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Main
Date: 02 Dec 2006 05:41:11
From:
Subject: Earth May Still Have Mars Beat
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Reading a fascinating book about the history of mapping the Martian
surface, one of the things I encountered was a map illustrating how the
Grand Canyon on Earth would almost fit into one of the side branches of
the Valles Marineris.
This time, however, a thought occurred to me.
A web search enabled me to find that the Grand Canyon is 277 miles
long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
about 2,500 miles) long.
But it was mentioned in the book that the Mariner Valley looked as
though the planet's crust had cracked. Many of the side valleys in that
system do look as though they were worn by running water, the same as
the Grand Canyon. But if one thinks of a valley formed by tectonic
rather than erosive processes...
what about the Rift Valley of Africa? That one happens to be, as I
found out, about 3,000 miles long.
As it happens, though, the Rift Valley is not quite as dramatic as the
Grand Canyon, and in parts of its length - such as where it crosses the
Red Sea to get from Lebanon, Israel, and Jordan to Ethiopia - it is
effaced completely. Still, it's sort of nice to know that Mars isn't
the only place to go for a *really big* valley in the Solar System.
John Savard
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Date: 02 Dec 2006 08:08:50
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
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jsavard@ecn.ab.ca wrote:
> Reading a fascinating book about the history of mapping the Martian
> surface, one of the things I encountered was a map illustrating how the
> Grand Canyon on Earth would almost fit into one of the side branches of
> the Valles Marineris.
>
> This time, however, a thought occurred to me.
>
> A web search enabled me to find that the Grand Canyon is 277 miles
> long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
> about 2,500 miles) long.
>
> But it was mentioned in the book that the Mariner Valley looked as
> though the planet's crust had cracked. Many of the side valleys in that
> system do look as though they were worn by running water, the same as
> the Grand Canyon. But if one thinks of a valley formed by tectonic
> rather than erosive processes...
>
> what about the Rift Valley of Africa? That one happens to be, as I
> found out, about 3,000 miles long.
The coast of Africa seems to match South America. Perhaps the Atlantic
Ocean is such a valley.
>
> As it happens, though, the Rift Valley is not quite as dramatic as the
> Grand Canyon, and in parts of its length - such as where it crosses the
> Red Sea to get from Lebanon, Israel, and Jordan to Ethiopia - it is
> effaced completely. Still, it's sort of nice to know that Mars isn't
> the only place to go for a *really big* valley in the Solar System.
>
> John Savard
>
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Date: 02 Dec 2006 15:15:29
From: Rand Simberg
Subject: Re: Earth May Still Have Mars Beat
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On Sat, 02 Dec 2006 08:08:50 -0700, in a place far, far away, Hop
David <hopd@cunews.info > made the phosphor on my monitor glow in such
a way as to indicate that:
>> But it was mentioned in the book that the Mariner Valley looked as
>> though the planet's crust had cracked. Many of the side valleys in that
>> system do look as though they were worn by running water, the same as
>> the Grand Canyon. But if one thinks of a valley formed by tectonic
>> rather than erosive processes...
>>
>> what about the Rift Valley of Africa? That one happens to be, as I
>> found out, about 3,000 miles long.
>
>The coast of Africa seems to match South America. Perhaps the Atlantic
>Ocean is such a valley.
It would certainly be considered one if it weren't for all that pesky
water.
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Date: 02 Dec 2006 09:26:13
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
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Rand Simberg wrote:
> On Sat, 02 Dec 2006 08:08:50 -0700, in a place far, far away, Hop
> David <hopd@cunews.info> made the phosphor on my monitor glow in such
> a way as to indicate that:
>
>
>>>But it was mentioned in the book that the Mariner Valley looked as
>>>though the planet's crust had cracked. Many of the side valleys in that
>>>system do look as though they were worn by running water, the same as
>>>the Grand Canyon. But if one thinks of a valley formed by tectonic
>>>rather than erosive processes...
>>>
>>>what about the Rift Valley of Africa? That one happens to be, as I
>>>found out, about 3,000 miles long.
>>
>>The coast of Africa seems to match South America. Perhaps the Atlantic
>>Ocean is such a valley.
>
>
> It would certainly be considered one if it weren't for all that pesky
> water.
So the Mariana Trench isn't a valley?
