Shark and ray teeth from the Hauterivian (Lower Cretaceous) of north‐east England [PDF]
Palaeontology, 1999 Sampling of hiatal horizons within the Hauterivian part of the Speeton Clay Formation of north‐east England has produced teeth of several species of sharks and rays, four of which are previously unnamed. One species of shark, Cretorectolobus doylei sp. nov., and two species of rays, Spathobatis rugosus sp. nov. and Dasyatis speetonensis sp.
Underwood, Charlie J. +2 more
openaire +4 more sources
Hauterivian shallow marine calcareous biogenic mounds: S.E. Spain [PDF]
Palaeogeography, Palaeoclimatology, Palaeoecology, 1995 Hauterivian biogenic deposits from the Prebetic northern margin near Caudete (Albacete Province, southeastern Spain) are represented by low domed bodies, less than 10 m thick, surrounded by bioclastic sediments and capped by siliciclastics. They consist of a coral, stromatoporoid and microbial framework with cavities filled by mud, rapidly
Arias, Consuelo +2 more
openaire +7 more sources
Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism
Geophysical Monograph Series, Page 247-262., 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.
Lawrence M. E. Percival +3 more
wiley +3 more sources
Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]
Plant Environ InteractExponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc +2 more sources
The stepwise rise of angiosperm-dominated terrestrial ecosystems. [PDF]
Biol Rev Camb Philos SocABSTRACT Angiosperms are the most diverse and abundant plant taxon today and dominate the majority of Earth's terrestrial ecosystems. They underwent rapid divergence and biogeographic expansion from the early to the middle Cretaceous. Yet, transformative ecosystem change brought about by the increased ecological dominance of angiosperms unfolded ...
Ding W +5 more
europepmc +2 more sources
Lower Cretaceous (Hauterivian-Albian) ammonite biostratigraphy in the Maestrat Basin (E Spain) [PDF]
, 2014 Peer reviewedPublisher ...
Bover-Arnal, T. +11 more
core +4 more sources
Swiss Journal of Geosciences, 2022 From latest Hauterivian to latest Barremian, the Urgonian facies of the Swiss and French Jura Mountains are subdivided into three formations and five members: new Saars Formation (= former “Gorges de l’Orbe Formation” sensu Strasser et al., 2016; Pictet,
Pierre‑Olivier Mojon, Eric De Kaenel
doaj +1 more source
Facial-paleogeographic reconstructions of the Valanginian-Hauterivian strata belonging to the Lower Cretaceous Gydan Peninsula and the western part of the Yenisei-Khatanga regional foredeep [PDF]
Нефтегазовая геология: Теория и практика, 2021 Paleogeographic reconstructions were carried out, sedimentation models were determined, and facies-paleogeographic maps were constructed for the Valanginian-Hauterivian clinoform structures of the Lower Cretaceous of the Gydan Peninsula and the western ...
Taninskaya N.V. +7 more
doaj +1 more source
Habitat Availability, Jurassic and Cretaceous Origins of the Deep-Bodied Shark Morphotype and the Rise of Pelagic Sharks. [PDF]
Ecol EvolWe find support for a benthic origin of sharks, with four discrete transitions towards pelagic‐type morphology occurring during the Jurassic and Cretaceous. Increased habitat availability driven by biotic and abiotic environmental change may have driven shifts towards pelagic‐type morphology. These results may help explain discordance between molecular
Gayford JH +5 more
europepmc +2 more sources
Valanginian to Barremian Benthic Foraminifera from ODP Site 766 (Leg 123, Indian Ocean) [PDF]
, 1995 A Valanginian to Barremian bathyal foraminiferal assemblage (118 taxa belonging to 51 genera) is documented from ODP Site 766, drilled near the foot of the Exmouth Plateau off northwest Australia.
Holbourn, A.E.L., Kaminski, M.A.
core +1 more source