Results 41 to 50 of about 34,448 (232)
Influence of palaeoweathering on trace metal concentrations and environmental proxies in black shales [PDF]
, 2017 The mineralogical and chemical compositions of Lower Carboniferous (Tournaisian) marine black shale from the Kowala quarry, the Holy Cross Mountains, Poland, were investigated.
Agnieszka Pisarzowska +128 more
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Devonian Sandstone Lithostratigraphy, Northern Arkansas [PDF]
, 1977 Two areas of Devonian sandstone development may be recognized in northern Arkansas. In northwestern Arkansas, the Clifty Formation comprises a massively bedded, super mature quartz arenite of Middle Devonian age overlain by thinner bedded, phosphatic ...
Hall, Jeffery D., Manger, Walter L.
core +2 more sources
Geochemistry and origin of organic-rich sediment veins in fractured granitic basement, Helmsdale, Sutherlandshire, UK [PDF]
, 2017 Acknowledgements MB is in receipt of a PhD studentship from the Petroleum Technology Development Fund of Nigeria. LB is supported by NERC grant NE/M010953/1. C. Taylor, W. Ritchie and J. Johnston provided skilled technical support.
Baba, Mas'Ud +3 more
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The Anatomical Record, EarlyView.Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley +1 more source
FishesMacropetalichthys rapheidolabis Norwood and Owen, 1846 (Placodermi: Petalichthyida), type species of Macropetalichthys Norwood and Owen, 1846, was based on a single cranial roof from the Devonian of southeastern Indiana.
Loren E. Babcock
doaj +1 more source
Известия высших учебных заведений: Геология и разведка, 2019 Three stages, namely Middle Devonian (I), Early Late Devonian (II) and Late Late Devonian (III), are distin-guished in the evolution of antiarchs (Placodermi, Antiarchi) in the Middle-Late Devonian of Northern Eurasia.
S. V. Moloshnikov
doaj +1 more source
Devonian stratigraphy in Estonia: current state and problems [PDF]
Estonian Journal of Earth Sciences, 2012 An updated version of the Devonian stratigraphical chart of Estonia with comments is presented. Estonian regional stratigraphical units are correlated with the standard conodont zonation and miospore zonation, used in the western part of the East ...
Elga Mark-Kurik, Anne Põldvere
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro +1 more
wiley +1 more source
A Middle Devonian Callixylon (Archaeopteridales) from Ronquières, Belgium [PDF]
Review of Palaeobotany and Palynology, 2012 article i nfo A permineralized Callixylon trunk is reported from Ronquieres, a mid to late Givetian (Middle Devonian) locality from Belgium. The specimen consists of an 80 cm long trunk adpression whose central area is pre- served as a pyrite permineralization. The pyritized area is composed of a eustele surrounded by secondary xylem.
Cornet, Luc +3 more
openaire +3 more sources
Geochemical and ecological aspects of lower Frasnian pyrite-ammonoid level at Kostomłoty (Holy Cross Mountains, Poland) [PDF]
, 2004 The lower Frasnian (transitans Zone with Ancyrodella priamosica = MN 4 Zone) rhythmic basin succession of marly limestones and shales (upper Szydlówek Beds) at Kostomloty, western Holy CrossMts., Central Poland, contains a record of the transgressive ...
Bond, D.P.G. +3 more
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