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Date: 02 Dec 2006 16:34:52
From: Rand Simberg
Subject: Re: Earth May Still Have Mars Beat
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On Sat, 02 Dec 2006 09:26:13 -0700, in a place far, far away, Hop
David <hopd@cunews.info > made the phosphor on my monitor glow in such
a way as to indicate that:
>>>>what about the Rift Valley of Africa? That one happens to be, as I
>>>>found out, about 3,000 miles long.
>>>
>>>The coast of Africa seems to match South America. Perhaps the Atlantic
>>>Ocean is such a valley.
>>
>>
>> It would certainly be considered one if it weren't for all that pesky
>> water.
>
>So the Mariana Trench isn't a valley?
I don't know how geographers classify these things. I'd think it
certainly would be if it weren't at the bottom of an ocean. Maybe it
is anyway, but they don't call it the Mariana Valley, they call it the
Mariana Trench.
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Date: 02 Dec 2006 09:57:48
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
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Rand Simberg wrote:
> On Sat, 02 Dec 2006 09:26:13 -0700, in a place far, far away, Hop
> David <hopd@cunews.info> made the phosphor on my monitor glow in such
> a way as to indicate that:
>
>
>>>>>what about the Rift Valley of Africa? That one happens to be, as I
>>>>>found out, about 3,000 miles long.
>>>>
>>>>The coast of Africa seems to match South America. Perhaps the Atlantic
>>>>Ocean is such a valley.
>>>
>>>
>>>It would certainly be considered one if it weren't for all that pesky
>>>water.
>>
>>So the Mariana Trench isn't a valley?
>
>
> I don't know how geographers classify these things. I'd think it
> certainly would be if it weren't at the bottom of an ocean. Maybe it
> is anyway, but they don't call it the Mariana Valley, they call it the
> Mariana Trench.
"The Mariana Trench is an arc-shaped valley..."
http://encarta.msn.com/encyclopedia_761579348/Mariana_Trench.html
Encyclopedia Brittanica describes Nero Deep as a valley.
Casual Googling can find numerous examples of geologists using the word
valley for sub oceanic valleys.
So I'd say your criteria is all wet.
Hop
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Date: 02 Dec 2006 18:28:28
From: Rand Simberg
Subject: Re: Earth May Still Have Mars Beat
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On Sat, 02 Dec 2006 09:57:48 -0700, in a place far, far away, Hop
David <hopd@cunews.info > made the phosphor on my monitor glow in such
a way as to indicate that:
>>>>>The coast of Africa seems to match South America. Perhaps the Atlantic
>>>>>Ocean is such a valley.
>>>>
>>>>
>>>>It would certainly be considered one if it weren't for all that pesky
>>>>water.
>>>
>>>So the Mariana Trench isn't a valley?
>>
>>
>> I don't know how geographers classify these things. I'd think it
>> certainly would be if it weren't at the bottom of an ocean. Maybe it
>> is anyway, but they don't call it the Mariana Valley, they call it the
>> Mariana Trench.
>
>"The Mariana Trench is an arc-shaped valley..."
>http://encarta.msn.com/encyclopedia_761579348/Mariana_Trench.html
>
>Encyclopedia Brittanica describes Nero Deep as a valley.
>
>Casual Googling can find numerous examples of geologists using the word
>valley for sub oceanic valleys.
As I said, I didn't know.
>So I'd say your criteria is all wet.
Well, it certainly is in a literal sense.
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Date: 02 Dec 2006 19:02:59
From: Fred J. McCall
Subject: Re: Earth May Still Have Mars Beat
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Hop David <hopd@cunews.info > wrote:
:jsavard@ecn.ab.ca wrote:
:
: > Reading a fascinating book about the history of mapping the Martian
: > surface, one of the things I encountered was a map illustrating how the
: > Grand Canyon on Earth would almost fit into one of the side branches of
: > the Valles Marineris.
: >
: > This time, however, a thought occurred to me.
: >
: > A web search enabled me to find that the Grand Canyon is 277 miles
: > long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
: > about 2,500 miles) long.
: >
: > But it was mentioned in the book that the Mariner Valley looked as
: > though the planet's crust had cracked. Many of the side valleys in that
: > system do look as though they were worn by running water, the same as
: > the Grand Canyon. But if one thinks of a valley formed by tectonic
: > rather than erosive processes...
: >
: > what about the Rift Valley of Africa? That one happens to be, as I
: > found out, about 3,000 miles long.
:
:The coast of Africa seems to match South America. Perhaps the Atlantic
:Ocean is such a valley.
