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Geological aftereffects of an asteroid impact on a large mountain range?
Which moon is most favourable as a refuelling station?How high/large can a mountain range get?What is the climate of a mountain range at the border of the polar front?What's the width of the average mountain?How would a large arctic mountain range affect the weather?How could a mountain range naturally form in a roughly clean, complete shape?Medieval town built on the desert side of a mountain range?Is an offset mountain range plausible?What would be used for “coordinates” on a large asteroid?High-Altitude Asteroid ImpactGeological Explanation for an Unusually Temperate Northern Mountain Valley
$begingroup$
For the sake of analogy, let's take the Chixclub impactor and move it a mountain range akin to the modern Himalayas. Obviously we're dealing with an extinction level event here so I'm not concerned with the effects on life, and only loosely interested in the atmospheric effects. My primary concern is with the effects of the impact on the surrounding geology.
I'm mostly looking for information on how the area would look a few thousand years out - would the nature of the area better preserve a crater? Or would the ejecta fill the hollow and leave a sort of semi-flat (but still high altitude) plateau?
Feel free to ignore this, as I don't want to overburden the question, but does the result change if the impactor is at a lower speed (e.g. an orbiting body forced to deorbit)?
edit: per the clarification request below, here is a link to a spot on Earth most analogous to the environment I am imagining. A fairly wide stretch of a range of high peaks of marble and schist (et al) fairly well removed from an ocean. The impact's 'epicenter' would be surrounded by mountains on all sides.
Well, pre-impact. 'After the impact' is part of the answer I'm seeking.
geology asteroids mountains
asked May 26 at 17:53
ngonStrafengonStrafe
868
$endgroup$
add a comment |
$begingroup$
For the sake of analogy, let's take the Chixclub impactor and move it a mountain range akin to the modern Himalayas. Obviously we're dealing with an extinction level event here so I'm not concerned with the effects on life, and only loosely interested in the atmospheric effects. My primary concern is with the effects of the impact on the surrounding geology.
I'm mostly looking for information on how the area would look a few thousand years out - would the nature of the area better preserve a crater? Or would the ejecta fill the hollow and leave a sort of semi-flat (but still high altitude) plateau?
Feel free to ignore this, as I don't want to overburden the question, but does the result change if the impactor is at a lower speed (e.g. an orbiting body forced to deorbit)?
edit: per the clarification request below, here is a link to a spot on Earth most analogous to the environment I am imagining. A fairly wide stretch of a range of high peaks of marble and schist (et al) fairly well removed from an ocean. The impact's 'epicenter' would be surrounded by mountains on all sides.
Well, pre-impact. 'After the impact' is part of the answer I'm seeking.
geology asteroids mountains
asked May 26 at 17:53
ngonStrafengonStrafe
868
$endgroup$
1
$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14
add a comment |
$begingroup$
For the sake of analogy, let's take the Chixclub impactor and move it a mountain range akin to the modern Himalayas. Obviously we're dealing with an extinction level event here so I'm not concerned with the effects on life, and only loosely interested in the atmospheric effects. My primary concern is with the effects of the impact on the surrounding geology.
I'm mostly looking for information on how the area would look a few thousand years out - would the nature of the area better preserve a crater? Or would the ejecta fill the hollow and leave a sort of semi-flat (but still high altitude) plateau?
Feel free to ignore this, as I don't want to overburden the question, but does the result change if the impactor is at a lower speed (e.g. an orbiting body forced to deorbit)?
edit: per the clarification request below, here is a link to a spot on Earth most analogous to the environment I am imagining. A fairly wide stretch of a range of high peaks of marble and schist (et al) fairly well removed from an ocean. The impact's 'epicenter' would be surrounded by mountains on all sides.
Well, pre-impact. 'After the impact' is part of the answer I'm seeking.
geology asteroids mountains
asked May 26 at 17:53
ngonStrafengonStrafe
868
$endgroup$
For the sake of analogy, let's take the Chixclub impactor and move it a mountain range akin to the modern Himalayas. Obviously we're dealing with an extinction level event here so I'm not concerned with the effects on life, and only loosely interested in the atmospheric effects. My primary concern is with the effects of the impact on the surrounding geology.
I'm mostly looking for information on how the area would look a few thousand years out - would the nature of the area better preserve a crater? Or would the ejecta fill the hollow and leave a sort of semi-flat (but still high altitude) plateau?
Feel free to ignore this, as I don't want to overburden the question, but does the result change if the impactor is at a lower speed (e.g. an orbiting body forced to deorbit)?
edit: per the clarification request below, here is a link to a spot on Earth most analogous to the environment I am imagining. A fairly wide stretch of a range of high peaks of marble and schist (et al) fairly well removed from an ocean. The impact's 'epicenter' would be surrounded by mountains on all sides.
Well, pre-impact. 'After the impact' is part of the answer I'm seeking.
geology asteroids mountains
geology asteroids mountains
asked May 26 at 17:53
ngonStrafengonStrafe
868
asked May 26 at 17:53
ngonStrafengonStrafe
868
edited May 26 at 19:06
ngonStrafe
asked May 26 at 17:53
ngonStrafengonStrafe
868
asked May 26 at 17:53
ngonStrafengonStrafe
868
asked May 26 at 17:53
ngonStrafengonStrafe
868
868
1
$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14
add a comment |
1
$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14
1
1
$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
The crust in that region is about 80 km thick, and there is no ocean around to fill the hole immediately after the impact. This means there would be no exposed magma interacting with water to cause additional explosions.
