Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Virgil L. Sharpton"'
Publikováno v:
Meteoritics & Planetary Science. 53:726-740
We review the methods and data sets used to determine morphometric parameters related to the depth (e.g., rim height and cavity depth) and diameter of Martian craters over the past ~45 yr, and discuss the limitations of shadow length measurements, ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c5e0b0f85a4411c2fffe606074d3e06
https://doi.org/10.1111/maps.12895
https://doi.org/10.1111/maps.12895
Publikováno v:
Icarus. 280:172-182
Venus’ highlands appear much brighter than its lowland plains in reflected radar, which has been explained by several conflicting hypotheses. We study this transition at higher spatial and elevation resolution than previously possible by combining
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75fb87de15358895bed4d26005362b23
https://doi.org/10.1016/j.icarus.2016.07.001
https://doi.org/10.1016/j.icarus.2016.07.001
Autor:
Virgil L. Sharpton
Publikováno v:
Journal of Geophysical Research: Planets. 119:154-168
The raised rims of impact craters consist of ejecta deposited onto structurally uplifted target rocks. Although it is commonly accepted that ejecta makes up 50–75% of the total rim height, no previous measurements on well-preserved, naturally occur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2dab0f230b4c536b3a7fbd9fa975ba4
https://doi.org/10.1002/2013je004523
https://doi.org/10.1002/2013je004523
Publikováno v:
Meteoritics & Planetary Science. 48:806-818
The Terny impact structure, located in central Ukraine, displays a variety of diagnostic indicators of shock metamorphism, including shatter cones, planar deformation features in quartz, diaplectic glass, selective melting of minerals, and whole rock
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44cda856521d835aa9a435a84ad2221d
https://doi.org/10.1111/maps.12107
https://doi.org/10.1111/maps.12107
Autor:
Virgil L. Sharpton, John E. Chappelow
Publikováno v:
Icarus. 184:424-435
Through a combination of aerobraking (drag deceleration) and ablation, meteoroids which enter planetary atmospheres may be slowed sufficiently to soft-land as meteorites. Results of an earlier study suggest that the current 6 mbar atmosphere of Mars
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efe4812f7aeeabf09bed93ed9e5ccac2
https://doi.org/10.1016/j.icarus.2006.05.013
https://doi.org/10.1016/j.icarus.2006.05.013
Autor:
John E. Chappelow, Virgil L. Sharpton
Publikováno v:
Icarus. 178:40-55
Planetary atmospheres influence cratering rates at small diameters (∼2–250 m) by filtering impactor populations via ablation, aerobraking and breakup of entering objects. The atmosphere of Mars undergoes rapid and drastic obliquity-driven variati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f95a4f72125a598a261fbfc1b23073d8
https://doi.org/10.1016/j.icarus.2005.03.010
https://doi.org/10.1016/j.icarus.2005.03.010
Publikováno v:
Meteoritics & Planetary Science. 39:857-878
The impact breccias encountered in drill hole Yaxcopoil-1 (Yax-1) in the Chicxulub impact structure have been subdivided into six units. The two uppermost units are redeposited suevite and suevite, and together are only 28 m thick. The two units belo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78c6a120d3e197a2a78b30eeafa4459d
https://doi.org/10.1111/j.1945-5100.2004.tb00935.x
https://doi.org/10.1111/j.1945-5100.2004.tb00935.x
Autor:
B. Dressler, Dieter Stöffler, Jo Morgan, D. Moran, Jan Smit, Jaime Urrutia, R. Buffler, Virgil L. Sharpton
Publikováno v:
Dressler, B O, Buffler, R, Morgan, J, Moran-Zenteno, D, Sharpton, V L, Smit, J, Stöffler, D & Urrutia, J 2003, ' Investigating a 65-Ma Old smoking gun: Deep drilling of the Chicxulub impact structure ', EOS, vol. 84, no. 14, pp. 125-130 . https://doi.org/10.1029/2003eo140001
EOS, 84(14), 125-130. American Geophysical Union
EOS, 84(14), 125-130. American Geophysical Union
The Phanerozoic paleontological record is marked by several biological extinction events. One of them,at the Cretaceous/Tertiary (K/T) boundary was responsible for the demise of about 50% of genera and 75% of species, including the dinosaurs.These dr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d6595bbe734bf40a903aa6f3eaae709
https://doi.org/10.1029/2003eo140001
https://doi.org/10.1029/2003eo140001
Autor:
John E. Chappelow, Virgil L. Sharpton
Publikováno v:
Meteoritics & Planetary Science. 37:479-486
The lengths of the shadows cast within simple, bowl-shaped impact craters have been used to constrain their depths on a variety of planetary bodies. This technique, however, only yields the "true" crater depth if the shadow transects the crater cente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::575aa5ac220e42aef3cededff78fb006
https://doi.org/10.1111/j.1945-5100.2002.tb00834.x
https://doi.org/10.1111/j.1945-5100.2002.tb00834.x