Continental drift. It's not quite the same thing as a long, straight
tectonic valley, is it?
--
"The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore,
all progress depends on the unreasonable man."
--George Bernard Shaw
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Date: 02 Dec 2006 13:05:00
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
|
Fred J. McCall wrote:
> Hop David <hopd@cunews.info> wrote:
>
> :jsavard@ecn.ab.ca wrote:
> :
> :> Reading a fascinating book about the history of mapping the Martian
> :> surface, one of the things I encountered was a map illustrating how the
> :> Grand Canyon on Earth would almost fit into one of the side branches of
> :> the Valles Marineris.
> :>
> :> This time, however, a thought occurred to me.
> :>
> :> A web search enabled me to find that the Grand Canyon is 277 miles
> :> long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
> :> about 2,500 miles) long.
> :>
> :> But it was mentioned in the book that the Mariner Valley looked as
> :> though the planet's crust had cracked. Many of the side valleys in that
> :> system do look as though they were worn by running water, the same as
> :> the Grand Canyon. But if one thinks of a valley formed by tectonic
> :> rather than erosive processes...
> :>
> :> what about the Rift Valley of Africa? That one happens to be, as I
> :> found out, about 3,000 miles long.
> :
> :The coast of Africa seems to match South America. Perhaps the Atlantic
> :Ocean is such a valley.
>
> Continental drift. It's not quite the same thing as a long, straight
Straight? Where did I say "straight"?
> tectonic valley, is it?
>
I had thought continental drift was caused by plate tectonics. If so,
the gap between continents could be thought of as a long valley created
by plate tectonics.
Hop
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Date: 03 Dec 2006 02:46:00
From: Fred J. McCall
Subject: Re: Earth May Still Have Mars Beat
|
Hop David <hopd@cunews.info > wrote:
:Fred J. McCall wrote:
:
: > Hop David <hopd@cunews.info> wrote:
: >
: > :jsavard@ecn.ab.ca wrote:
: > :
: > :> Reading a fascinating book about the history of mapping the Martian
: > :> surface, one of the things I encountered was a map illustrating how the
: > :> Grand Canyon on Earth would almost fit into one of the side branches of
: > :> the Valles Marineris.
: > :>
: > :> This time, however, a thought occurred to me.
: > :>
: > :> A web search enabled me to find that the Grand Canyon is 277 miles
: > :> long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
: > :> about 2,500 miles) long.
: > :>
: > :> But it was mentioned in the book that the Mariner Valley looked as
: > :> though the planet's crust had cracked. Many of the side valleys in that
: > :> system do look as though they were worn by running water, the same as
: > :> the Grand Canyon. But if one thinks of a valley formed by tectonic
: > :> rather than erosive processes...
: > :>
: > :> what about the Rift Valley of Africa? That one happens to be, as I
: > :> found out, about 3,000 miles long.
: > :
: > :The coast of Africa seems to match South America. Perhaps the Atlantic
: > :Ocean is such a valley.
: >
: > Continental drift. It's not quite the same thing as a long, straight
:
:Straight? Where did I say "straight"?
Where did I say you said straight? Pull your little head out of your
little vendetta, Hop.
: > tectonic valley, is it?
: >
:
:I had thought continental drift was caused by plate tectonics. If so,
:the gap between continents could be thought of as a long valley created
:by plate tectonics.
Yes, which says that unless PLATE tectonics is the mechanism on Mars,
you're trying to compare apples and aardvarks.
--
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn
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Date: 02 Dec 2006 22:23:50
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
|
Fred J. McCall wrote:
> Hop David <hopd@cunews.info> wrote:
>
> :Fred J. McCall wrote:
> :
> :> Hop David <hopd@cunews.info> wrote:
> :>
> :> :jsavard@ecn.ab.ca wrote:
> :> :
> :> :> Reading a fascinating book about the history of mapping the Martian
> :> :> surface, one of the things I encountered was a map illustrating how the
> :> :> Grand Canyon on Earth would almost fit into one of the side branches of
> :> :> the Valles Marineris.
> :> :>
> :> :> This time, however, a thought occurred to me.
> :> :>
> :> :> A web search enabled me to find that the Grand Canyon is 277 miles
> :> :> long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
> :> :> about 2,500 miles) long.
