Results 31 to 40 of about 8,311,841 (367)
On the importance of self-secondaries
Geoscience Letters, 2018 Self-secondaries are secondary craters that are formed on both the continuous ejecta deposits and interior of the parent crater. The possible existence of self-secondaries was proposed in the late 1960s, but their identity, formation mechanism, and ...
Zhiyong Xiao
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Organic matter from the Chicxulub crater exacerbated the K–Pg impact winter
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance Burn markers are observed in many records of the Cretaceous–Paleogene asteroid impact and mass extinction event. These materials could be derived from wildfires on land or from sedimentary rocks hit by the asteroid.
S. Lyons +7 more
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A comparative analysis of two Early Palaeozoic marine impact structures in Estonia, Baltic Sea: Neugrund and Kärdla [PDF]
Bulletin of the Geological Society of Finland, 2013 Kärdla and Neugrund are two Early Palaeozoic offshore impact structures located some 50 km apart along the Estonian coast of the Baltic Sea. They share many similarities but differing features are also found. The Kärdla impact structure is located at the
S. Suuroja, K. Suuroja, T. Flodén
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Morphology Scaling of Drop Impact onto a Granular Layer
, 2010 We investigate the impact of a free-falling water drop onto a granular layer. First, we constructed a phase diagram of crater shapes with two control parameters, impact speed and grain size.
Katuragi, Hiroaki, 桂木, 洋光
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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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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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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
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The Sedimentary records of the Hapcheon impact crater basin in Korea over the past 1.3 Ma
Frontiers in Earth Science, 2023 The Hapcheon impact crater is the only meteorite impact crater identified on the Korean peninsula. However, the morphology of the impact crater and the nature of the meteorite collision are unknown. In this study, we analyzed the sedimentary facies using
Jin-Young Lee +6 more
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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
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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
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