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Cape York - Shoemaker Ridge and the NE traverse, Starting sol 2735
Bill Harris
post Nov 18 2011, 11:26 AM
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QUOTE (CR)
But, I am not sure it is deeply weathered.
Agreed. Putting the original thought in context, a terrestrial geologist in eastern Alabama/western Georgia (the igneous/metamorphic province) would saunter up to an outcrop and say this-- the granite/schist would be soft, crumbly and saprolytic and you would have to dig a bit to get a "fresh" sample. But in our Martian context, yes, "deeply altered" is more appropriate. I fully expect to find examples of the pre-Endeavour impact land surface on this traverse.

QUOTE (Tesh)
Note to everyone: check that blog; it has a lot of "goodies".
Quality. I like the title of the blog, it reflects the OliverTwistian feeling I have looking at all this over the Internet. It's a good read.


EDIT: I like the comment "The engineering team accepted the risk after several long, fruitful, and constructive conversations.* " and the ensuing footnote. BT,DT.



One question-- Matt's blog entry seems to imply that the Homestake vein is more tubular in nature. My mental image of that class of structure on CY is that it is more tabular in nature, like a filled fracture. I am more of a soft-rock type than hard-rock so I'll beg clarification (from anyone).

--Bill


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centsworth_II
post Nov 18 2011, 01:50 PM
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QUOTE (Bill Harris @ Nov 18 2011, 06:26 AM) *
...Matt's blog entry seems to imply that the Homestake vein is more tubular in nature...
Do you base this on his comment, "...exposed rocks resembling blood veins in shape...."?
Perhaps he was referring to a similarity in two dimensions, not three.
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Bill Harris
post Nov 18 2011, 03:49 PM
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Based on that description the implication is tubular, and I've heard other comments that suggest that. My experience is more "tabular".

Just tryin' to get edified... smile.gif

--Bill



EDIT-- uploadeded a HiRISE image (ESP_024015_1775) of the "winterhaven" area of Cape York. This image has been enhanced to bring out small details and fine contrasts so it's not as smooth-looking as some versions.
Attached thumbnail(s)
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eoincampbell
post Nov 18 2011, 05:02 PM
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Matt also describes Homestake as being "..about 1cm in diameter.." blink.gif
(did the whole of the section that was driven-over become visible?)


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Matt Lenda
post Nov 18 2011, 11:54 PM
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QUOTE (Bill Harris @ Nov 18 2011, 03:26 AM) *
One question-- Matt's blog entry seems to imply that the Homestake vein is more tubular in nature. My mental image of that class of structure on CY is that it is more tabular in nature, like a filled fracture. I am more of a soft-rock type than hard-rock so I'll beg clarification (from anyone).

--Bill

Well...
QUOTE (eoincampbell @ Nov 18 2011, 09:02 AM) *
Matt also describes Homestake as being "..about 1cm in diameter.." blink.gif
(did the whole of the section that was driven-over become visible?)


Ah, poo! I knew my using "diameter" would bite me. Literally a minute before I popped over here, I was publishing comments and re-reading the entry when I noticed that. (I often delegate proof-reading until after publishing. My habits are impeccably silly.)

So, no, I don't mean to imply that it's tubular. It's definitely more of a filled fracture. Less round-y, more corner-y.

-m
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Bill Harris
post Nov 19 2011, 01:07 AM
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Ah, so I heard what you said and understood what you meant... smile.gif

Sometimes, as a geologist, one can get a bit pedantic with empty precision in terminology. wink.gif

You were correct-- those Turkey Haven and North Haven pics are tremendous.

--Bill


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CosmicRocker
post Nov 19 2011, 05:15 AM
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QUOTE (Tesheiner @ Nov 18 2011, 01:49 AM) *
... Note to everyone: check that blog; it has a lot of "goodies".

Many thanks for your insightful blog, Matt. smile.gif


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PDP8E
post Nov 19 2011, 05:29 AM
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Hey Matt... thanks for the blog with the crazy good inside info!


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Stu
post Nov 19 2011, 02:18 PM
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"Turkey Haven" looking south... I think... I'm a little lost after not really paying attention the past couple of days... laugh.gif


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Tesheiner
post Nov 19 2011, 02:42 PM
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QUOTE (Stu @ Nov 19 2011, 03:18 PM) *
"Turkey Haven" looking south... I think...


Exactly. Here's a polar view put together with a GE image.
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Ant103
post Nov 19 2011, 03:05 PM
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Sol 2778 navcam (pré-drive) :


And Sol 2779 color pan of the ridge. Lovely colors there smile.gif.


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Matt Lenda
post Nov 19 2011, 04:37 PM
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QUOTE (Stu @ Nov 19 2011, 06:18 AM) *
"Turkey Haven" looking south... I think... I'm a little lost after not really paying attention the past couple of days... laugh.gif


Attached Image

I think this is right. Turkey Haven seems to be referenced as the one right under our nose; we'll be IDD'ing this boss through the Thanksgiving weekend.

"Winter Haven" might be another name floating around, which is ~15m NE of Oppy right now. It has even greater northerly slopes than Turkey Haven, which is at about 15 degrees as is!

I don't know if "Winter Haven" is the winter haven, but it certainly is a candidate. Since it doesn't an an official associated target in our tactical database (for now), I would guess that it was just the name the science team chose on a whim. That seemed to be the way of things at the SOWG meeting for 2778/9...

Interesting how I'm knee-deep with the team and I don't know these things! tongue.gif

-m
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Stu
post Nov 19 2011, 05:15 PM
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Some new interviewy goodness on my blog, if anyone would like a look...

http://roadtoendeavour.wordpress.com/2011/...ask-the-experts


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ElkGroveDan
post Nov 19 2011, 05:22 PM
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QUOTE (Stu @ Nov 19 2011, 06:18 AM) *
"Turkey Haven" looking south...

Here we are at long last! Almost at the summit of the peak we've NOT been gazing up at all these long months.


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Phil Stooke
post Nov 19 2011, 06:28 PM
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The summit of the peak we've been gazing down on? (when we could see it at all)

Phil


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