Results 21 to 30 of about 68,393 (238)
Microbial Life in Impact Craters [PDF]
Current Issues in Molecular Biology, 2020 Asteroid and comet impacts are known to have caused profound disruption to multicellular life, yet their influence on habitats for microorganisms, which comprise the majority of Earth's biomass, is less well understood. Of particular interest are geological changes in the target lithology at and near the point of impact that can persist for billions of
Cockell, Charles S. +4 more
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Degradation of small simple and large complex lunar craters: Not a simple scale dependence [PDF]
, 2020 The crater record of a planetary surface unit is often analyzed by its cumulative size‐frequency distribution (CSFD). Measuring CSFDs involves traditional approaches, such as traditional crater counting (TCC) and buffered crater counting (BCC), as well ...
Hiesinger, Harald +10 more
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A Possible Second Large Subglacial Impact Crater in Northwest Greenland
Geophysical Research Letters, 2019 Following the discovery of the Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, we explored satellite and aerogeophysical data in search of additional such craters.
Joseph A. MacGregor +7 more
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Polygonal impact craters on Ganymede
Meteoritics & Planetary Science, 2023 AbstractPolygonal impact craters (PICs) are unique geological features observed on various planetary bodies and constitute a small percentage of the impact crater population. This study focuses on PICs on Ganymede, where no such craters have been investigated so far. Here we present the distribution of PICs, examine their morphological characteristics,
Namitha Rose Baby +3 more
openaire +6 more sources
Cluster-induced crater formation
, 2008 Using molecular-dynamics simulation, we study the crater volumes induced by energetic impacts ($v= 1- 250$ km/s) of projectiles containing up to N=1000 atoms.
Aderjan +28 more
core +1 more source
Low-speed impact craters in loose granular media [PDF]
, 2003 We report on craters formed by balls dropped into dry, non-cohesive, granular media. By explicit variation of ball density $\rho_{b}$, diameter $D_{b}$, and drop height $H$, the crater diameter is confirmed to scale as the 1/4 power of the energy of the ...
D. J. Durian +10 more
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Discovery of the Hailin impact crater in northeast China
Matter and Radiation at ExtremesA uniquely shaped impact structure, the Hailin impact crater, has been discovered in northeast China. The crater was formed on a granodiorite hillside and is an oval depression with asymmetric rim height and a maximum diameter of 1360 m.
Feng Yin +3 more
doaj +1 more source
Remote SensingSurface unloading due to impact cratering results in lava filling the crater floor. Elevation differences in the crater floor, a common geological phenomenon on the Moon, represent direct evidence of cratering processes.
Feng Liu, Yuanxu Ma, Guanghao Ha
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地质科技通报, 2021 At present, there are more than 190 craters have been confirmed on the earth, and most of the simple impact craters with a diameter of less than 1 km are formed by iron impactor.There is a large amount of iron meteorite material around the impact crater ...
Jingyue Cui +4 more
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A steeply-inclined trajectory for the Chicxulub impact
Nature Communications, 2020 The authors here present a 3D model that simulates the formation of the Chicxulub impact crater. Based on asymmetries in the subsurface structure of the Chicxulub crater, the authors diagnose impact angle and direction and suggest a steeply inclined (60°
G. S. Collins +7 more
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