Jurassic microfossils of DSDP Hole 79-547B
The first marine incursion of the incipient North Atlantic Ocean is recorded in the uppermost Triassic to Lower Jurassic sequence of DSDP Site 547 off central Morocco. A lithologic change from continental red beds below to slope breccias and hemipelagic carbonates above indicates that a carbonate ra...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.809976 2024-09-09T19:53:48+00:00 Jurassic microfossils of DSDP Hole 79-547B Riegraf, Wolfgang Luterbacher, Hanspeter Leckie, R Mark LATITUDE: 33.780700 * LONGITUDE: -9.349700 * DATE/TIME START: 1981-05-03T00:00:00 * DATE/TIME END: 1981-05-03T00:00:00 1984 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.809976 https://doi.org/10.1594/PANGAEA.809976 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.809976 https://doi.org/10.1594/PANGAEA.809976 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Riegraf, Wolfgang; Luterbacher, Hanspeter; Leckie, R Mark (1984): Jurassic foraminifers from the Mazagan Plateau, Deep Sea Drilling Project Site 547, Leg 79, off Morocco. In: Hinz, K; Winterer, EL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 79, 671-702, https://doi.org/10.2973/dsdp.proc.79.126.1984 79-547B Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg79 North Atlantic/PLATEAU dataset publication series 1984 ftpangaea https://doi.org/10.1594/PANGAEA.80997610.2973/dsdp.proc.79.126.1984 2024-07-24T02:31:21Z The first marine incursion of the incipient North Atlantic Ocean is recorded in the uppermost Triassic to Lower Jurassic sequence of DSDP Site 547 off central Morocco. A lithologic change from continental red beds below to slope breccias and hemipelagic carbonates above indicates that a carbonate ramp was probably established by Sinemurian time along the Moroccan continental margin and that subsidence in the adjacent basin was rapid in the early phases of continental rift. Foraminifers recovered from the Liassic (Sinemurian-Pliensbachian) basinal deposits are diverse and well preserved. The faunas are compositionally similar to contemporaneous neritic assemblages of Europe and the Grand Banks of Newfoundland. The Middle Jurassic in Hole 547B is characterized by regressive deposits that are poor in foraminifers. The major Late Jurassic "Atlantic" transgression is again represented by basinal deposits consisting of limestone breccias and pelagic carbonates. Foraminifers recovered from this interval are transitional between Late Jurassic assemblages reported from deep-sea deposits in the North Atlantic and typical Late Jurassic neritic assemblages of Europe. The Late Jurassic assemblages of Hole 547B are primarily dominated by nodosariids and spirillinids with moderate abundances of simple arenaceous forms. Nonreticulate epistominids occur very rarely in the Upper Jurassic of Hole 547B. It is tentatively suggested that these represent upper bathyal assemblages. Other/Unknown Material Newfoundland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-9.349700,-9.349700,33.780700,33.780700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
79-547B Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg79 North Atlantic/PLATEAU |
spellingShingle |
79-547B Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg79 North Atlantic/PLATEAU Riegraf, Wolfgang Luterbacher, Hanspeter Leckie, R Mark Jurassic microfossils of DSDP Hole 79-547B |
topic_facet |
79-547B Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg79 North Atlantic/PLATEAU |
description |
The first marine incursion of the incipient North Atlantic Ocean is recorded in the uppermost Triassic to Lower Jurassic sequence of DSDP Site 547 off central Morocco. A lithologic change from continental red beds below to slope breccias and hemipelagic carbonates above indicates that a carbonate ramp was probably established by Sinemurian time along the Moroccan continental margin and that subsidence in the adjacent basin was rapid in the early phases of continental rift. Foraminifers recovered from the Liassic (Sinemurian-Pliensbachian) basinal deposits are diverse and well preserved. The faunas are compositionally similar to contemporaneous neritic assemblages of Europe and the Grand Banks of Newfoundland. The Middle Jurassic in Hole 547B is characterized by regressive deposits that are poor in foraminifers. The major Late Jurassic "Atlantic" transgression is again represented by basinal deposits consisting of limestone breccias and pelagic carbonates. Foraminifers recovered from this interval are transitional between Late Jurassic assemblages reported from deep-sea deposits in the North Atlantic and typical Late Jurassic neritic assemblages of Europe. The Late Jurassic assemblages of Hole 547B are primarily dominated by nodosariids and spirillinids with moderate abundances of simple arenaceous forms. Nonreticulate epistominids occur very rarely in the Upper Jurassic of Hole 547B. It is tentatively suggested that these represent upper bathyal assemblages. |
format |
Other/Unknown Material |
author |
Riegraf, Wolfgang Luterbacher, Hanspeter Leckie, R Mark |
author_facet |
Riegraf, Wolfgang Luterbacher, Hanspeter Leckie, R Mark |
author_sort |
Riegraf, Wolfgang |
title |
Jurassic microfossils of DSDP Hole 79-547B |
title_short |
Jurassic microfossils of DSDP Hole 79-547B |
title_full |
Jurassic microfossils of DSDP Hole 79-547B |
title_fullStr |
Jurassic microfossils of DSDP Hole 79-547B |
title_full_unstemmed |
Jurassic microfossils of DSDP Hole 79-547B |
title_sort |
jurassic microfossils of dsdp hole 79-547b |
publisher |
PANGAEA |
publishDate |
1984 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.809976 https://doi.org/10.1594/PANGAEA.809976 |
op_coverage |
LATITUDE: 33.780700 * LONGITUDE: -9.349700 * DATE/TIME START: 1981-05-03T00:00:00 * DATE/TIME END: 1981-05-03T00:00:00 |
long_lat |
ENVELOPE(-9.349700,-9.349700,33.780700,33.780700) |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
Supplement to: Riegraf, Wolfgang; Luterbacher, Hanspeter; Leckie, R Mark (1984): Jurassic foraminifers from the Mazagan Plateau, Deep Sea Drilling Project Site 547, Leg 79, off Morocco. In: Hinz, K; Winterer, EL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 79, 671-702, https://doi.org/10.2973/dsdp.proc.79.126.1984 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.809976 https://doi.org/10.1594/PANGAEA.809976 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.80997610.2973/dsdp.proc.79.126.1984 |
_version_ |
1809923254904684544 |