Crust top 50 km venus the surface of venus also seems

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Crust: top 50 km?
VenusThe surface of Venus also seems tohave features similar to those seen onEarth. There are two major highlandregions Ishtar Terra in the North andAphrodite Terra nearer the Equator ofVenus. There are also mountain likestructures (referred to as ‘Mons’)
There are roughly 900craters visible on Venus.This is not a particularlylarge number, and theytend to beconcentrated incertain regions.This is evidence thatsomething mustbe resurfacing the faceof this planet.Since there is no wateranywhere on thesurface, the most likelyphenomenon to changethe surface isvolcanic activityIshtar TerraAphrodite Terra
This Magellan image is centered at 74.6 degrees north latitude and 177.3 east longitude,in the northeastern Atalanta Region of Venus. Image Credit: NASA/JPLThere are no small craters on Venus,the smallest we find is about 3kilometres in size.Why would that be?
This Magellan image is centered at 74.6 degrees north latitude and 177.3 east longitude,in the northeastern Atalanta Region of Venus. Image Credit: NASA/JPLThe nature of the craters is related tothe surface conditions.Because of the thick atmosphereobjects need to be of a much largersize to reach the surface without‘burning up’ - the smallest craterswe see are 3 km acrossAlso the small number of craters andother evidence suggests the surfaceis at most 1 billion years old andpossibly as little as 500 million years.
VenusEven though Venus seems to havea similar surface and interior, there areno major plate tectonicsas we see onEarth.There are some signs of stress andfracture on the surface10.1007%2F978-1-4614-9213-9_439-1Coronae
VenusEven though Venus seems to havea similar surface and interior, there areno major plate tectonicsas we see onEarth.But, if Venus and Earth are similar in theirinterior, why didn’t it develop major platetectonics?This may be the result of a crust thatis either too thick to break into the platesOR that the crust is too thin
VenusAnother factor may be the lack ofwater, as water also acts as a lubricanton Earth to help the plates moveThe high atmospheric temperaturesmay also play a role as it means there isless of a temperature difference betweenthe interior and the surface.
VenusInstead of plate tectonics on a largescale if heat then builds up under thecrust, we may see periods in Venus’geological history where large portions ofthe surface melt as the heat builds upunder the crust, and/or largescale volcanic activity takes place.
Volcanic VenusWe see a number of structuresthat seem to be volcanic innature. There are structuresthat seem to be shieldtype volcanoes on the surfaceas well as structures calledcoronae, where lava seems tobe welling up to the surface.
Venus may have ONGOING Volcanism!

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