Eocene climate record of a high southern latitude continental shelf: Seymour Island, Antarctica

2008 ◽  
Vol 120 (5-6) ◽  
pp. 659-678 ◽  
Author(s):  
L. C. Ivany ◽  
K. C. Lohmann ◽  
F. Hasiuk ◽  
D. B. Blake ◽  
A. Glass ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Climate Record ◽  
Southern Latitude ◽  
High Southern Latitude ◽  
Seymour Island

High southern latitude paleotemperatures recorded by Paleogene bivalves

GFF ◽  
2000 ◽  
Vol 122 (1) ◽  
pp. 43-43
Author(s):  
Andrea L. Dutton ◽  
Kyger C Lohmann ◽  
William J. Zinsmeister
Keyword(s):  
Southern Latitude ◽  
High Southern Latitude

scholarly journals Diversity and Distribution Patterns in High Southern Latitude Sponges

PLoS ONE ◽  
2012 ◽  
Vol 7 (7) ◽  
pp. e41672 ◽  
Author(s):  
Rachel V. Downey ◽  
Huw J. Griffiths ◽  
Katrin Linse ◽  
Dorte Janussen
Keyword(s):  
Distribution Patterns ◽  
Southern Latitude ◽  
High Southern Latitude

scholarly journals Paleomagnetic field properties at high southern latitude

2009 ◽  
Vol 10 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
K. P. Lawrence ◽  
L. Tauxe ◽  
H. Staudigel ◽  
C. G. Constable ◽  
A. Koppers ◽  
...  
Keyword(s):  
Southern Latitude ◽  
High Southern Latitude

scholarly journals Aerosols Observations with a new lidar station in Punta Arenas, Chile

2018 ◽  
Vol 176 ◽  
pp. 05038 ◽  
Author(s):  
Boris Barja ◽  
Felix Zamorano ◽  
Pablo Ristori ◽  
Lidia Otero ◽  
Eduardo Quel ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Statistical Analyses ◽  
Cold Environment ◽  
Lidar System ◽  
Austral Spring ◽  
Southern Latitude ◽  
High Southern Latitude ◽  
Collaboration Project

A tropospheric lidar system was installed in Punta Arenas, Chile (53.13°S, 70.88°W) in September 2016 under the collaboration project SAVERNET (Chile, Japan and Argentina) to monitor the atmosphere. Statistical analyses of the clouds and aerosols behavior and some cases of dust detected with lidar, at these high southern latitude and cold environment regions during three months (austral spring) are discussed using information from satellite, modelling and solar radiation ground measurements.

A new glypheid lobster from the Late Cretaceous of Hawke's Bay, New Zealand

2012 ◽  
Vol 86 (1) ◽  
pp. 126-128
Author(s):  
Rodney M. Feldmann ◽  
Jeffrey D. Stilwell
Keyword(s):  
New Species ◽  
New Zealand ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Southern Latitude ◽  
High Southern Latitude ◽  
Definition Of ◽  
A New Species

Recognition of a fossil previously identified as a “large Cretaceous beetle” as a glypheid lobster permits the definition of a new species, Glyphea wiffenae. The specimen was collected from the richly fossiliferous, Upper Cretaceous Maungataniwa Sandstone in eastern North Island, New Zealand. Several other fossil decapods with high southern latitude affinities have been described previously from the unit, supporting the placement of the Zealandia region within the Weddellian Biotic Province. This is only the fourth glypheid known from New Zealand and the first Cretaceous occurrence of the genus in the country.

scholarly journals Evolution and extinction of Maastrichtian (Late Cretaceous) cephalopods from the López de Bertodano Formation, Seymour Island, Antarctica

2018 ◽  
Author(s):  
James Witts ◽  
Vanessa C. Bowman ◽  
Paul Wignall ◽  
J. Alistair Crame ◽  
Jane Francis ◽  
...  
Keyword(s):  
Sea Level ◽  
Environmental Changes ◽  
Planktonic Foraminifera ◽  
Seawater Temperature ◽  
Range Data ◽  
Widespread Species ◽  
Southern Latitude ◽  
The Family ◽  
Extinction Event ◽  
Seymour Island

One of the most expanded records to contain the final fortunes of ammonoid cephalopods is within the López de Bertodano Formation of Seymour Island, James Ross Basin, Antarctica. Located at ~65º South now, and during the Cretaceous, this sequence is the highest southern latitude onshore outcrop containing the Cretaceous–Paleogene (K–Pg) transition. We present comprehensive new biostratigraphic range data for 14 ammonite and one nautiloid species based on the collection of >700 macrofossils from high-resolution sampling of parallel sedimentary sections, dated Maastrichtian to earliest Danian in age, across southern Seymour Island. We find evidence for only a single, abrupt pulse of cephalopod extinction at the end of the Cretaceous when the final seven ammonite species disappeared, consistent with most evidence globally. In the lead up to the K–Pg extinction in the James Ross Basin, starting during the Campanian, ammonite diversity decreased overall, but the number of endemic taxa belonging to the family Kossmaticeratidae actually increased. This pattern continued into the Maastrichtian and may be facies controlled, linked to changes in sea level and seawater temperature. During the early Maastrichtian, ammonite diversity dropped significantly with only two species recorded from the basal López de Bertodano Formation on Seymour Island. The subsequent diversification of endemic taxa and reappearance of long-ranging, widespread species into the basin resulted in an increase in ammonite diversity and abundance during the mid-Maastrichtian. This was coincident with an apparent period of warming temperatures and sea level rise interpreted from palynology and sedimentology, perhaps reflecting a high latitude expression of the Mid-Maastrichtian Event. Late Maastrichtian diversity levels remained stable despite reported climatic and environmental variation. Ammonite diversity patterns during the Maastrichtian parallel those of microfossil species such as nannofossil and planktonic foraminifera, suggesting that dynamic climatic and environmental changes affected many planktonic and nektonic organisms during the latest Cretaceous. However, we suggest that these perturbations had a minimal effect on overall diversity prior to the catastrophic extinction event at the K–Pg boundary.

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