Here is a link to those weird tracks...

http://www.travelexplorations.com/the-cart...8840-18555.html

Irrigation source

Tracks?..are they sure that's what they are? They almost look like "troths" or "gutters" that are used to direct water flow. Just beacuse they are close together and "look" like cart tracks dosen't necessarily mean that what they are....just a thought.

It was a very interesting story...

Yeah I'm with Onyxdk in this one, it could also have been that a little river/stream used to go down those tracks, and everybody here knows how water can-----insert word here that i don't remember----- rocks.
( darn i can't remember the word I need to put there...hmm you know how water can polish rocks, etc?)

^The word is 'erode'.

AH YES! thanks!!

well, I cant imagine they would be very useful unless every cart was the same with... but who knows...