoundland. |
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thesis_license |
_version_ |
1778529437935992832 |