Results 101 to 110 of about 1,337,965 (296)

Resolving the biome debate: ecological and palaeo‐data concur that the extensive tree‐limited grassy biomes of central and north‐western Madagascar are largely anthropogenic

Biological Reviews, EarlyView.
ABSTRACT For millennia, human activities have transformed ecosystems globally. Determining which landscapes are predominantly anthropogenic is crucial to conservation and habitat restoration. Madagascar, a critically‐threatened biodiversity hotspot, is a prominent example.
Grant S. Joseph, Sean Hixon, Colleen L. Seymour, Laurie R. Godfrey, Miguel Pedrono, Karen E. Samonds, Andrinajoro R. Rakotoarivelo, Brooke E. Crowley   +7 more
wiley   +1 more source

Een archeologisch bureau-onderzoek aan de Hermesweg te Baarn (NH): ARC-Rapporten 2011-119

, 2011
De onderzoekslocatie ligt op de overgang van de Utrechtse heuvelrug naar de Eemvallei. Op de onderzoekslocatie wordt een vlakte van ten dele verspoelde dekzanden (vervlakt door veen en/of overstromingsmateriaal) verwacht.
Verboom-Jansen, M., Verboom-Jansen, M. (ARC)   +1 more
core   +1 more source

Peroxodisulfate‐Enhanced Leaching of Deep‐Sea Manganese Crusts and Sulfides

Chemie Ingenieur Technik, EarlyView.
Ammonium peroxodisulfate enables efficient leaching of deep‐sea manganese crusts and massive sulfides while offering electrolytic recycling. High leaching yields for V, Mn, Co, Mo, Sn, and W, along with complete leaching of As and Sb, highlight its potential as a powerful and sustainable oxidant for marine resource processing.
Bastian Hansel, Lucas Thumeyer, Ebbe H. Hartz, Håvard Hallås Stubseid, Peter Fröhlich, Martin Bertau   +5 more
wiley   +1 more source

Caracterização Geoquímica de Rochas Metamáficas e Metaultramáficas da FaixaPajeú-Paraíba, Província Borborema – NE Brasil. [PDF]

Anuário do Instituto de Geociências, 2009
Concordant lenses of high pressure metaultramafic and metamafic rocks are positioned in Paleoproterozoic migmatites and orthogneisses of the Pajeú-Paraíba belt, Borborema Province, northeast Brazil.
Cícera Neysi de Almeida, Ignez de Pinho Guimarães, Hartmut Beurlen, Werner Topitsch   +3 more
doaj  

On the origin of the North Pacific arcs [PDF]

, 2004
We present a new hypothesis that relates global plate tectonics to the formation of marginal basins, island arcs, spreading ridges and arc-shaped mountain belts around the North Pacific Ocean.
Rodríguez-Perea, Antonio, Gelabert Ferrer, Bernadí, Fornós, Joan J. (Joan Josep), RODRÍGUEZ PEREA, A., Rodríguez Perea, Antonio, SÀBAT, F., Gelabert, B., Gelabert Ferrer, Bernardí, Sàbat i Montserrat, Francesc, Fornós, Joan J., Sàbat Montserrat, F.   +10 more
core   +1 more source

Differential sensitivity to SHH signaling and neural crest‐mediated Gas1 expression regulate jaw size during development and evolution

Developmental Dynamics, EarlyView.
Abstract Background Developmental control of jaw size is crucial to prevent birth defects and facilitate evolutionary adaptation. We have shown that jaw size is established by neural crest mesenchyme (NCM), which are progenitor cells that migrate into the mandibular primordia and produce the jaws.
Zuzana Vavrušová, Daniel B. Chu, An Nguyen, Yeniko Ta, Jennifer L. Fish, Richard A. Schneider   +5 more
wiley   +1 more source

THE NEOPROTEROZOIC ISLAND-ARC ASSOCIATION OF THE MUKODEK GOLD-ORE FIELD, NORTHERN BAIKAL AREA

Геодинамика и тектонофизика, 2015
Metamorphosed volcanic rocks of the Ushmukan suite were studied in the Mukodek gold-ore field located in the Baikal-Muya belt in the Northern Baikal area, Russia. The Ushmukan suite shows interleaving of ortoschists which compositions are widely variable.
V. A. Vanin, D. P. Gladkochub, T. V. Donskaya   +2 more
doaj   +1 more source

Orthodentine‐osteodentine and osteocytic‐anosteocytic transition inferred from Silurian stem chondrichthyan dermal jawbones with ever‐white teeth overgrown by brown denticles

Developmental Dynamics, EarlyView.
Abstract Background The dentigerous jawbones of a 423‐million‐year‐old stem chondrichthyan (ischnacanthid acanthodian) carry a characteristic combination of multi‐row non‐shedding white teeth with brownish overgrowing denticles. The color distinction makes it a good model for observing the interaction between two odontode lineages, but the nature of ...
Jia‐Cih Kang, Henning Blom, Tiiu Märss, Donglei Chen   +3 more
wiley   +1 more source

Slab steepening and rapid mantle wedge replacement during back-arc rifting in the New Hebrides

Nature Communications
The effects of the composition and angle of the subducting slab and mantle wedge flow on tectonic and magmatic processes in island arcs and associated back-arcs are poorly understood.
Karsten M. Haase, Marcel Regelous, Christoph Beier, Anthony A. P. Koppers   +3 more
doaj   +1 more source

Geochemistry and tectonic setting of volcanic rocks in the Mahiroud volcano-plutonic complex, Southeast of Sarbisheh (Eastern Iran) [PDF]

پترولوژی
Introduction Mahiroud volcano-plutonic complex as an anticline (Lahnu-Mahiroud) forms a part of the Sistan suture zone (SiSuZ), and lies in the northern part of the Sistan suture zone (SiSuZ). According to Tirrul et al.
Sahar Benrashidiyan, Ahmad Ahmadi Khalaji, Peyman Eskandarnia, Shahriar Keshtgar, Zahra Tahmasbi   +4 more
doaj   +1 more source