Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications
The James Ross Basin, in the northern Antarctic Peninsula, exposes which is probably the world thickest and most complete Late Cretaceous sedimentary succession of southern high latitudes. Despite its very good exposures and varied and abundant fossil fauna, precise chronological determination of it...
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ftunibueairesbd:paper:paper_0950091X_v_n_p_Milanese 2023-05-15T13:51:24+02:00 Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0950091X_v_n_p_Milanese https://hdl.handle.net/20.500.12110/paper_0950091X_v_n_p_Milanese unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0950091X_v_n_p_Milanese http://hdl.handle.net/20.500.12110/paper_0950091X_v_n_p_Milanese Antarctic Peninsula Marambio group palaeomagnetism upper cretaceous 2019 ftunibueairesbd https://doi.org/20.500.12110/paper_0950091X_v_n_p_Milanese 2023-02-16T02:10:14Z The James Ross Basin, in the northern Antarctic Peninsula, exposes which is probably the world thickest and most complete Late Cretaceous sedimentary succession of southern high latitudes. Despite its very good exposures and varied and abundant fossil fauna, precise chronological determination of its infill is still lacking. We report results from a magnetostratigraphic study on shelfal sedimentary rocks of the Marambio Group, southeastern James Ross Basin, Antarctica. The succession studied covers a ~1,200 m-thick stratigraphic interval within the Hamilton Point, Sanctuary Cliffs and Karlsen Cliffs Members of the Snow Hill Island Formation, the Haslum Crag Formation, and the lower López de Bertodano Formation. The basic chronological reference framework is given by ammonite assemblages, which indicate a Late Campanian – Early Maastrichtian age for the studied units. Magnetostratigraphic samples were obtained from five partial sections located on James Ross and Snow Hill islands, the results from which agree partially with this previous biostratigraphical framework. Seven geomagnetic polarity reversals are identified in this work, allowing to identify the Chron C32/C33 boundary in Ammonite Assemblage 8-1, confirming the Late Campanian age of the Hamilton Point Member. However, the identification of the Chron C32/C31 boundary in Ammonite Assemblage 8-2 assigns the base of the Sanctuary Cliffs Member to the early Maastrichtian, which differs from the Late Campanian age previously assigned by ammonite biostratigraphy. This magnetostratigraphy spans ~14 Ma of sedimentary succession and together with previous partial magnetostratigraphies on Early-Mid Campanian and Middle Maastrichtian to Danian columns permits a complete and continuous record of the Late Cretaceous distal deposits of the James Ross Basin. This provides the required chronological resolution to solve the intra-basin and global correlation problems of the Late Cretaceous in the Southern Hemisphere in general and in the Weddellian province in ... Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Snow Hill Island Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Antarctic Peninsula Hamilton Point ENVELOPE(-57.300,-57.300,-64.367,-64.367) Haslum ENVELOPE(-56.956,-56.956,-64.359,-64.359) Haslum Crag ENVELOPE(-56.983,-56.983,-64.367,-64.367) Hill Island ENVELOPE(76.070,76.070,-69.395,-69.395) Karlsen ENVELOPE(-46.000,-46.000,-60.350,-60.350) Karlsen Cliffs ENVELOPE(-56.954,-56.954,-64.342,-64.342) Marambio ENVELOPE(-56.750,-56.750,-64.283,-64.283) Sanctuary Cliffs ENVELOPE(-57.175,-57.175,-64.443,-64.443) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Snow Hill Island ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Antarctic Peninsula Marambio group palaeomagnetism upper cretaceous |
spellingShingle |
Antarctic Peninsula Marambio group palaeomagnetism upper cretaceous Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
topic_facet |
Antarctic Peninsula Marambio group palaeomagnetism upper cretaceous |
description |
The James Ross Basin, in the northern Antarctic Peninsula, exposes which is probably the world thickest and most complete Late Cretaceous sedimentary succession of southern high latitudes. Despite its very good exposures and varied and abundant fossil fauna, precise chronological determination of its infill is still lacking. We report results from a magnetostratigraphic study on shelfal sedimentary rocks of the Marambio Group, southeastern James Ross Basin, Antarctica. The succession studied covers a ~1,200 m-thick stratigraphic interval within the Hamilton Point, Sanctuary Cliffs and Karlsen Cliffs Members of the Snow Hill Island Formation, the Haslum Crag Formation, and the lower López de Bertodano Formation. The basic chronological reference framework is given by ammonite assemblages, which indicate a Late Campanian – Early Maastrichtian age for the studied units. Magnetostratigraphic samples were obtained from five partial sections located on James Ross and Snow Hill islands, the results from which agree partially with this previous biostratigraphical framework. Seven geomagnetic polarity reversals are identified in this work, allowing to identify the Chron C32/C33 boundary in Ammonite Assemblage 8-1, confirming the Late Campanian age of the Hamilton Point Member. However, the identification of the Chron C32/C31 boundary in Ammonite Assemblage 8-2 assigns the base of the Sanctuary Cliffs Member to the early Maastrichtian, which differs from the Late Campanian age previously assigned by ammonite biostratigraphy. This magnetostratigraphy spans ~14 Ma of sedimentary succession and together with previous partial magnetostratigraphies on Early-Mid Campanian and Middle Maastrichtian to Danian columns permits a complete and continuous record of the Late Cretaceous distal deposits of the James Ross Basin. This provides the required chronological resolution to solve the intra-basin and global correlation problems of the Late Cretaceous in the Southern Hemisphere in general and in the Weddellian province in ... |
title |
Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
title_short |
Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
title_full |
Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
title_fullStr |
Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
title_full_unstemmed |
Mid Campanian-Lower Maastrichtian magnetostratigraphy of the James Ross Basin, Antarctica: Chronostratigraphical implications |
title_sort |
mid campanian-lower maastrichtian magnetostratigraphy of the james ross basin, antarctica: chronostratigraphical implications |
publishDate |
2019 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0950091X_v_n_p_Milanese https://hdl.handle.net/20.500.12110/paper_0950091X_v_n_p_Milanese |
long_lat |
ENVELOPE(-57.300,-57.300,-64.367,-64.367) ENVELOPE(-56.956,-56.956,-64.359,-64.359) ENVELOPE(-56.983,-56.983,-64.367,-64.367) ENVELOPE(76.070,76.070,-69.395,-69.395) ENVELOPE(-46.000,-46.000,-60.350,-60.350) ENVELOPE(-56.954,-56.954,-64.342,-64.342) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-57.175,-57.175,-64.443,-64.443) ENVELOPE(-57.183,-57.183,-64.466,-64.466) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic Antarctic Peninsula Hamilton Point Haslum Haslum Crag Hill Island Karlsen Karlsen Cliffs Marambio Sanctuary Cliffs Snow Hill Snow Hill Island |
geographic_facet |
Antarctic Antarctic Peninsula Hamilton Point Haslum Haslum Crag Hill Island Karlsen Karlsen Cliffs Marambio Sanctuary Cliffs Snow Hill Snow Hill Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Snow Hill Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Snow Hill Island |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0950091X_v_n_p_Milanese http://hdl.handle.net/20.500.12110/paper_0950091X_v_n_p_Milanese |
op_doi |
https://doi.org/20.500.12110/paper_0950091X_v_n_p_Milanese |
_version_ |
1766255258490634240 |