Gary wrote:
Please see the following:
http://mars3.jpl.nasa.gov:80/mgs/msss/camera/images/7_17_98_gusev_rel/index.htm

[snip]

Alex writes:
I am indeed familiar with the 1998 image of Gusev Crater/Ma'adim Vallis, as I am of Malin and Edgett's failure to find evidence in the MOC NA imagery of ancient shorelines at Parker's Contact 2 at the meter scale. That said, it's hard to say what eroded, billion year old shorelines would look like in any event. Many Mars scientists that I know feel that the MOC NA is too narrowly focused at local scales and may miss broader, regional gradations that could show up in more synoptic imagery, as well as in the long wavelength structure depicted by MOLA. One will note the Viking orbital imagery gave regional coverage, which is what much of the analysis of Gusev by Cabrol et al. is based on. For example, see:

Limnologic Analysis of Gusev Crater Paleolake, Mars
Edmond A. Grin, Nathalie A. Cabrol
Icarus, Vol. 130, No. 2, Dec 1997, pp. 461-474 (doi: 10.1006/icar.1997.5817)
Abstract http://www.idealibrary.com/links/doi/10.1006/icar.1997.5817

Ma'adim Vallis Revisited through New Topographic Data: Evidence for an Ancient Intravalley Lake
Nathalie A. Cabrol, Edmond A. Grin, Gilles Dawidowicz
Icarus, Vol. 123, No. 2, Oct 1996, pp. 269-283 (doi: 10.1006/icar.1996.0157)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.1996.0157

Distribution, Classification, and Ages of Martian Impact Crater Lakes
Nathalie A. Cabrol, Edmond A. Grin
Icarus, Vol. 142, No. 1, Nov 1999, pp. 160-172 (doi: 10.1006/icar.1999.6191)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.1999.6191

The Evolution of Lacustrine Environments on Mars: Is Mars Only Hydrologically Dormant?
Nathalie A. Cabrol, Edmond A. Grin
Icarus, Vol. 149, No. 2, Feb 2001, pp. 291-328 (doi: 10.1006/icar.2000.6530)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.2000.6530

Ma'adim Vallis Evolution: Geometry and Models of Discharge Rate
Nathalie A. Cabrol, Edmond A. Grin, Ragnhild Landheim
Icarus, Vol. 132, No. 2, Apr 1998, pp. 362-377 (doi: 10.1006/icar.1998.5903)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.1998.5903

Possible Frost Mounds in an Ancient Martian Lake Bed
Nathalie A. Cabrol, Edmond A. Grin, Wayne H. Pollard
Icarus, Vol. 145, No. 1, May 2000, pp. 91-107 (doi: 10.1006/icar.1999.6326)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.1999.6326

Duration of the Ma'adim Vallis/Gusev Crater Hydrogeologic System, Mars
N. A. Cabrol, E. A. Grin, R. Landheim, R. O. Kuzmin, R. Greeley
Icarus, Vol. 133, No. 1, May 1998, pp. 98-108 (doi: 10.1006/icar.1998.5914)
Abstract
http://www.idealibrary.com/links/doi/10.1006/icar.1998.5914

Alex R. Blackwell\
University of Hawaii