Exploring Mt Sharp north of the dunes - Part 1: Beyond Pahrump Hills, Site 45-50, Sol 923-1147, March 12-October 28, 2015 |
Exploring Mt Sharp north of the dunes - Part 1: Beyond Pahrump Hills, Site 45-50, Sol 923-1147, March 12-October 28, 2015 |
Mar 12 2015, 08:38 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Finally drove away from Pahrump Hills on sol 923. Wheel tracks sure are piling up at the end of the drive -- there seems to have been quite a bit of slip.
[admin note: I was going to start a new thread for this, but realized our thread naming may be a bit out of whack because we're really not journeying to Mt Sharp anymore, are we? We'll discuss it with admins and I'll move/rename posts when we figure out our naming schema.] -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Mar 18 2015, 10:05 PM
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Member Group: Members Posts: 153 Joined: 8-February 04 From: Phoenix, AZ USA Member No.: 9 |
The shape, orientation, and geometry of these fractures reminds me of terrestrial examples of seal failures due to hydrofracturing via overpressure. This is also supported by the observations that they occur in a rather thick massive to laminated mudstone interval and terminate in the overlying more permeable coarser-grained strata.
For the interested, this a nice accessible review article on the subject: Effects of mechanical layering on hydrofracture emplacement and fluid transport in reservoirs For those less curious, here is a link to a nice photo from the article of the phenomena: Hydrofractured Mercia Mudstone For those in the UK, the classic exposures at Kilve and Watchet in Somerset are worth a pilgrimage to see these phenomena in incredible beach cliff and wave-cut terrace exposures. Check a tide chart, if you do though! -------------------- Tim Demko
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