[X] My Assistant

[nprev]

I hope that this is posted in the correct area; if not, please move it to the most appropriate location.

I am struck by the fact that the layers in rocks at both Gusev & Meridiani are astonishingly regular in thickness. This is even more remarkable given the fact that the Home Plate deposits are thought to be volcanic instead of sedimentary (in a hydrological sense); yet the regularity persists.

Can anyone account for this perception? I realize that many non-mutually-dependent processes may be at work here, but overall it is striking that nearly all layered rocks to date have apparently almost equal layer thickness distributions (within a given example), and this periodicity is puzzling. Perhaps we are finally seeing evidence of highly regular climatic cycles al la Mikhailovitch?

This may well be my personal observational bias at work; still, sure would appreciate a reality check!