Exploring the Greenheugh Pediment, Sols 3387-3871, 16 Feb 2022-1 Jul 2023 |
Exploring the Greenheugh Pediment, Sols 3387-3871, 16 Feb 2022-1 Jul 2023 |
Feb 16 2022, 09:40 PM
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#901
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Solar System Cartographer Group: Members Posts: 10184 Joined: 5-April 05 From: Canada Member No.: 227 |
I am starting a new thread for the exploration of the Pediment - we should see a climb onto its surface very soon. It's a rough surface so progress may be slow.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jun 13 2023, 08:56 PM
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#902
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Junior Member Group: Members Posts: 27 Joined: 26-August 13 Member No.: 6994 |
Regarding Neville's image (sol 3851) in post 948, the rock with the big crack in it: What could cause this? The crack looks to have minimal erosion (or at least uniform erosion all along its boundaries), so I'd assume it's relatively fresh, but it can't have fractured from falling off a cliff face--it and all its neighbors must have been emplaced/exposed a loooong time ago, right? I'd naively expect wind erosion to affect the two pieces differently along the crack edges over the years/eons, but it looks like you could fit them together like they were broken apart yesterday.
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Jun 14 2023, 11:10 PM
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#903
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Senior Member Group: Members Posts: 1045 Joined: 17-February 09 Member No.: 4605 |
Regarding Neville's image (sol 3851) in post 948, the rock with the big crack in it: What could cause this? Just thermal expansion contraction and Mars provides a wide thermal range. Some minerals expand and contract more than others and overall thermal effects weaken the rock. Since we are used to a corrosive (oxygen) atmosphere and plentiful solvent (water) is is difficult to grasp the current sedate pace of erosion on Mars. |
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