Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana
Substantial new information is presented on upper Artinskian–Kungurian deposits in Timor-Leste and in the Canning, Southern Carnarvon and northern Perth basins of Western Australia. These basins, situated between about 35°S and 55°S palaeolatitude, formed part of the East Gondwana interior rift, a p...
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ftboisestateu:oai:scholarworks.boisestate.edu:geo_facpubs-1328 2023-11-12T04:26:06+01:00 Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana Davydov, Vladimir I. 2017-02-15T08:00:00Z https://scholarworks.boisestate.edu/geo_facpubs/325 https://doi.org/10.1016/j.palaeo.2016.11.051 unknown ScholarWorks https://scholarworks.boisestate.edu/geo_facpubs/325 https://doi.org/10.1016/j.palaeo.2016.11.051 Geosciences Faculty Publications and Presentations East Gondwana rift Maubisse Group Cribas Group Noonkanbah Formation Byro Group Carynginia Formation Earth Sciences Geophysics and Seismology text 2017 ftboisestateu https://doi.org/10.1016/j.palaeo.2016.11.051 2023-10-20T00:12:57Z Substantial new information is presented on upper Artinskian–Kungurian deposits in Timor-Leste and in the Canning, Southern Carnarvon and northern Perth basins of Western Australia. These basins, situated between about 35°S and 55°S palaeolatitude, formed part of the East Gondwana interior rift, a precursor to the rift that 100 my later formed the Indian Ocean in this region. Timor lay near the main axis of the East Gondwana interior rift, whereas the Western Australian basins were marginal splays from the rift axis. The main depocentres developed as a result of faulting that was initiated during the Late Pennsylvanian. Detailed lithostratigraphic and biostratigraphic analyses have been made on the newly recognized Bua-bai limestone and the type Cribas Group in Timor, the Noonkanbah Formation in the Canning Basin, the Byro Group in the Merlinleigh Sub-basin of the Southern Carnarvon Basin, and the Carynginia Formation in the northern Perth Basin. In Timor the succession, which is highly disrupted by faulting, was deposited under open-marine conditions probably in a shelf–basin setting. Restricted, very shallow-water seas flooded the Canning Basin and the Merlinleigh–Byro–Irwin sub-basins of the Southern Carnarvon and northern Perth basins and had highly variable oxygen levels and salinities typical of estuarine environments. A similar pattern of warming and bathymetric change is recognized in all studied basins. During the early part of the late Artinskian cool conditions prevailed, with water temperatures 0–4 °C forming sea ice in the Merlinleigh–Byro–Irwin rift. Rapid warming during the latter part of the late Artinskian was accompanied by maximum marine flooding close to the Artinskian–Kungurian boundary. Climatic and bathymetric conditions then allowed carbonate mounds, with larger fusulines and a variety of algae, to develop in the northern part of the rift system, and Tubiphytes, conodonts, and brachiopods with Tethyan affinities to migrate into the marginal-rift basins despite the generally adverse water ... Text Sea ice Boise State University: Scholar Works Indian Palaeogeography, Palaeoclimatology, Palaeoecology 468 88 121 |
institution |
Open Polar |
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Boise State University: Scholar Works |
op_collection_id |
ftboisestateu |
language |
unknown |
topic |
East Gondwana rift Maubisse Group Cribas Group Noonkanbah Formation Byro Group Carynginia Formation Earth Sciences Geophysics and Seismology |
spellingShingle |
East Gondwana rift Maubisse Group Cribas Group Noonkanbah Formation Byro Group Carynginia Formation Earth Sciences Geophysics and Seismology Davydov, Vladimir I. Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
topic_facet |
East Gondwana rift Maubisse Group Cribas Group Noonkanbah Formation Byro Group Carynginia Formation Earth Sciences Geophysics and Seismology |
description |
Substantial new information is presented on upper Artinskian–Kungurian deposits in Timor-Leste and in the Canning, Southern Carnarvon and northern Perth basins of Western Australia. These basins, situated between about 35°S and 55°S palaeolatitude, formed part of the East Gondwana interior rift, a precursor to the rift that 100 my later formed the Indian Ocean in this region. Timor lay near the main axis of the East Gondwana interior rift, whereas the Western Australian basins were marginal splays from the rift axis. The main depocentres developed as a result of faulting that was initiated during the Late Pennsylvanian. Detailed lithostratigraphic and biostratigraphic analyses have been made on the newly recognized Bua-bai limestone and the type Cribas Group in Timor, the Noonkanbah Formation in the Canning Basin, the Byro Group in the Merlinleigh Sub-basin of the Southern Carnarvon Basin, and the Carynginia Formation in the northern Perth Basin. In Timor the succession, which is highly disrupted by faulting, was deposited under open-marine conditions probably in a shelf–basin setting. Restricted, very shallow-water seas flooded the Canning Basin and the Merlinleigh–Byro–Irwin sub-basins of the Southern Carnarvon and northern Perth basins and had highly variable oxygen levels and salinities typical of estuarine environments. A similar pattern of warming and bathymetric change is recognized in all studied basins. During the early part of the late Artinskian cool conditions prevailed, with water temperatures 0–4 °C forming sea ice in the Merlinleigh–Byro–Irwin rift. Rapid warming during the latter part of the late Artinskian was accompanied by maximum marine flooding close to the Artinskian–Kungurian boundary. Climatic and bathymetric conditions then allowed carbonate mounds, with larger fusulines and a variety of algae, to develop in the northern part of the rift system, and Tubiphytes, conodonts, and brachiopods with Tethyan affinities to migrate into the marginal-rift basins despite the generally adverse water ... |
format |
Text |
author |
Davydov, Vladimir I. |
author_facet |
Davydov, Vladimir I. |
author_sort |
Davydov, Vladimir I. |
title |
Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
title_short |
Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
title_full |
Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
title_fullStr |
Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
title_full_unstemmed |
Late Artinskian–Early Kungurian (Early Permian) Warming and Maximum Marine Flooding in the East Gondwana Interior Rift, Timor and Western Australia, and Comparisons Across East Gondwana |
title_sort |
late artinskian–early kungurian (early permian) warming and maximum marine flooding in the east gondwana interior rift, timor and western australia, and comparisons across east gondwana |
publisher |
ScholarWorks |
publishDate |
2017 |
url |
https://scholarworks.boisestate.edu/geo_facpubs/325 https://doi.org/10.1016/j.palaeo.2016.11.051 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Geosciences Faculty Publications and Presentations |
op_relation |
https://scholarworks.boisestate.edu/geo_facpubs/325 https://doi.org/10.1016/j.palaeo.2016.11.051 |
op_doi |
https://doi.org/10.1016/j.palaeo.2016.11.051 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
468 |
container_start_page |
88 |
op_container_end_page |
121 |
_version_ |
1782340214742581248 |