Thanks for the comments - Shankar and Aditya.
@Shankar: these are patterns seen on the rock. Nice idea of having one color and the other one B&W, will try out for sure.
@Aditya: There was a chance to go closer and look for patterns, but i did not do that. These patterns looked like layers in brain and i associated the dead grass as the memories
As i associated this with brain, i chose to go with diptych.