> :> :>
> :> :> But it was mentioned in the book that the Mariner Valley looked as
> :> :> though the planet's crust had cracked. Many of the side valleys in that
> :> :> system do look as though they were worn by running water, the same as
> :> :> the Grand Canyon. But if one thinks of a valley formed by tectonic
> :> :> rather than erosive processes...
> :> :>
> :> :> what about the Rift Valley of Africa? That one happens to be, as I
> :> :> found out, about 3,000 miles long.
> :> :
> :> :The coast of Africa seems to match South America. Perhaps the Atlantic
> :> :Ocean is such a valley.
> :>
> :> Continental drift. It's not quite the same thing as a long, straight
> :
> :Straight? Where did I say "straight"?
>
> Where did I say you said straight? Pull your little head out of your
> little vendetta, Hop.
Why make an observation that's not relevant to what I said?
You might as well say it's not quite the same as a tectonic rift full of
gibbering baboons.
>
> :> tectonic valley, is it?
> :>
> :
> :I had thought continental drift was caused by plate tectonics. If so,
> :the gap between continents could be thought of as a long valley created
> :by plate tectonics.
>
> Yes, which says that unless PLATE tectonics is the mechanism on Mars,
> you're trying to compare apples and aardvarks.
And I wasn't comparing Martian valleys to earth valleys. Savaard
mentioned valleys caused by tectonic processes. And I mentioned that the
Atlantic Ocean might be thought of as such a valley.
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Date: 03 Dec 2006 07:08:16
From: Fred J. McCall
Subject: Re: Earth May Still Have Mars Beat
|
Hop David <hopd@cunews.info > wrote:
:Fred J. McCall wrote:
:
: > Hop David <hopd@cunews.info> wrote:
: >
: > :Fred J. McCall wrote:
: > :
: > :> Hop David <hopd@cunews.info> wrote:
: > :>
: > :> :jsavard@ecn.ab.ca wrote:
: > :> :
: > :> :> Reading a fascinating book about the history of mapping the Martian
: > :> :> surface, one of the things I encountered was a map illustrating how the
: > :> :> Grand Canyon on Earth would almost fit into one of the side branches of
: > :> :> the Valles Marineris.
: > :> :>
: > :> :> This time, however, a thought occurred to me.
: > :> :>
: > :> :> A web search enabled me to find that the Grand Canyon is 277 miles
: > :> :> long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
: > :> :> about 2,500 miles) long.
: > :> :>
: > :> :> But it was mentioned in the book that the Mariner Valley looked as
: > :> :> though the planet's crust had cracked. Many of the side valleys in that
: > :> :> system do look as though they were worn by running water, the same as
: > :> :> the Grand Canyon. But if one thinks of a valley formed by tectonic
: > :> :> rather than erosive processes...
: > :> :>
: > :> :> what about the Rift Valley of Africa? That one happens to be, as I
: > :> :> found out, about 3,000 miles long.
: > :> :
: > :> :The coast of Africa seems to match South America. Perhaps the Atlantic
: > :> :Ocean is such a valley.
: > :>
: > :> Continental drift. It's not quite the same thing as a long, straight
: > :
: > :Straight? Where did I say "straight"?
: >
: > Where did I say you said straight? Pull your little head out of your
: > little vendetta, Hop.
:
:Why make an observation that's not relevant to what I said?
Because, unlike your apparently obsession with me, you don't control
my side of the connection. I don't just respond to you, Hop, despite
your practices running the other way.
:You might as well say it's not quite the same as a tectonic rift full of
:gibbering baboons.
Only if the one on Mars is a tectonic rift full of gibbering baboons
and that would therefore make them the same.
: > :> tectonic valley, is it?
: > :>
: > :
: > :I had thought continental drift was caused by plate tectonics. If so,
: > :the gap between continents could be thought of as a long valley created
: > :by plate tectonics.
: >
: > Yes, which says that unless PLATE tectonics is the mechanism on Mars,
: > you're trying to compare apples and aardvarks.
:
:And I wasn't comparing Martian valleys to earth valleys. Savaard
:mentioned valleys caused by tectonic processes. And I mentioned that the
:Atlantic Ocean might be thought of as such a valley.
There are tectonic processes and then there are tectonic processes,
Hop. They're not all created the same.
--
"Some people get lost in thought because it's such unfamiliar
territory."
