Mount Sharp Extended mission 1a

The main thread seems to be taking a day or more before posts appear.

This is just a trial to see if a new thread will refresh more quickly.

Below is a repeat of the image that shows what might be veins growing on Curi's deck in a relatively thick matrix of dust.

Mauree / John radogno and others please post something here to test if posting here is more efficient.



Yes, the ampersand trick does not seem to work any more on the previous version of this thread.


Just to catch up on where we were on the previous tread I am re-posting the last pictures. The first has some ground surface features that may not be the same as the similarly colored, but deep, veins that are very close by. These surface features look very similar to the the unusual features that have recently appeared on the Curi deck.

This next picture is of the water droplets (as determined by (NASA) on the Phoenix Lander that lasted for a few Sols:

We know that liquid water activity can happen on, near, and under the surface of Mars. We need to know more about the conditions that allow it to happen.


I've speculated here on BU as well as in my book "On Debris flows and veins" that veins are examples of current happenings on Mars surface. If the objects on Curi's deck are solid and are composed of white minerals and are not traces of tracks left on the dust on the deck by sporadic movement of rocks then it might be some direct evidence for that speculation.


Just made an animated gif of the area on the instrument deck contrasting the sol 765 position with the sol 1375 position.

I don't know what is happening here.
The sol 765 image shows that the streaks on the deck are most likely due to the movement of small pebbles on the dark dust covered deck as many of the streaks end in raised small pebbles.

The sol 1375 streaks are confusing in that they do not seem to end in pebbles and that they appear to be solid instead of mere pathways showing the deck surface cleared by moving pebbles.

The probability is however greater that they are indeed streaks caused by random pebble movement since the earlier streaks have been almost completely obliterated and replaced by the new, apparently more substantial ones, that we now see.



This gif should have been posted above;


Wonder what is the explanation for this outcrop?


Nice one, Winston. This may be an example of inverted relief, where a former streamlet cemented its bed and caused it to become more resistant to erosion, while the ground around it was partially stripped away.

This is interesting. In the new NASA release about Curiosity finding tridymite in some of the mudstones, it was emphasized that it is commonly associated with silicic volcanism on Earth.

But I don't think there are any of those types of volcanoes on Mars? So I asked Jonathan Clarke the geologist, and he mentioned that it can also form from "diagenesis of biogenic opal in soils and shallowly buried sediments, also from groundwater or volcanic glass in weathering profiles. Always in association with another silica polymorph cristabolite (forming opal-CT)."

The paper itself mentions that tridymite, cristobalite, opal-CT and Opal-A were all found in the Buckskin mudstone.

And I also found this:


I remember Wikipedia or somewhere else stating that tridymite can also be synthesized and be used in building furnace, kiln, and incinerator, etc.

John et al

Could we agree to post new relevant discussions on Mt. sharp extended mission to this thread. The old thread still takes extremely long to show, over 12 hours sometimes.



MSL released a series of closeup MAHLI images of the pale area first found by Paul Scott Anderson. I posted an Xeyed 3D of the main area of interest in those images to my new Tumblr blog

The image is below


Beautiful 3D.

Here are some other examples of several yellow depressions that I think is the same thing. The yellow deposit in the top right may also have some parallel lines but the picture is not clear enough to be sure:

John Radongo

The depressions you showed above may indeed be very similar to the one we have been discussing.

today I came across a sol 1405 image of a large hole in this same rock that looked like it had a debris flow in it emanating from the side of large hole itself.

I've posted it on the Tumblr site also.

Posts still seem to be taking very long to appear on MRB.



Wow, did anyone see these three MAHLI pictures from Sol 1416?
Brushed free from sand, quite a few (undeniable?) fossils appear!
Looks exactly like a slab of unpolished marble.


Here's an enhanced version of one of your images above.

Could you indicate which ones of the objects look like fossils?


Reply 17 photo shows blood vessel remnants:

Winston: I finally got the time to make a cut out, showing what I think resembles fossilized organic matter of some sort:

I mean the the three oblong objects aligned diagonally from the lower left corner, up towards the upper right corner.
As you can see, each is made up of "sections" or "compartments" which here and there are broken into, showing them to be hollow. Whether animal or plant related - who knows? But to my eyes definitely not mineral/geologic.
As Faceless points out via his link in reply 18, the thin spiraling white threadlike object at the center top, can not be mineral in origin. And it's also not a filled in crack, due to its form.