Resurfacing on Venus
نویسندگان
چکیده
منابع مشابه
The resurfacing history of Venus: Constraints from buffered crater densities
Because of atmospheric shielding and endogenic resurfacing, the population of impact craters on Venus is small (about a thousand) and consists of large craters. This population has been used in numerous studies with the goal of deciphering the geologic and geodynamic history of Venus, but the nearly spatially random nature of the crater population has complicated efforts to understand this hist...
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The range of surface ages on Venus and the rate of recent volcanism are two major questions that can be addressed through an analysis of Magellan images. We report on a 3-D Monte Carlo resurfacing model that seeks to explain the resurfacing history of Venus by simulating the evolving surface under the competing processes of impact cratering and volcanism. By incorporating the observed size dist...
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...
متن کاملVolcanically embayed craters on Venus: testing the catastrophic and equilibrium resurfacing models
Two major types of volcanic units, older regional plains and younger lobate plains, make up 50% of the surface of Venus and represent different epochs of volcanism. The abundance of impact craters partially embayed from the exterior by each of these two types of units permits the testing of the key points of the model of equilibrium resurfacing. The proportion of craters embayed by the older re...
متن کاملDoublet craters on Venus
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...
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ژورنال
عنوان ژورنال: Planetary and Space Science
سال: 2010
ISSN: 0032-0633
DOI: 10.1016/j.pss.2010.05.022