Does this look like a meteor strike?

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Offline Arthur Geddes

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Does this look like a meteor strike?
« on: 20/04/2016 16:13:45 »
Southwest of southern tip of South America, the circular feature north of the islands; overrun a bit by that overriding plate.  Is that a really old crater?

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #1 on: 20/04/2016 18:54:50 »
Nuts!  Southeast of South America!  Sorry about that.

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #2 on: 21/04/2016 15:15:24 »
I dunno what might interest you all but; this sure has me interested.  Looks like it used to be on the east (yes, east) side of the southern tip of (Africa+South America) before the mid atlantic rift got going: don't know how though.  Anyhow; it looks like there's a slip deformation on the bottom bit &, i can't imagine what happened to the northern tip of the crater.

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Offline Ophiolite

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Re: Does this look like a meteor strike?
« Reply #3 on: 21/04/2016 17:10:07 »
Looks like an island arc to me, but I'm not clear of scale or precise location.
Observe; collate; conjecture; analyse; hypothesise; test; validate; theorise. Repeat until complete.

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #4 on: 21/04/2016 18:34:28 »
In the first photo there's a subduction arch to the lower right of the alleged crater; in the following two photos the subduction zone is cropped out.  The second photo is intended to give its location relative to southern South America.

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #5 on: 21/04/2016 18:35:43 »
The third photo outlines the alleged crater in red & some slip deformations in green.

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Offline Ophiolite

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Re: Does this look like a meteor strike?
« Reply #6 on: 22/04/2016 10:59:23 »
Thank you. I was looking at the wrong thing. I shall try to take a closer look at this over the weekend. My suspicion is that this is just coincidental curved features. But then many of the now well established astroblemes were explained away in a similar manner.
Observe; collate; conjecture; analyse; hypothesise; test; validate; theorise. Repeat until complete.

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Offline Bass

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Re: Does this look like a meteor strike?
« Reply #7 on: 27/04/2016 18:10:20 »
I'm always suspicious of circular geomorphologic features, especially in submarine areas.
Old enough to have a grandson
Slow enough to study rocks
Thirsty enough to find a pub

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #8 on: 27/04/2016 21:33:06 »
I'm seeing things all over the place; gotta reign it in. ...

What do you think of the Fiji Whirlpool?[attachment=21502]

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Offline Arthur Geddes

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Re: Does this look like a meteor strike?
« Reply #9 on: 27/04/2016 21:35:32 »
On the opposite side of the Earth is northern Africa:[attachment=21504]

I see faint ridges on the left & right; interesting..?

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Offline Storsiken

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Re: Does this look like a meteor strike?
« Reply #10 on: 12/06/2016 20:10:16 »
Thinking about going out to take a look at this but it's quite far out in the woods so I thought I'd ask around first. Could this circular shape indicate an old impact?

[attachment=21679]

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Offline JimBob

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Re: Does this look like a meteor strike?
« Reply #11 on: 30/06/2016 02:38:53 »
Let Bass have his way. The old coot could be WRONG! 

Too obviously a circle - what else could make it? Bass, I ask you.

Huh? Huh? Huh?  The crust being squeezes between two continents like tooth paste?
« Last Edit: 30/06/2016 03:02:27 by JimBob »
The mind is like a parachute. It works best when open.  -- A. Einstein

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Offline JimBob

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Re: Does this look like a meteor strike?
« Reply #12 on: 30/06/2016 03:04:35 »
What do you think of the Fiji Whirlpool?

Sorry no banana for a circle
The mind is like a parachute. It works best when open.  -- A. Einstein