Results 1 to 10 of about 21,586 (203)

Post-bottleneck increase in mitochondrial DNA diversity in Yaku sika deer (Cervus nippon yakushimae) on Yakushima Island, Japan [PDF]

open access: yesScientific Reports
We investigated the genetic diversity and divergence of sika deer (Cervus nippon) descended from survivors of a catastrophic pyroclastic flow event approximately 7,300 years ago by analyzing the 894 base pairs mitochondrial DNA control region extracted ...
Yoshimi Agetsuma-Yanagihara   +2 more
doaj   +2 more sources

The footprint of column collapse regimes on pyroclastic flow temperatures and plume heights [PDF]

open access: yesNature Communications, 2019
Pyroclastic density currents (PDCs) are a major threat during explosive volcanic eruptions, hence the possibility to forecast them would be a vital improvement for risk mitigation. Here the authors present a 3D flow model to quantify the thermal patterns
Matteo Trolese   +3 more
doaj   +2 more sources

Subaqueous volcanic eruptive facies, facies model and its reservoir significance in a continental lacustrine basin: A case from the Cretaceous in Chaganhua area of southern Songliao Basin, NE China

open access: yesPetroleum Exploration and Development, 2023
The conventional lithofacies and facies model of subaerial and marine pyroclastic rocks cannot reflect the characteristics of subaqueous volcanic edifice in lacustrine basins.
Xuanlong SHAN   +7 more
doaj   +1 more source

Physical properties of pyroclastic density currents: relevance, challenges and future directions

open access: yesFrontiers in Earth Science, 2023
Pyroclastic density currents (PDCs) are hazardous and destructive phenomena that pose a significant threat to communities living in the proximity of active volcanoes.
Thomas J. Jones   +10 more
doaj   +1 more source

Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China

open access: yesPetroleum Exploration and Development, 2022
By examining field outcrops, drilling cores and seismic data, it is concluded that the Middle and Late Permian “Emeishan basalts” in Western Sichuan Basin were developed in two large eruption cycles, and the two sets of igneous rocks are in unconformable
Hao PENG   +8 more
doaj   +1 more source

ANCAMAN ERUPSI KAWAH IJEN TERHADAP MASYARAKAT LERENG IJEN (KABUPATEN BONDOWOSO)

open access: yesASANKA, 2020
Ijen caldera complex is a volcano that has a 7 km diameter elliptical caldera which only leaving a northern caldera wall curving towards the southward.
Dhimas Bagus Virgiawan
doaj   +1 more source

IMEX_SfloW2D 1.0: a depth-averaged numerical flow model for pyroclastic avalanches [PDF]

open access: yesGeoscientific Model Development, 2019
Pyroclastic avalanches are a type of granular flow generated at active volcanoes by different mechanisms, including the collapse of steep pyroclastic deposits (e.g., scoria and ash cones), fountaining during moderately explosive eruptions, and crumbling ...
M. de' Michieli Vitturi   +3 more
doaj   +1 more source

Forensic Profiling Analogue Approach for the Investigation of Natural Hazards – A Case Study from Onokoba Elementary School, Unzen Volcano, Japan

open access: yesForum Geografi, 2021
Internal temperature variations of pyroclastic flows and their deposits are arguably the most challenging data to acquire. As a preliminary study of the temperature variation inside pyroclastic flows, the remains of Onokoba Elementary School (Shimabara ...
Balázs Bradák   +3 more
doaj   +1 more source

Evolution Magmatism of Nagasari Volcano Dieng, Central Java, Indonesia

open access: yesJGEET: Journal of Geoscience, Engineering, Environment and Technology, 2022
Nagasari Volcano, part of the Dieng volcanic complex, is one of the unique volcanoes in Central Java. Around this volcano grow eruption craters, volcanic cones, and pyroclastic flow ridges. There were several 14 eruption centers around Mount Nagasari, so
Dwi Fitri Yudiantoro   +6 more
doaj   +1 more source

The Arequita Formation (Lower Cretaceous): Petrographic features of the volcanic facies In the Laguna Merín Basin, east Uruguay

open access: yesLatin American Journal of Sedimentology and Basin Analysis, 2021
The southeastern border of the Laguna Merín Basin (Rocha Department, East Uruguay) consists of Mesozoic volcanic deposits of the Puerto Gómez and Arequita formations, overlain by a sedimentary cover of Cenozoic and recent deposits.
Rossana Muzio Sauer   +3 more
doaj   +2 more sources

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