There are layers that are probably original ash falls. Especially those that are in the basalt "package". These white rocks appear to be just on the surface (no more than a few meters thick) and are small, local deposits. Eolean cross-beds are large and high-angle only if the sediment supply is large enough to create them and the ground water is high enough to preserve them.
The Opportunity rocks are pervasively altered / redeposited. Peace appears to also be deeply altered, in my opinion.
I should be clear: Wishstone has a crust, the Peace rock is deeply altered. I'll keep asserting until evidence proves otherwise that these are two entirely different kinds of rocks.
Plenty of flood basalts in non-marine settings...especially on Mars.
Do the basalts pre-date or post-date Gusev Crater? I think the former.
jms
Space/Science » in reply to I guessed on sulfates
re: I guessed on sulfates
The whole thread (41 posts)
- now there's an interesting rock
- Also, look at Peace Rock images
- jms - how are you with Hexagonal minerals?
- There's a psuedohexagonal mineral that came to mind,
- re: There's a psuedohexagonal mineral that came to mind,
- Aragonite?
- There's a psuedohexagonal mineral that came to mind,
- jms - how are you with Hexagonal minerals?
- re: now there's an interesting rock
- Is it credible that....
- What about this one.....?
- Also, look at Peace Rock images