Results 11 to 20 of about 9,024 (216)

Tectonic forcings of Maastrichtian ocean‐climate evolution [PDF]

open access: yesPaleoceanography, 1999
A global compilation of deep‐sea isotopic records suggests that Maastrichtian ocean‐climate evolution was technically driven. During the early Maastrichtian the Atlantic intermediate‐deep ocean was isolated from the Pacific, Indian, and Southern Oceans; deep water formed in the high‐latitude North Atlantic and North Pacific.
Frank, T. D., Arthur, M. A.
openaire   +6 more sources

Deep water in the late Maastrichtian ocean [PDF]

open access: yesPaleoceanography, 2002
Stable isotopic data from benthic foraminifera indicate the occurrence of at least three deepwater masses in the late Maastrichtian ocean. Given mean oceanic δ18Ow of −1.0‰, the temperature of the coolest intermediate‐depth waters was 5°–7°C, that of the deepest waters was 10°C, and that of the warmest intermediate waters was 13°–15°C.
D'Hondt, Steven, Arthur, Michael A.
openaire   +3 more sources

Maastrichtian ammonites from Balochistan, Pakistan

open access: yesJournal of Paleontology, 1999
Maastrichtian ammonites are described from two areas in Pakistan. The upper part of the lower unit of the Korara Shale in the southern Pab Range, Kirthar Province, southern Balochistan, is dated as Late Maastrichtian, based on the presence ofMenuites fresvillensis(Seunes, 1890), which is accompanied by abundantIndoceras baluchistanenseNoetling, 1897 ...
Fatmi, A, Kennedy, W
openaire   +3 more sources

Widespread complex enameloid microstructure in teeth and rostral denticles of Cretaceous sclerorhynchoid skates (Rajiformes: †Sclerorhynchoidei). [PDF]

open access: yesJ Anat
This article demonstrates that the teeth and rostral denticles of an extinct clade of sawfish‐like skates display an extremely derived enameloid microstructure, similar to what is known among sharks. The presence of tooth‐like enameloid microstructure in dermal denticles opens new perspectives about the origins and development of chondrichthyan ...
Chateauneuf-Gautier E, Guinot G.
europepmc   +2 more sources

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+4 more sources

Serratolamna serrata (Agassiz) (Pisces, Neoselachii) from the Maastrichtian (Late Cretaceous) of Jamaica [PDF]

open access: yes
Three teeth of the shark Serratolamna serrata (Agassiz) from the Guinea Corn Formation (Central Inlier) represent the first recorded occurrence of fossil sharks within the Cretaceous of Jamaica.
Underwood, Charlie J., Mitchell, S.F.
core   +5 more sources

Stratigraphy of the type Maastrichtian – a synthesis

open access: yes, 2012
A synthesis of the stratigraphy of the Maastrichtian Stage in its extended type area, that is, southern Limburg (the Netherlands), and adjacent Belgian and German territories, is presented with a brief historical overview. Quarrying activities at the large quarry complex of ENCI-HeidelbergCement Group will officially come to an end on July 1, 2018 ...
Jagt, J.W.M. (John), Jagt-Yazykova, E.A.
openaire   +2 more sources

PETROGRAPHY AND MINERALOGY OF THE ATTARAT UM GHUDRAN OIL SHALE, CENTRAL JORDAN; pp. 110–128 [PDF]

open access: yesOil Shale, 2017
In the authors’ recent papers on oil shale chemical composition and geochemical variability, as well natural gamma radiation, the sig­nificantly variable layered lithological structure of the up to 90 m thick oil shale (OS) unit of the Muwaqqar Chalk ...
MARE KONSA   +4 more
doaj   +1 more source

MICRO-BIOSTRATIGRAPHY OF SOME UPPER CRETACEOUS SUCCESSIONS IN THE EASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2006
This paper deals with the biostratigraphic significance of nannofossil species recorded from some Maastrichtian rocks in the Eastern Desert, Upper Egypt.
Ahmed Sami El-Dawoody
doaj   +1 more source

Systematic and biostratigraphic evaluation of the Late Cretaceous benthic foraminiferal assemblages of southeastern Batman

open access: yesBulletin of the Mineral Research and Exploration, 2021
The study area is located in 15 km west of Gercüş town (southeast of Batman) at the northern margin of the Arabian Plate. This region is the only place where Garzan formation, one of the important petroleum reservoir of the Southeastern Anatolia ...
Derya Sinanoğlu
doaj   +1 more source

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