Results 41 to 50 of about 16,412 (215)

Terrestrial analogs and thermal models for Martian flood lavas [PDF]

, 2000
The recent flood lavas on Mars appear to have a characteristic “platy-ridged” surface morphology different from that inferred for most terrestrial continental flood basalt flows.
A. S. McEwen, Arya, Bird, Booth, Cattermole, Crisp, Crisp, Davies, Edgett, Edgett, Fink, Glaze, Goncharov, Greeley, Greeley, Greeley, Harmon, Harmon, Hartmann, Hartmann, Hartmann, Hill, Hon, Hooper, Hulme, Jakobsson, Jerram, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Keszthelyi, Kilburn, L. Keszthelyi, Macdonald, Macdougall, Malin, Mangan, Martin, McEwen, McEwen, McEwen, McEwen, Mouginis-Mark, Muhleman, Oskarsson, Peterson, Pieri, Plescia, Reidel, Rowland, Sakimoto, Sakimoto, Scott, Scott, Self, Self, Shaw, Smith, Spence, Steingrímsson, Stephenson, Swanson, T. Thordarson, Theilig, Thorarinsson, Thordarson, Thordarson, Thordarson, Tolan, Wadge, Walker, Ward, Wilson, Wilson, Woods, Zielinski   +77 more
core   +1 more source

Assessment of motion-induced fluidization of dense pyroclastic gravity currents

Annals of Geophysics, 2005
The paper addresses some fundamental aspects of the dynamics of dense granular flows down inclines relevant to pyroclastic density currents. A simple mechanistic framework is presented to analyze the dynamics of the frontal zone, with a focus ...
P. Salatino
doaj   +1 more source

A stress-controlled mechanism for the intensity of very large magnitude explosive eruptions [PDF]

, 2011
Large magnitude explosive eruptions are the result of the rapid and large-scale transport of silicic magma stored in the Earth's crust, but the mechanics of erupting teratonnes of silicic magma remain poorly understood.
Costa, Antonio, Gottsmann, Joachim, Melnik, Oleg, Sparks, R. S. J.   +3 more
core   +1 more source

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

“Antarctic on fire”: Paleo-wildfire events associated with volcanic deposits in the Antarctic Peninsula during the Late Cretaceous

Frontiers in Earth Science, 2023
The occurrence of paleo-wildfire events during the Campanian age of the Late Cretaceous is demonstrated in this study for the first time with deposits from the King George Island, South Shetland Islands, Antarctic Peninsula.
Joseline Manfroi, Joseline Manfroi, Joseline Manfroi, Cristine Trevisan, Tânia Lindner Dutra, André Jasper, Marcelo De Araujo Carvalho, Francisco Eliseu Aquino, Marcelo Leppe   +8 more
doaj   +1 more source

Geochemical and Geological Investigation of Skarn‐Type Pb–Zn Mineralization in Hastanetepe (Balya‐Balıkesir, Türkiye): An Approach Based on Fluid Inclusions, Sulphur Isotopes and Geochemical Data

Geological Journal, EarlyView.
Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley   +1 more source

Dynamical weakening of pyroclastic flows by mechanical vibrations

EPJ Web of Conferences, 2017
Dynamical weakening of dense granular flows plays a critical role on diverse geological events such as seismic faulting and landslides. A common feature of these processes is the development of fluid-solid relative flows that could lead to fluidization ...
Valverde Jose Manuel, Soria-Hoyo Carlos, Roche Olivier   +2 more
doaj   +1 more source

Vibration-induced dynamical weakening of pyroclastic flows: Insights from rotating drum experiments [PDF]

, 2015
Pyroclastic flows are characterized by their high mobility, which is often attributed to gas fluidization of the usually fine and/or low-density particles.
Soria del Hoyo, Carlos, Valverde Millán, José Manuel   +1 more
core   +1 more source

Isolation, Insularity and Resilience: A Review of the Geophysical, Socioeconomic, and Environmental Vulnerabilities of Gran Canaria and Lesvos Islands for Policy Interventions to Global Change

Sustainable Development, EarlyView.
ABSTRACT The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development.
Toheeb Lekan Jolaosho, Mazen Marouani, Takwa Boughanmi   +2 more
wiley   +1 more source

Influences of hydrological and hydrogeological conditions on debris flows in peri-vesuvian hillslopes [PDF]

Natural Hazards and Earth System Sciences, 2002
The paper illustrates some results of research carried out to assess factors triggering debris flows which involve the pyroclastic overburdens covering carbonate mountains around Vesuvius.
P. De Vita, V. Piscopo
doaj