Results 81 to 90 of about 58,521 (270)

Devonian interval in Missouri [PDF]

Geological Society of America Bulletin, 1902
Introductory In central Missouri Carboniferous stratigraphy presents unusual relationships. Nowhere else in the whole region does the same succession of Paleozoic terranes prevail. Beginning with the typical Chouteau limestone as the basal member, the Carboniferous sequence rests directly on Ordovician dolomites. In other parts of the state the hiatus
openaire   +3 more sources

A Classification of Protective Structures in Fossil Bryozoans

Учёные записки Казанского университета: Серия Естественные науки
The protective structures of bryozoans representing four orders—Trepostomata, Cryptostomata, Fenestrata, and Cheilostomata—were analyzed and classified for the first time based on functional criteria.
Z. A. Tolokonnikova, P. V. Fedorov, D. M. Mikhnenko   +2 more
doaj   +1 more source

Lungfish‐like antero‐labial tooth addition and amphibian‐like enameloid‐enamel transition in the coronoid of a Devonian stem actinopterygian

Journal of Anatomy, EarlyView.
The tooth patterning logic, which cannot be inferred from surface morphology, is revealed by visualizing buried tooth remnants in 3D. The primary teeth are added labially, initially organized in radial rows, which transition into linear rows where the coronoid becomes slender.
Donglei Chen
wiley   +1 more source

First insights into the Devonian–Carboniferous boundary conodonts from the depression deposits of the Kama-Kinel Trough System, East European Platform (Volga-Ural petroleum province, Sarailinskaya Depression)

Учёные записки Казанского университета: Серия Естественные науки
Conodonts from the Devonian–Carboniferous boundary deposits in two wells within the Sarailinskaya Depression of the Kama-Kinel Trough System were studied.
G. M. Sungatullina, V. V. Silantiev, D. N. Miftakhutdinova, A. F. Safarov, M. F. Validov, B. G. Ganiev, K. D. Shumatbaev, R. M. Khabipov   +7 more
doaj   +1 more source

Convergent allometric trajectories in Devonian Carboniferous unornamented Polygnathus conodonts [PDF]

Acta Palaeontologica Polonica
The shape of feeding structures is reputed to be under functional constraints related to the processing of food particles. Their morphological variation through evolution and ontogeny may thus provide an insight into changes in occlu sal dynamics and ...
FÉLIX NESME, CATHERINE GIRARD, CARLO CORRADINI, SABRINA RENAUD   +3 more
doaj   +1 more source

Investigating Devonian trees as geo‐engineers of past climates: linking palaeosols to palaeobotany and experimental geobiology

, 2015
We present the rationale for a cross‐disciplinary investigation addressing the ‘Devonian plant hypothesis’ which proposes that the evolutionary appearance of trees with deep, complex rooting systems represents one of the major biotic feedbacks on ...
Jennifer L. Morris, J. Leake, W. Stein, C. M. Berry, J. Marshall, C. Wellman, J. Milton, S. Hillier, Frank Mannolini, Joe Quirk, D. Beerling   +10 more
semanticscholar   +1 more source

The Chamrousse Ophiolite (Western Alps, France): Relict of a Devono‐Carboniferous Ocean

Terra Nova, EarlyView.
ABSTRACT The Chamrousse ophiolite (Western Alps, France) is one of the best‐preserved Variscan relicts of Cambro‐Ordovician oceanisation within the northern Gondwana margin. This study presents new in situ U–Pb isotope analyses on zircon grains from that ophiolite, revealing that the oceanic stage in Chamrousse has occurred 150 Ma later than estimated.
Maureen Gunia, Carole Cordier, Emilie Janots, Adrien Vezinet, Valentine Milloud, Jean‐Baptiste Jacob, Stéphane Guillot   +6 more
wiley   +1 more source

The unique devonian sections of Dniepro-Donetsk cavity. Kolaidyntsy parametric well 413. Article 2

Мінеральні ресурси України, 2016
The article presents the results of comprehensive study materials drilling 413. When the actual depth of 5 104 m, it revealed the Anthropogenic, Quaternary, Neogene, Paleogene, Cretaceous, Jurassic, Triassic, Permian, Carbon and Devonian deposits which ...
V. A. Ivanyshyn, L. P. Kononenko, O. L. Rakovska, S. V. Onufryshyn, Z. G. Voloshyna   +4 more
doaj  

Was the Formation of the North Anatolian Fault Influenced by the Aegean Extension?

Terra Nova, EarlyView.
ABSTRACT The North Anatolian Fault (NAF), one of the most prominent plate boundary continental fault systems on Earth, facilitates the westward movement of the Anatolian microplate into the Aegean region. The temporal and spatial evolution of the NAF is important for understanding the mechanism of escape tectonics during plate interaction in active ...
I. Tonguç Uysal, Volkan Karabacak, Tunahan Aykut, Uwe Ring, Entao Liu, Taylan Sancar, Nicole Leonard, Kui Tong, Andrew J. Todd, Abidin Temel   +9 more
wiley   +1 more source

The evolution of muscle spindles

Experimental Physiology, EarlyView.
Abstract Muscle spindles are stretch‐sensitive mechanoreceptors found in the skeletal muscles of most four‐limbed vertebrates. They are unique amongst sensory receptors in the ability to regulate their sensitivity by contraction of the intrafusal muscle fibres on which the sensory endings lie.
Robert W. Banks, Uwe Proske
wiley   +1 more source