--G. Behn
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Date: 02 Dec 2006 23:56:20
From: Jonathan
Subject: Re: Earth May Still Have Mars Beat
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"Fred J. McCall" <fmccall@earthlink.net > wrote in message
news:9ge4n25k8sebmjjmlppbbrvtfo2fmml1pl@4ax.com...
> Hop David <hopd@cunews.info> wrote:
>
>
> :> tectonic valley, is it?
> :>
> :
> :I had thought continental drift was caused by plate tectonics. If so,
> :the gap between continents could be thought of as a long valley created
> :by plate tectonics.
I think continental drift is caused by sea floor spreading.
Recent observations show plate tectonics might have
been present in the past according to this article.
Plate Tectonics on Mars?
http://science.nasa.gov/newhome/headlines/ast29apr99_1.htm
>
> Yes, which says that unless PLATE tectonics is the mechanism on Mars,
> you're trying to compare apples and aardvarks.
There may not be much plate movement on Mars, but there's been
quite a bit of faulting. Particularly interesting is the Tharsis uplift.
On a planet with a radius of 3400 km....
"The up-warp of Tharsis is over 4000 km wide and the vertical
deformation exceeds 6 km"
http://www.lukew.com/marsgeo/tectonic.html
>
> --
> "Some people get lost in thought because it's such unfamiliar
> territory."
> --G. Behn
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Date: 02 Dec 2006 13:58:46
From: Eugene Griessel
Subject: Re: Earth May Still Have Mars Beat
|
jsavard@ecn.ab.ca wrote:
>Reading a fascinating book about the history of mapping the Martian
>surface, one of the things I encountered was a map illustrating how the
>Grand Canyon on Earth would almost fit into one of the side branches of
>the Valles Marineris.
>
>This time, however, a thought occurred to me.
>
>A web search enabled me to find that the Grand Canyon is 277 miles
>long, and the Mariner Valley on Mars is abour 4,000 kilometers (or
>about 2,500 miles) long.
>
>But it was mentioned in the book that the Mariner Valley looked as
>though the planet's crust had cracked. Many of the side valleys in that
>system do look as though they were worn by running water, the same as
>the Grand Canyon. But if one thinks of a valley formed by tectonic
>rather than erosive processes...
>
>what about the Rift Valley of Africa? That one happens to be, as I
>found out, about 3,000 miles long.
>
>As it happens, though, the Rift Valley is not quite as dramatic as the
>Grand Canyon, and in parts of its length - such as where it crosses the
>Red Sea to get from Lebanon, Israel, and Jordan to Ethiopia - it is
>effaced completely. Still, it's sort of nice to know that Mars isn't
>the only place to go for a *really big* valley in the Solar System.
There's also the rift in the mid-Atlantic ridge. Although you need a
submersible to see it!
Eugene L Griessel
What's the use of having power if you don't plan to abuse it?
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Date: 03 Dec 2006 00:00:29
From: Jordan
Subject: Re: Earth May Still Have Mars Beat
|
Hop David wrote:
> The coast of Africa seems to match South America. Perhaps the Atlantic
> Ocean is such a valley.
The Atlantic Ocean is what you get after rifting has progressed for a
few tens of millions of years. Earth, unlike Mars, has active crustal
plate movements.
- Jordan
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Date: 03 Dec 2006 14:47:19
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
|
Jordan wrote:
> Hop David wrote:
>
>>The coast of Africa seems to match South America. Perhaps the Atlantic
>>Ocean is such a valley.
>
>
> The Atlantic Ocean is what you get after rifting has progressed for a
> few tens of millions of years. Earth, unlike Mars, has active crustal
> plate movements.
>
> - Jordan
>
Savaard was comparing spectacular valleys of Mars to spectacular valleys
of earth. The usual comparison is between the Grand Canyon and Valles
Marineris. Then Savaard noted that Valles Marineris may not have been
formed wholly from erosion.
So it'd be fair to use earth valleys formed from processes other than
erosion. Savaard then volunteered the Rift Valley of Africa.
Well, the Atlantic Ocean is a rift created by a process other than
erosion. It is quite large and spectacular. It easily beats Valles
Marineris in length and width. It's deepest at the Puerto Rico trench:
8.6 kilometers. Which is just a little deeper than Valles Marineris (7
kilometers).
But Olympus Mons still dwarfs Mount Everest.
