The image shows a close-up of a rock surface. The rock appears to be made of a light-colored material, possibly sand or stone. The surface has a rough texture with small cracks and crevices. On the right side of the image, there is a black and white ruler with a grid-like pattern on it. The ruler is resting on the rock, and the ruler is slightly tilted to the left. The image is taken from a top-down perspective, looking down on the surface.