After the impact there would be some rivers slowly pouring into the crater, filling it with water and sediments over the passing of millennia.
Until the basin was filled by sediments you would have a fairly circular lake, surrounded by a ridge of mountains.
After a fair amount of time the movement of the Indian subcontinent against the Eurasian plate would probably distort the circular shape and the depth profile of the crater, but it would take more than some millennia.
edited May 27 at 8:42
Grollo
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
$endgroup$
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
add a comment |
Your Answer
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
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active
oldest
votes
$begingroup$
The crust in that region is about 80 km thick, and there is no ocean around to fill the hole immediately after the impact. This means there would be no exposed magma interacting with water to cause additional explosions.
After the impact there would be some rivers slowly pouring into the crater, filling it with water and sediments over the passing of millennia.
Until the basin was filled by sediments you would have a fairly circular lake, surrounded by a ridge of mountains.
After a fair amount of time the movement of the Indian subcontinent against the Eurasian plate would probably distort the circular shape and the depth profile of the crater, but it would take more than some millennia.
edited May 27 at 8:42
Grollo
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
$endgroup$
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
add a comment |
$begingroup$
The crust in that region is about 80 km thick, and there is no ocean around to fill the hole immediately after the impact. This means there would be no exposed magma interacting with water to cause additional explosions.
After the impact there would be some rivers slowly pouring into the crater, filling it with water and sediments over the passing of millennia.
Until the basin was filled by sediments you would have a fairly circular lake, surrounded by a ridge of mountains.
After a fair amount of time the movement of the Indian subcontinent against the Eurasian plate would probably distort the circular shape and the depth profile of the crater, but it would take more than some millennia.
edited May 27 at 8:42
Grollo
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
$endgroup$
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
add a comment |
$begingroup$
The crust in that region is about 80 km thick, and there is no ocean around to fill the hole immediately after the impact. This means there would be no exposed magma interacting with water to cause additional explosions.
After the impact there would be some rivers slowly pouring into the crater, filling it with water and sediments over the passing of millennia.
Until the basin was filled by sediments you would have a fairly circular lake, surrounded by a ridge of mountains.
After a fair amount of time the movement of the Indian subcontinent against the Eurasian plate would probably distort the circular shape and the depth profile of the crater, but it would take more than some millennia.
edited May 27 at 8:42
Grollo
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
$endgroup$
The crust in that region is about 80 km thick, and there is no ocean around to fill the hole immediately after the impact. This means there would be no exposed magma interacting with water to cause additional explosions.
After the impact there would be some rivers slowly pouring into the crater, filling it with water and sediments over the passing of millennia.
Until the basin was filled by sediments you would have a fairly circular lake, surrounded by a ridge of mountains.
After a fair amount of time the movement of the Indian subcontinent against the Eurasian plate would probably distort the circular shape and the depth profile of the crater, but it would take more than some millennia.
edited May 27 at 8:42
Grollo
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
edited May 27 at 8:42
Grollo
1,9221720
edited May 27 at 8:42
Grollo
1,9221720
edited May 27 at 8:42
Grollo
1,9221720
1,9221720
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
answered May 26 at 19:30
L.Dutch♦L.Dutch
98.7k31233477
98.7k31233477
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
add a comment |
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
3
3
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
$begingroup$
+1 for this answer. It covers all the salient points bar one. High mountain ranges experience far more erosion compared to flat ground near sea level, so there's a lot of sediment being created and transported. A crater in a mountain range is likely to fill up reasonably rapidly (thousands to tens of thousands of years).
$endgroup$
– Arkenstein XII
May 26 at 20:21
1
1
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
$begingroup$
Crater diameter is about 15 times impactor diameter at least at sizes up to 1 km diameter. Depth is about 1/4 diameter or about 4 times impactor diameter. So a 10 km object will create a 40 km deep crater. This is deep enough that plastic flow will be significant, and the rock hot enough to make steam.
$endgroup$
– Sherwood Botsford
May 26 at 20:22
add a comment |
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$begingroup$
Welcome to the site ngonStrafe, when you have a few minutes, please take the tour and read up in our help center about how we work: How to Ask. Others may post comments to help refine the question, good first post though. +1
$endgroup$
– Don Qualm
May 26 at 17:58
$begingroup$
Help us out by giving us a longitude and latitude linked to Google maps showing the exact mountain range you'd like us to use as an example. I ask for this because a generic list is difficult and potentially unproductive, while explaining what would happen to that exact range (the composition and situation for which would be well known) would allow us to go into detail that I believe would be more helpful to you.
$endgroup$
– JBH
May 26 at 18:33
$begingroup$
Thanks for the link! +1 And that's a great spot. Deep ravine surrounded by mountains. High altitude, few trees, probably tons of basalt. I'm hoping Arkenstein XII shows up. This sounds like his kind of question!
$endgroup$
– JBH
May 26 at 19:14