Hop
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Date: 03 Dec 2006 22:14:17
From: Rand Simberg
Subject: Re: Earth May Still Have Mars Beat
|
On Sun, 03 Dec 2006 14:47:19 -0700, in a place far, far away, Hop
David <hopd@cunews.info > made the phosphor on my monitor glow in such
a way as to indicate that:
>Well, the Atlantic Ocean is a rift created by a process other than
>erosion. It is quite large and spectacular. It easily beats Valles
>Marineris in length and width. It's deepest at the Puerto Rico trench:
>8.6 kilometers. Which is just a little deeper than Valles Marineris (7
>kilometers).
>
>But Olympus Mons still dwarfs Mount Everest.
Following your rule of ignoring the water, so does Mauna Loa, though
not by as much. It's more impressive though, in a sense, because it's
not part of a range (unless you consider the other islands).
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Date: 03 Dec 2006 16:01:07
From: Hop David
Subject: Re: Earth May Still Have Mars Beat
|
Rand Simberg wrote:
> On Sun, 03 Dec 2006 14:47:19 -0700, in a place far, far away, Hop
> David <hopd@cunews.info> made the phosphor on my monitor glow in such
> a way as to indicate that:
>
>
>>Well, the Atlantic Ocean is a rift created by a process other than
>>erosion. It is quite large and spectacular. It easily beats Valles
>>Marineris in length and width. It's deepest at the Puerto Rico trench:
>>8.6 kilometers. Which is just a little deeper than Valles Marineris (7
>>kilometers).
>>
>>But Olympus Mons still dwarfs Mount Everest.
>
>
> Following your rule of ignoring the water, so does Mauna Loa, though
> not by as much. It's more impressive though, in a sense, because it's
> not part of a range (unless you consider the other islands).
(Googling...) Wow! The top is 17 kilometers above it's base according to
http://hvo.wr.usgs.gov/maunaloa/
Almost double Mt. Everest.
Hop
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Date: 03 Dec 2006 14:41:16
From: Alex Terrell
Subject: Re: Earth May Still Have Mars Beat
|
Hop David wrote:
> Jordan wrote:
>
> > Hop David wrote:
> >
> >>The coast of Africa seems to match South America. Perhaps the Atlantic
> >>Ocean is such a valley.
> >
> >
> > The Atlantic Ocean is what you get after rifting has progressed for a
> > few tens of millions of years. Earth, unlike Mars, has active crustal
> > plate movements.
> >
> > - Jordan
> >
>
> Savaard was comparing spectacular valleys of Mars to spectacular valleys
> of earth. The usual comparison is between the Grand Canyon and Valles
> Marineris. Then Savaard noted that Valles Marineris may not have been
> formed wholly from erosion.
>
> So it'd be fair to use earth valleys formed from processes other than
> erosion. Savaard then volunteered the Rift Valley of Africa.
>
> Well, the Atlantic Ocean is a rift created by a process other than
> erosion. It is quite large and spectacular. It easily beats Valles
> Marineris in length and width. It's deepest at the Puerto Rico trench:
> 8.6 kilometers. Which is just a little deeper than Valles Marineris (7
> kilometers).
>
> But Olympus Mons still dwarfs Mount Everest.
>
Climbing Manua Loa involves a greater increase in Gravitational
Potential Energy.
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Date: 03 Dec 2006 22:53:36
From: Rand Simberg
Subject: Re: Earth May Still Have Mars Beat
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On 3 Dec 2006 14:41:16 -0800, in a place far, far away, "Alex Terrell"
<alexterrell@yahoo.com > made the phosphor on my monitor glow in such a
way as to indicate that:
>> But Olympus Mons still dwarfs Mount Everest.
>>
>Climbing Manua Loa involves a greater increase in Gravitational
>Potential Energy.
That's yet a different criterion.
I used Mauna Loa as an example of a mountain that is higher than
Everest, if you count from the (underwater) base. I didn't even
consider gravitational potential (and am not sure that I should).
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Date: 05 Dec 2006 06:36:49
From: Christopher P. Winter
Subject: Re: Earth May Still Have Mars Beat
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On 2 Dec 2006 05:41:11 -0800, jsavard@ecn.ab.ca wrote (in part):
>Reading a fascinating book about the history of mapping the Martian
>surface,
I'm guessing that's /Mapping Mars/, by Oliver Morton. Excellent book! I
like his illustration of the size of Olympus Mons: If commercial airliners
could fly through solid rock, the entire trip from San Francisco to Los
Angeles could take place within the bulk of that gigantic mountain.
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