Results 51 to 60 of about 88,421 (298)

Petrology of Yaluninogorsk granitoid massive (Alapaevsk-Sukhoi Log porphyry copper zone, Middle Urals)

open access: yesЛитосфера, 2018
Yaluninogorsk quartz diorite-trondhjemite massif is situated in Alapaevsk-Sukhoy Log zone of Eastern-Ural High potentially productive for Cu (±Mo) porphyry type of mineralization. The massif is a magma chamber 3 × 2 km under central type volcano.
Sergei V. Pribavkin   +2 more
doaj   +1 more source

Peuplements paléolithiques et paléoenvironnements pléistocènes dans le Massif central

open access: yesArchéopages, 2022
During the last decades, the deployment of preventive operations related to ancient Prehistory in Auvergne permitted the exposure of many sites, whose contribution appears to be complementary to that of great historic locations.
Gérard Vernet, Raphaël Angevin
doaj   +1 more source

Taxonomic results of the Bryotrop expedition to Zaire and Rwanda : 26., a new checklist of the mosses of Central Africa [PDF]

open access: yes, 1993
Central Africa was one of the first regions in the tropics, if not the first, for which a checklist of mosses was compiled. In 1940, Demaret published the "Prodrome des Bryophytes du Congo Belge et du Ruanda-Urundi", followed by a supplement in 1946.
Born, S., Frahm, Jan-Peter, Pócs, Tamas
core  

The role of GPR techniques in determining ice cave properties: Peña Castil ice cave, Picos de Europa [PDF]

open access: yes, 2016
Producción CientíficaThe structure and ice content of ice caves are poorly understood. Ground penetrating radar (GPR) can provide useful insights but has only rarely been applied to ice caves.
Gómez Lende, Manuel   +3 more
core   +2 more sources

Raman Line Scan Analyses and a New Hypothesis for the Formation of Anatase‐Hosting Microbialites: Study of the Stromatolites From Saint‐Jean‐de‐la‐Rivière, Cotentin, France

open access: yesJournal of Raman Spectroscopy, EarlyView.
Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley   +1 more source

Note sur la présence de Corydalis intermedia (L.) Mérat dans le massif du Mézenc (département de l’Ardèche)

open access: yesBIOM
Corydalis intermedia (L.) Mérat est signalée sur le territoire du département de l’Ardèche (07), dans le massif du Mézenc. Des informations succinctes d’ordre chorologiques, historiques et écologiques sont fournies à propos de sa présence dans le Massif
Sébastien Antoine
doaj   +1 more source

La flore des forêts anciennes du Massif central

open access: yesRevue Forestière Française, 2017
Les forêts anciennes sont définies comme celles présentes sur les plus anciennes cartes disponibles, et ayant continuellement été boisées depuis sans subir de défrichement. Cette notion est indépendante de la gestion sylvicole pratiquée.
Léo Malzieu, Benoît Renaux
doaj   +1 more source

Végétations et successions végétales dans les monts du Devès (Haute-Loire, France) : esquisse phytosociologique et symphytosociologique d’un secteur volcanique méconnu

open access: yesBIOM, 2022
Le Devès est un plateau basaltique alti-ligérien d’âge Villafranchien, d’altitude élevée (environ 1100m), ponctué de cônes stromboliens et maars culminant au mont Devès (1417m).
Yves Meinard   +2 more
doaj   +1 more source

Two new charismatic Pristimantis species (Anura: Craugastoridae) from the tepuis of “The Lost World” (Pantepui region, South America) [PDF]

open access: yes, 2013
Two new colourful species of direct-developing frogs of the genus Pristimantis are described from the summit of two isolated tepuis (sandstone table mountains) in the Eastern Pantepui District of the Guiana Shield highlands. Pristimantis jamescameroni sp.
Kok, Philippe J. R.
core   +3 more sources

Evaluating the sustainability of mineral water consumption using multi‐scale hydrogeophysics in Caxambu, Brazil

open access: yesNear Surface Geophysics, EarlyView.
Abstract A better understanding of the near‐surface aquifer system of the Caxambu Water Park, located in the Minas Gerais State, Brazil, has been achieved. The study aimed to identify groundwater reservoirs and flow patterns and contribute to the hydrogeological conceptual model using a multi‐scale geophysical approach.
Emanuele F. La Terra   +5 more
wiley   +1 more source

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