here is that rock...(again)



... it looks like a shatter-cone in Dedham Pudding-stone

Floyd:
Xenolith means it may have rocks from other places embedded in it, so it's two (or more) birds with one stone (no pun intended); saves travel time nicely for Oppy.
That's the limit of my geology though....

I'd call it a breccia, though I can see the possibility of John's xenoliths. Tisdale also has a similar colors and texture, though not quite as decrepit, so it could be the same lithology.

"Xenolith" doesn't necessarily mean other places. Xenoliths are common in extrusive igneous rocks. Lava flowing up from underground can tear off and carry away chunks of rock from the walls of its conduits; these chunks of "country rock" don't melt before the lava solidifies. So you can have lava from some deep source incorporating chunks of rock from anywhere in the crust through which it flowed.

Still, I gotta say I read John's post and I was all, "what, you can say all that from one low-res JPEGgy color photo?"

The sundial of Oppy on sol 2688, 11h12 LT. The top of the gnomon makes me think of Titan

Getting closer to our target. Here's the latest navcam picture.


For me it resembles a Nimitz class' aircraft carrier. Should we call it USS Tisdale?

BTW, this last drive faulted again after 4m.
1F367000442EFFBMKSP1254L0M1.JPG
02690::p1254::02::2::0::0::2::0::4::front_haz_fault_pri15_4bpp

Back at Santa Maria (how long ago that seems now!) we saw a rock called "Terreros" which seems, to me, to have something of a look of Munro. I'm thinking of the bluish material that appears to be "splashed" over it (not saying it was splashed, that's just a visual reference, ok?)

One interesting thing... note what looks like two prominent round "holes" in the nearest end (more obvious in the 3D versions). There's more of about the same size visible elsewhere as well. My best guess is that these were once gas-filled vesicles which were exposed when the edge fragmented -- which I guess reinforces the idea that this is a chunk of basalt.

[EDIT: Incidentally, why doesn't the image included in the quote appear? Seems like in the past this worked nicely, but more recently the result is as above]

Nothing on the forum software has been changed.

I thought we didn't want the image to appear in the quote!

Phil

Well - quite. I certainly don't want to see it.

I think sometimes, when there is potential confusion as to which image is being referred to, it is beneficial to include the image in the quote. Generally we edit the quote to include only the relevant bits being referred to -- sometimes this would include an image. Last time I did this I went to the effort of saving a local copy of the image and re-uploading it with the post, but in this instance it wasn't that critical.

Oooooooooooo la la.

Some of the folks here are looking at the commonalities between Tisdale 2 and Bagua. (Can't remember where Bagua was...)

-m

Bagua was the big rock she swung by on sol 2551, just after leaving Santa Maria.

Guys, do you know what happened to the excellent site: marsgeo.com ? Has it just changed name or is it deleted?