Venus resurfacing by coronae: Implications from impact craters
نویسندگان
چکیده
منابع مشابه
Uplift of Venus Geoid Highs: Timing from Coronae and Craters
Introduction: Crater distribution on Venus indicates that the surface has undergone global-scale resurfacing in a short period of time [1]. Determining the timing of events has been difficult due to the near-random crater pattern. Some progress has been made in the relative dating of various types of features [2,3,4]. In addition, current deformation of Venus' surface has been described as a sw...
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Of the impact craters on Earth larger than 20 km in diameter, 10–15% (3 out of 28) are doublets, having been formed by the simultaneous impact of two well-separated projectiles. The most likely scenario for their formation is the impact of well-separated binary asteroids. If a population of binary asteroids is capable of striking the Earth, it should also be able to hit the other terrestrial pl...
متن کاملImpact craters on regional plains on Venus: Age relations with wrinkle ridges and implications for the geological evolution of Venus
[1] A global assessment of impact craters on Venus 30 km in diameter shows that 146 craters are completely or partially superposed on the regional plains that dominate the surface and typically are deformed by wrinkle ridges. In this study, we found that 10 of these craters are deformed by wrinkle ridges (pre-WR), 93 craters are superposed on wrinkle ridges (post-WR), and 43 craters were found ...
متن کاملFloor-fractured impact craters on Venus: Implications for igneous crater modification and local magmatism
Regional tectonism and volcanism affect crater modification and crater loss on Venus, but a comparison of Venusian craters to lunar floor-fractured craters uggests that a third style of more localized, crater-controlled magmatism also may occur on Venus. Based on lunar models for such magmatism, Venusian crustal conditions hould generally favor crater-filling volcanism over crater-centered floo...
متن کاملEmbayed Craters on Venus: How Do They Correspond to the Catastrophic and Equilibrium Resurfacing Models?
Introduction: The style and rate of resurfacing on Venus is among the key problem in the geologic history of this planet. There are two alternative models of resurfacing. The first is the model of catastrophic resurfacing [1]. It states that at some specific point (say, ~500 Ma ago) the entire surface of Venus was renewed and the observable population of crates began to accumulate. The model of...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 1997
ISSN: 0094-8276
DOI: 10.1029/97gl00687