Results 51 to 60 of about 34,202 (186)

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

COACH CV: The Seven Clinical Phenotypes of Concussion

Brain Sciences, 2017
Our understanding of the diverse physiological manifestations of concussion is changing rapidly. This has an influence on the clinical assessment of patients who have sustained a concussion. The 2017 Consensus Statement on Concussion in Sport states that
Neil Craton, Haitham Ali, Stephane Lenoski   +2 more
doaj   +1 more source

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

Zoologica Scripta, EarlyView.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi, Vinícius A. São Pedro, Felipe Magalhães, Marcelo Gehara, Eliana F. Oliveira, Gabriel C. Costa, Frank T. Burbrink, Edward A. Myers, Guarino R. Colli, Miguel T. Rodrigues, Adrian A. Garda   +10 more
wiley   +1 more source

Episodic crustal growth in the Tanzania Craton: evidence from Nd isotope compositions

China Geology, 2018
: The analysis of available Nd isotope data from the Tanzania Craton places important constraints on the crust-mantle separation ages, and events marking juvenile crustal addition and crustal recycling. Nd model ages date the oldest crust extraction to 3.
Kai Sun, Lin-lin Zhang, Zhi-dan Zhao, Fu-qing He, Sheng-fei He, Xing-yuan Wu, Lei Qiu, Xiao-dong Ren   +7 more
doaj   +1 more source

Large geographic and temporal extensions of the Río de la Plata Craton, South America, and its metacratonic eastern margin

, 2019
Integration of existing isotopic and geological data allows a reconsideration of the distribution and age of the Río de la Plata Craton within South America.
J. Santos, C. J. Chernicoff, E. Zappettini, N. McNaughton, L. Hartmann   +4 more
semanticscholar   +1 more source

Essence of the Late Mesozoic ore-magmatic systems of Aldan Shield

Литосфера, 2016
The original cause of the Late Mesozoic tectonic-magmatic and mineragenic activation at the Pre-Cambrian Aldan Shield was the existence of the stagnated oceanic slab in the mantle transitional zone.
V. G. Khomich, N. G. Boriskina
doaj   +2 more sources

Sedimentology and stratigraphic correlation of Vendian deposits in the southwestern Siberian Craton: Major contribution of an exocratonic clastic source to sedimentary systems

Литосфера, 2018
The study focuses on the sedimentation and stratigraphy of a large Vendian (Ediacaran) sedimentary basin in the southwestern Siberian craton, with implications for the origin of its units and subunits.
Julius K. Sovetov
doaj   +1 more source

Chemical Significance and Chronology of Mesoproterozoic clastic rocks in Huainan Area

Chemical Engineering Transactions, 2018
After the 1.8Ga cracking event, the North China Craton entered the development stage of paraplatform, its southern margin, the Huainan area is in lack of accurate age data, so its stratigraphic sedimentation time limit has been controversial.
Shunshe Luo, Yulong Guan, Tongshan Wang, Qiqi Lyu, Rong Dai, Yan Zhang   +5 more
doaj   +1 more source

Association of quartz, Cr-pyrope and Cr-diopside in mantle xenolith in V.Grib kimberlite pipe (northern East European Platform): genetic models

Записки Горного института
The first results of mineralogical and geochemical studies of a unique xenolith of lithospheric mantle are presented illustrating the earlier non-described mineral association of quartz, Cr-pyrope and Cr-diopside.
Elena V. Agasheva, Denis S. Mikhailenko, Andrei V. Korsakov   +2 more
doaj  

Metamorphism during the Archean–Paleoproterozoic Transition Associated with Microblock Amalgamation in the Dharwar Craton, India

Journal of Petrology, 2018
Numerous tectonic scenarios have been proposed for terrane growth and accretion within the Archean Dharwar Craton, southern Peninsular India. Previously accepted interpretations involving a two-terrane model—comprising a Western Dharwar Craton (WDC) and ...
Shanshan Li, M. Santosh, R. Palin
semanticscholar   +1 more source