Results 41 to 50 of about 5,185 (202)

Carbon isotope geochemistry of organic matter in volcanic paleosols constrains paleo‐environmental variations

Journal of Quaternary Science, EarlyView.
ABSTRACT The Fiorano quarry paleosol developed within the Colli Albani volcanic district (Italy) in the time interval bracketed by the deposition of the Pozzolanelle pyroclastic‐flow unit (365 ± 4 ka) and the emplacement of the Capo di Bove lava flow (277 ± 2 ka).
Eduardo Di Marcantonio, Luca Aldega, Luigi Dallai, Mario Gaeta, Fabrizio Marra   +4 more
wiley   +1 more source

FORMAÇÃO SERRA DA BOCAINA - CONTRIBUIÇÃO DO VULCANISMO PALEOPROTEROZOICO DO ARCO MAGMÁTICO AMOGUIJÁ NO TERRENO RIO APA, SUL DO CRÁTON AMAZÔNICO

Geochimica Brasiliensis, 2017
The Serra da Bocaina Formation comprises Paleoproterozoic effusive and pyroclastic rocks displaying well preserved textures related to a plutonic-volcanic event recorded in the southern of the Amazonian Craton in the Rio Apa Terrane.
Cinthya Deus Souza, Maria Zélia Aguiar Sousa, Amarildo Salina Ruiz, Maria Elisa Fróes Batata, Ana Flávia Nunes Brittes, Jean Michel Lafon   +5 more
doaj   +1 more source

High‐resolution three‐dimensional ground‐penetrating radar imaging of surface masonry arrangement in frescoed Roman walls at Pompeii

Near Surface Geophysics, EarlyView.
Abstract The widespread presence of frescoes in newly excavated domus at Pompeii conceals the wall masonry arrangement, preventing direct geometric survey while excluding invasive diagnostic approaches. Reliable knowledge of masonry geometry is nonetheless essential for structural assessment and conservation planning in a seismically active region ...
Sara Donzelli, Lorenza Petrini, Stefano Munda, Maurizio Lualdi   +3 more
wiley   +1 more source

The Polychnitos ignimbrite of Lesvos island [PDF]

, 2001
Miocene volcanism on Lesvos was particularly explosive giving rise to two extensive pyroclastic formations, the Sigri pyroclastics to the west and the Polychnitos ignimbrite to the east of the island.
VAMVOUKAKIS, C., PE-PIPER, G., LAMERA, S., KOULl, M., PARASKEVAS, E., SEYMOUR, K. ST.   +5 more
core  

Rare Earth Element Potential in the Araí Rift Metavolcanic, Central Brazil: Gamma‐Ray Signatures, Mineralogy and Exploration Implications

Terra Nova, EarlyView.
ABSTRACT Although central Brazil hosts significant ion‐adsorption rare earth element (REE) deposits associated with A‐type granites, their coeval volcanic counterparts have been largely overlooked as exploration targets. This study demonstrates that acidic metavolcanic rocks of the Araí Group share strong radiometric, geochemical and mineralogical ...
Yuri Ribeiro, Nilson Francisquini Botelho, Valmir da Silva Souza, Diego Guilherme da Costa Gomes   +3 more
wiley   +1 more source

Paleoproterozoic (~1.88Ga) felsic volcanism of the Iricoumé Group in the Pitinga Mining District area, Amazonian Craton, Brazil: insights in ancient volcanic processes from field and petrologic data

Anais da Academia Brasileira de Ciências, 2011
The Iricoumé Group correspond to the most expressive Paleoproterozoic volcanism in the Guyana Shield, Amazonian craton. The volcanics are coeval with Mapuera granitoids, and belong to the Uatumã magmatism.
Ronaldo Pierosan, Evandro F. Lima, Lauro V.S. Nardi, Cristina P. de Campos, Artur C. Bastos Neto, José M.T.M. Ferron, Maurício Prado   +6 more
doaj   +1 more source

Mineralogical and petrological features of the Cemilköy ignimbrite, Cappadocia, Turkey

, 2018
The Cemilkoy ignimbrite is one of the voluminous ignimbrite deposits in Cappadocia. The Cemilkoy ignimbrite contains pumice and lithic clasts of volcanic and ophiolitic origin in an ash matrix. The unwelded Cemilkoy ignimbrite is distinguished from other
Abidin Temel, TEMEL, ABİDİN, Gullu Deniz Dogan-Kulahci, Alain Gourgaud, Dogan-Kulahci, GÜLLÜ DENİZ, GOURGAUD, Alain   +5 more
core   +1 more source

Geological and Geomorphological Evaluation of Melendiz Stream Basin

Selçuk Üniversitesi Sosyal Bilimler Enstitüsü Dergisi, 2018
The research area is the Melendiz Stream Basin in Aksaray. Melendiz Stream Basin is located in the Lake Tuz Closed Endorheic Basin. The Ihlara Valley part of the basin is included in the Cappadocia tourism zone.
Halil Mesut Baylak, Recep Bozyiğit
doaj  

Fabrication and Mechanical Evaluation of Eco-Friendly Geopolymeric Mortars Derived from Ignimbrite and Demolition Waste from the Construction Industry in Peru

Geosciences
Ignimbrite rock is a volcanic material located in the Arequipa region (Peru), and for centuries, it has been used as a construction material, giving a characteristic light pastel, white to pink color to the city of Arequipa, with white being the most ...
Fredy Alberto Huamán-Mamani, Cris Katherin Palomino-Ñaupa, María del Mar Orta Cuevas, Santiago Medina-Carrasco   +3 more
doaj   +1 more source

Paleomagnetic constraint of the age and duration of the Taupō Eruption, New Zealand

Earth, Planets and Space, 2023
We have carried out paleomagnetic analyses of tephras from the Taupō eruption, one of the most violent eruptions on Earth in the past 5000 years. Pyroclastic deposits were collected with 7 cm3 cubes pushed into each unit of the Taupō eruption sequence ...
Takeshi Hasegawa, Annika Greve, Darren M. Gravley, Chie Kusu, Yasuaki Kaneda, Shohei Shibata, Makoto Okada, Szabolcs Kósik, Nobutatsu Mochizuki, Gillian Turner   +9 more
doaj   +1 more source