Results 121 to 130 of about 164,975 (347)

High‐Pressure Transformations and Stability of Ferromagnesite in the Earth's Mantle

open access: yesGeophysical Monograph Series, Page 105-113., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Eglantine Boulard   +2 more
wiley  

+3 more sources

Dome Craters on Ganymede and Callisto May Form by Topographic Relaxation of Pit Craters Aided by Remnant Impact Heat [PDF]

open access: yesJournal of Geophysical Research: Planets, 2024, Vol. 129, e2023JE008258
The icy Galilean satellites display impact crater morphologies that are rare in the Solar System. They deviate from the archetypal sequence of crater morphologies as a function of size found on rocky bodies and other icy satellites: they exhibit central pits in place of peaks, followed by central dome craters, anomalous dome craters, penepalimpsests ...
arxiv   +1 more source

Bilateral symmetry of circular impact structures of astroblemes [PDF]

open access: yes
The relief of the true crater-bottom and the distribution of impactites and allogenic breccias for the Popigay and Kara astroblemes is examined. It is shown that the crater morphology and the distribution of ejecta of fragmented and melted masses has a ...
Masaytis, V. L., Mashchak, M. S.
core   +1 more source

A Study of Meteoroid Impact Phenomena [PDF]

open access: yes, 1963
Process of crater formation resulting from impact of hypervelocity projectile - meteoroid ...
Kirchner, H. P., Rae, W. J.
core   +1 more source

Theoretical Research Progress in High-Velocity/Hypervelocity Impact on Semi-Infinite Targets

open access: yesShock and Vibration, 2015
With the hypervelocity kinetic weapon and hypersonic cruise missiles research projects being carried out, the damage mechanism for high-velocity/hypervelocity projectile impact on semi-infinite targets has become the research keystone in impact dynamics.
Yunhou Sun   +3 more
doaj   +1 more source

Seasonal patterns of phytoplankton photoacclimation in a dimictic oligotrophic lake over 5 yr: Implications for chlorophyll as an estimate of biomass

open access: yesLimnology and Oceanography, EarlyView.
Abstract Chlorophyll a is commonly used as a surrogate for algal biomass in lakes and oceans even though phytoplankton can readily adjust intracellular chlorophyll concentration to changes in the environment through a cellular process termed photoacclimation.
Scott Girdner, Joshua Sprague
wiley   +1 more source

Crater Morphometry on Callisto

open access: yesThe Planetary Science Journal
Impact crater formation is affected by the physical properties of planetary crusts, allowing comparison of crater dimensions to serve as a proxy for comparing the crustal properties of different planetary bodies.
V. J. Bray, P. M. Schenk
doaj   +1 more source

Small simple impact craters [PDF]

open access: yesarXiv, 2010
The paper discusses some examples of image processing applied to improve optical satellite imagery of small craters (Kamil, Veevers, Haviland). The examples show that image processing can be quite useful for further in-situ researches, because the resultant imagery helps to have a better picture of the crater shape and of the distribution of debris ...
arxiv  

Increasing acidification does not affect sexual reproduction of a solitary zooxanthellate coral transplanted at a carbon dioxide vent

open access: yesLimnology and Oceanography, EarlyView.
Abstract The absorption of atmospheric carbon dioxide is causing significant changes to the carbonate chemistry of the ocean, in a phenomenon called ocean acidification. The latter makes it potentially more difficult for marine calcifiers like corals, to build their calcium carbonate structures, thus affecting their ability to survive and reproduce ...
Chiara Marchini   +11 more
wiley   +1 more source

Dropping the Ball: The effect of anisotropic granular materials on ejecta and impact crater shape [PDF]

open access: yesarXiv, 2013
In this fluid dynamics video, we present an experimental investigation of the shape of impact craters in granular materials. Complex crater shapes, including polygons, have been observed in many terrestrial planets as well as moons and asteroids. We release spherical projectiles from different heights above a granular bed (sand).
arxiv  

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