For someone planning to attend the 2005 LPSC here are some questions to ask:

================================================
1.)Why hasn't THEMIS been used to characterize White Rock? A poster to
this LPSC will argue Mars Express imaging suggests it might be
evaporitic after all.

2.)Does the poster suggesting thin liquid water films currently in
Gusev imply that that may actually have been mud seen early in the
Spirit mission?

3.)Will Mars Express image the Malin/Edgett gullies in color?

cf.,
Newsgroups: sci.astro, alt.sci.planetary, sci.astro.amateur
From: rgregorycl...@yahoo.com (Robert Clark)
Date: 4 Dec 2003 12:13:36 -0800
Local: Thurs, Dec 4 2003 12:13 pm
Subject: Color image of Mars from Mars Express.
http://groups-beta.google.com/group/sci.astro.amateur/msg/ceaf790f6aa4b68c

4.)Do the seasonal changes seen by HEND for water content near the equator suggest there could be precipitation? Could this precipitation reach the ground as liquid during Summer?
================================================

Large Malin/Edgett gullies are resolvable in single filter images:

Nirgal Vallis (Released 27 March 2002)
http://themis.la.asu.edu/zoom-20020327a.html

But I haven't seen a multiband visible light image taken of the gullies - and that's after being in orbit for 4 years.

Anyone know of any?

Bob Clark