Astronymus wrote:Looks like rock plates wobbling above calderae. As Venus has no earthlike tectonics this may be the way für the planet to release "pressure".
Venus may be a pressure cooker. Would explain all those vapors in the atmosphere.
Yes, Venus might be a pressure cooker.
I think that whether or not Venus is a pressure cooker
now, my guess is that it used to be like that in the past. Having no plate tectonics may indeed lead to the buildup of extreme stress in the crust.
I, too, think that the extremely thick greenhouse-gas atmosphere of Venus is most likely the product of massive volcanic eruptions.
Some time ago I saw a BBC documentary about huge extinction events in the Earth's past. A lot of attention was given to the catastrophe that befell the Earth about 65 million years ago, when a large space boulder hit our planet. Clear signs of that catastrophe can be found in an iridium layer in the bedrock in many places on the Earth.
Fascinatingly, though, the BBC documentary claimed that no signs of other major meteorite impacts have been found in the bedrock of the Earth, even though our planet has experienced several other extinction events. The largest known extinction event, known as the
Permian-Triassic extinction event, which killed some 90-96% of all species of the Earth, including the highly successful
trilobite, may have been caused by an extremely violent and prolonged series of
volcanic eruptions on the Earth, specifically in what is now Siberia.
Volcanism may be worse on Venus than on the Earth, thereby possibly explaining not only the terrible atmosphere of Venus but also, perhaps, the cylindrical mountains.
Ann
[quote="Astronymus"]Looks like rock plates wobbling above calderae. As Venus has no earthlike tectonics this may be the way für the planet to release "pressure".
Venus may be a pressure cooker. Would explain all those vapors in the atmosphere. :wink:[/quote]
Yes, Venus might be a pressure cooker.
I think that whether or not Venus is a pressure cooker [i]now[/i], my guess is that it used to be like that in the past. Having no plate tectonics may indeed lead to the buildup of extreme stress in the crust.
I, too, think that the extremely thick greenhouse-gas atmosphere of Venus is most likely the product of massive volcanic eruptions.
Some time ago I saw a BBC documentary about huge extinction events in the Earth's past. A lot of attention was given to the catastrophe that befell the Earth about 65 million years ago, when a large space boulder hit our planet. Clear signs of that catastrophe can be found in an iridium layer in the bedrock in many places on the Earth.
Fascinatingly, though, the BBC documentary claimed that no signs of other major meteorite impacts have been found in the bedrock of the Earth, even though our planet has experienced several other extinction events. The largest known extinction event, known as the [url=http://tinyurl.com/j2f46x7]Permian-Triassic extinction event[/url], which killed some 90-96% of all species of the Earth, including the highly successful [url=https://lh3.googleusercontent.com/xF3RfMnWUpiZ-p0oyHsEbHJQ_0_JkWLeMk3fBKVErzJmxqykD-G88fPYmGp3_grqCYJ6avU]trilobite[/url], may have been caused by an extremely violent and prolonged series of [url=http://tinyurl.com/jrllobx]volcanic eruptions[/url] on the Earth, specifically in what is now Siberia.
Volcanism may be worse on Venus than on the Earth, thereby possibly explaining not only the terrible atmosphere of Venus but also, perhaps, the cylindrical mountains.
Ann