Mixed siliceous-carbonate sedimentation in a Late Cretaceous epeiric sea: New evidence from the eastern Russian Platform

2018 ◽  
Vol 289 (3) ◽  
pp. 237-248 ◽  
Author(s):  
Svetlana O. Zorina ◽  
Lenar S. Khabipyanov ◽  
Nadezhda I. Afanasieva ◽  
Natalia V. Sokerina ◽  
Igor A. Perovskiy ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Russian Platform ◽  
Carbonate Sedimentation ◽  
Epeiric Sea ◽  
New Evidence

scholarly journals A new small deinonychosaur (Dinosauria: Theropoda) from the Late Cretaceous of Patagônia, Argentina

2011 ◽  
Vol 83 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Juan D. Porfiri ◽  
Jorge O. Calvo ◽  
Domenica dos Santos
Keyword(s):  
Late Cretaceous ◽  
Taxonomic Diversity ◽  
South American ◽  
New Material ◽  
New Evidence

Here we report on a new small deinonychosaurian theropod, Pamparaptor micros gen. et sp. nov., from the Late Cretaceous of Patagônia, Argentina. Pamparaptor micros exhibits a pedal structure previously unknown among South Américan deinonychosaurians. The new material provides new evidence about the morphology and taxonomic diversity of Patagônian deinonychosaurs. Pamparaptor is the smaller non-avialae Patagônian deinonychosaur, probably with about 0.50-0.70 meters, long. The pedal construction resembles, that of Troodontid or basal Dromaeosaurids. Nevertheless, up to now, we considered Pamparaptor a peculiar Patagônian Dromaeosaurid with troodontid-like pes.

scholarly journals STRONG TERRESTRIAL INFLUENCE ON THE LATE CRETACEOUS TETHYAN–ATLANTIC EPEIRIC SEA IN THE UPPER BENUE TROUGH, NORTHEASTERN NIGERIA

2016 ◽  
Author(s):  
Mohamed K. Zobaa ◽  
◽  
Yunis B. Valdon ◽  
Yunis B. Valdon ◽  
Francisca E. Oboh-Ikuenobe ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Benue Trough ◽  
Epeiric Sea

The fossil record of Cunoniaceae: new evidence from Late Cretaceous wood of Antarctica?

2000 ◽  
Vol 111 (1-2) ◽  
pp. 127-144 ◽  
Author(s):  
Imogen Poole ◽  
David J. Cantrill ◽  
Peta Hayes ◽  
Jane Francis
Keyword(s):  
Late Cretaceous ◽  
Fossil Record ◽  
New Evidence

Late Cretaceous–Cenozoic subduction–collision history of the Southern Neotethys: new evidence from the Çağlayancerit area, SE Turkey

2015 ◽  
Vol 105 (1) ◽  
pp. 315-337 ◽  
Author(s):  
Ahmet Can Akıncı ◽  
Alastair H. F. Robertson ◽  
Ulvi Can Ünlügenç
Keyword(s):  
Late Cretaceous ◽  
History Of ◽  
Se Turkey ◽  
New Evidence

New evidence concerning avian origins from the Late Cretaceous of Patagonia

Nature ◽  
1997 ◽  
Vol 387 (6631) ◽  
pp. 390-392 ◽  
Author(s):  
Fernando E. Novas ◽  
Pablo F. Puertat
Keyword(s):  
Late Cretaceous ◽  
New Evidence

scholarly journals New evidence from exceptionally “well-preserved” specimens sheds light on the structure of the ammonite brachial crown

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
C. P. A. Smith ◽  
N. H. Landman ◽  
J. Bardin ◽  
I. Kruta
Keyword(s):  
Late Cretaceous ◽  
Large Family ◽  
Soft Body ◽  
Evolutionary Origins ◽  
Data Analyses ◽  
Tomographic Data ◽  
First Time ◽  
New Evidence ◽  
Topological Data

AbstractAmmonite soft body remains are rarely preserved. One of the biggest enigmas is the morphology of the ammonite brachial crown that has, up till now, never been recovered. Recently, mysterious hook-like structures have been reported in multiple specimens of Scaphitidae, a large family of heteromorph Late Cretaceous ammonites. A previous examination of these structures revealed that they belong to the ammonites. Their nature, however, remained elusive. Here, we exploit tomographic data to study their arrangement in space in order to clarify this matter. After using topological data analyses and comparing their morphology, number, and distribution to other known cephalopod structures, in both extant and extinct taxa, we conclude that these hook-like structures represent part of the brachial crown armature. Therefore, it appears that there are at least three independent evolutionary origins of hooks: in belemnoids, oegospids, and now in ammonites. Finally, we propose for the first time a hypothetical reconstruction of an ammonite brachial crown.

A SUMMARY OF THE PETROLEUM GEOLOGY OF THE CARNARVON BASIN

1974 ◽  
Vol 14 (1) ◽  
pp. 66
Author(s):  
B. M. Thomas ◽  
D. N. Smith
Keyword(s):  
Late Cretaceous ◽  
Petroleum Exploration ◽  
Continental Margins ◽  
Carbonate Sediments ◽  
Carbonate Sedimentation ◽  
Northern Carnarvon Basin ◽  
Shelf Sedimentation ◽  
Block Faulting ◽  
Commercial Oil ◽  
Carnarvon Basin

The Carnarvon Basin, an elongate crustal depression along the central West Australian coast line, contains a sedimentary record from the Silurian to the Recent. The southern part of the basin consists mainly of an area of downtaulted Palaeozoic sub-basins. The northern Carnarvon Basin is a major Mesozoic downwarp, containing a thich section of Triassic, Jurassic and Neocomian sediments. None of these is present in the south. All of the northern part of the basin and much of the southern Palaeozoic basins is covered by a blanket of Early Cretaceous shales and Late Cretaceous and Tertiary carbonates.The Palaeozoic was a time of tectonic stability when shallow marine shelf sedimentation predominated. The major structural trends now observed in the basin were developed during a Jurassic tensional regime. This was related to break-up of the continental margins when block faulting developed around the edges of the Precambrian Shield. Within the resulting Exmouth-Barrow-Dampier downvtarp there accumulated over 8000 m of Jurassic and Neocomian marine and fluvial sediment. During the Aptian, epeiric seas inundated the basin and by the Late Cretaceous, shelf carbonate sedimentation had become established.Progressive subsidence of the continental shelf has since allowed the accumulation of 3000 m of carbonate sediments along the present-day shelf edge.The present cycle of petroleum exploration in the basin began in 1952 when West Australian Petroleum Pty Limited (WAPET) was formed to operate on leases held by Ampol Petroleum Limited. A non-commercial oil discovery at Rough Range −1 followed in 1953, but it was not until 1964 that commercial quantities of oil were found at Barrow Island. In July 1971 the Burmah group of companies drilled North Rankin −1 the first of a series of giant gas-condensate discoveries on the Rankin Platform.

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