what are these tracks ?

[buickanddeere]

 

[aczlan]

I see a picture of a map (topo map?)...

Aaron Z

 

[dave1949]

Erosion control contours?

 

[byronlj]

worms

 

[Egon]

Winter Sidewinders.

 

[Damifino]

Area 51

 

[Fossil Farm]

Either contour farming or WASCOBS (water and sediment control basins) to control erosion on cropland. Hard to tell exactly from that distance. Or somebody just messin' with you.

 

[groundcover]

R4's slipping on snow !

 

[lockhaven]

just shadows from contour farming see how much wider the dark is along the river because of the trees

 

[buickanddeere]

Those were photos taken by a buddy from the cockpit window of a 767 over New Mexico.