... and the couple of grinds they did near the contact between these rocks and the sulfate dominated ones above. I don't remember all their names. And I don't recall any data on-line. Have to go back through the slides. Anyone got anything on this?

It occurs to me that it'd be good to have a spread-sheet list with columns for the available data and rock calls and links.

Tipuna is one of my favorites. Great bedding! In other places nearby, if I recall, this same unit displayed the big cross-beds, so it's precurser is dune sand, but it has been altered (I believe). It needs to be placed in context to the upper unit, chemically speaking.

The thin joint coating at the lower right has not been discussed, either. It is at high angle to the bedding, is probably re-cemented, and may have be evidence for a ground-water conduit to feed the Sabkhaesque evaporative surface above. One of the wicks, if you will.

As for frost, check out this arm-waving.

TIPUNA: