Results 71 to 80 of about 3,716 (202)
, 2023 Zircon morphology parameters reflect the physicochemical conditions during crystallization and can be modified by different processes. Zircon populations from Miocene–Pliocene ignimbrites of the Central Anatolian Volcanic Province (CAVP) were studied to ...
LÜTFİYE AKIN, AKIN, LÜTFİYE
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Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.Abstract Distributed basaltic volcanic fields commonly host minor but significant silicic magmas, the origin of which remains debated. At Harrat Khaybar (western Saudi Arabia; ca. 1.7 Ma to present), volcanic activity erupted compositions range from alkali olivine basalt to trachyte and comendite.
Abdullah Alohali +5 more
wiley +1 more source
Revista Mexicana de Ciencias Geológicas, 2019 Igneous rocks of the Sierra Madre Occidental have been mapped and dated along latitude 24° N between Mazatlán and Durango City and near latitude 28° N in Chihuahua.
Fred W. McDowell, Stephen E. Clabaugh
doaj
Late Precambrian ignimbrites on the Avalon Peninsula, Newfoundland
, 1969 The predominantly volcanic Harbour Main Group of Late Precambrian age, forming a broad northerly trending belt in the central part of the Avalon Peninsula of Newfoundland, includes some well-developed ignimbrites.
V. S. Papezik
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Tectonics, Volume 45, Issue 10, October 2026.Abstract Detrital zircon U–Pb geochronology from Triassic–Jurassic basins in the New England Orogen (NEO) constrains sediment provenance and episodic continental arc evolution along the eastern Gondwanan margin. Dominant zircon clusters at 270–230 Ma and 340–300 Ma in these basins were likely sourced from contemporaneous magmatism in the NEO ...
Yanxiong Zhang +2 more
wiley +1 more source
Impacto ambiental en el geosistema de las canteras de sillar de Añashuayco – Arequipa
Espacio y Desarrollo, 2007 The quarries of Añashuayco are located northwest of the city of Arequipa on a peneplain formedby ignimbrites and alluvionic deposits.The geomorphology of the area is made by a traversal quebrada coming down from the Chachani volcano until its contact ...
Carlos César Trujillo Vera
doaj
Earth, Planets and SpaceThe Youngest (74 ka) Toba Tuff (YTT) super-eruption is traditionally interpreted as a single, short-lived event. However, new paleomagnetic data from both southern and northern non-welded exposures of YTT’s Units 2, 3, and 4 (in ascending order ...
Gabriela Nogo Retnaningtyas Bunga Naen +6 more
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, 1993 The Roque Nublo non-welded ignimbrites - which are Pliocene in age (5-3.5 Ma.) - are characteristic deposits of the second magmatic cycle on Gran Canaria.
Massare, D +3 more
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, 2021 During the Mio-Pliocene between ca. 10 and 5 Ma, the Central Anatolian Volcanic Province (CAVP) formed as the focus of a high eruptive flux episode with voluminous high-silica, caldera-forming eruptions.
ÇUBUKÇU, HÜSEYİN EVREN +5 more
core +1 more source
Geotechnical features of the welded ignimbrites of the Canary Islands
, 2007 First geotechnical data of two pyroclastic deposits are provided: The Arico (Tenerife) and Arucas (Gran Canaria) welded ignimbrites. Average data are summarized for different coloured specimens. Ultrasonic wave velocity varies between a maximum of 4741 m/
Hernandez-Gutierrez, L. E. +2 more
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