Results 91 to 100 of about 14,904 (246)

DEM based examination of pediment levels: a case study in Bükkalja, Hungary

Hungarian Geographical Bulletin, 2011
Bükkalja is the southern pediment of Bükk Mountains. According to the geographic literature this area is divided into two pediment (geomorphic) levels.
János Vágó, András Hegedűs
doaj  

Phylogenetic and Functional Substrate Specificity for Endolithic Microbial Communities in hyper-arid environments

Frontiers in Microbiology, 2016
Under extreme water deficit, endolithic (inside rock) microbial ecosystems are considered environmental refuges for life in cold and hot deserts, yet their diversity and functional adaptations remain vastly unexplored.
Alexander eCrits-Christoph, Courtney K Robinson, Bing eMA, Jacques eRavel, Jacek eWierzchos, Carmen eAscaso, Octavio eArtieda, Virginia eSouza-Egipsy, Cristina eCasero, Jocelyne eDiRuggiero   +9 more
doaj   +1 more source

Stratigraphy and age of the Cappadocia ignimbrites, Turkey: reconciling field constraints with paleontologic, radiochronologic, geochemical and paleomagnetic data [PDF]

, 2005
The stratigraphy and age of the Neogene Cappadocia ignimbrites (Central Turkey) have been inferred in previous studies from fieldwork and K–Ar age determinations.
Bourdier, Jean-Louis, Froger, J.L., Gourgaud, Alain, Le Pennec, Jean-Luc, Sen, Sevket, Temel, A.   +5 more
core   +3 more sources

Ignimbrite flare-up in Late Cretaceous–Paleocene Japan empowered by hot mantle inflow

Progress in Earth and Planetary Science
The contribution of subduction parameters, mantle flow, and magmatic systems to the triggering of ignimbrite flare-ups is poorly understood. A re-examination of spatiotemporal variations in igneous activity and Sr–Nd isotopic compositions through ...
Ken Yamaoka, Tokiyuki Morohoshi, Daisuke Sato, Kazuto Mikuni   +3 more
doaj   +1 more source

Synthesis and Characterization of a Photocatalytic Material from TiO₂ Nanoparticles Supported on Zeolite Obtained from Ignimbrite Residue Used in Decolorization of Methyl Orange

Applied Sciences
In the present work, a TiO2/zeolite photocatalyst was synthesized by dispersing TiO2 nanoparticles obtained through the sol-gel method onto the surface of natural zeolite derived from ignimbrite residue. The zeolite was obtained from an ignimbrite rubble
Gianina Huayna, Antonio Laura, Rossibel Churata, Luis Lazo, Rivalino Guzmán, Pierre G. Ramos, Juan M. Rodriguez   +6 more
doaj   +1 more source

Synchronisation of sedimentary records using tephra : a postglacial tephrochronological model for the Chilean Lake District [PDF]

, 2016
Well-characterised tephra horizons deposited in various sedimentary environments provide a means of synchronising sedimentary archives. The use of tephra as a chronological tool is however still widely underutilised in southern Chile and Argentina.
Abarzúa, Ana M, Bertrand, Sebastien, De Batist, Marc, Fontijn, Karen, Heirman, Katrien, Mather, Tamsin A, Moernaut, Jasper, Moreno, Hugo, Naranjo, Jose-Antonio, Pyle, David M, Rawson, Harriet, Van Daele, Maarten   +11 more
core   +2 more sources

Rapid caldera subsidence and fluctuating eruption dynamics: the lithostratigraphy and structure of the Loch Bà Caldera, Isle of Mull, NW Scotland

Volcanica
Caldera-forming eruptions represent extremely hazardous events. The Loch Bà Caldera on the Isle of Mull, NW Scotland, preserves an ~120 m thick sequence of Palaeogene silicic pyroclastic rocks and collapse breccias.
Peter Nicholls, David Brown, Ross Dymock
doaj   +1 more source

Where geology meets pedology: Late Quaternary tephras, loess, and paleosols in the Mamaku Plateau and Lake Rerewhakaaitu areas [PDF]

, 2012
On this trip we focus on tephrostratigraphy and soil stratigraphy together with aspects of palaeoenvironmental reconstruction over long and short time-spans.
Lanigan, Kerri Miriam, Lowe, David J., Palmer, David John   +2 more
core  

Magnetostratigraphy of the volcanic sequence of Río Grande de Santiago-Sierra de la Primavera region, Jalisco, western Mexico [PDF]

Geofísica Internacional, 2000
New paleomagnetic results for 13 sites in volcanic units from Huaxtla, Paso de Guadalupe and Lazo sections in the Río Grande de Santiago (RGS) canyon and for 5 sites in the silicic center of Sierra de la Primavera (SP) are used to document a preliminary ...
S. Sánchez Reyes, S. Venegas Salgado, C. Caballero Miranda, A.M. Soler Arechalde, A. Goguitchaichvili, O. Campos Enríquez, L. M. Alva Valdivia, J. Rosas Elguera, J. Urrutia Fucugauchi   +8 more
doaj  

Physical characteristics of tephra layers in the deep sea realm: the Campanian Ignimbrite eruption

, 2014
Tephra deposits in the deep sea can survive undisturbed for long periods of time and, on regional scales, tend to be much better preserved than their subaerial counterparts.
S. Engwell, R. Sparks, S. Carey
semanticscholar   +1 more source