Rock Structure

FIG. 1 is a top perspective view of a rock structure in a use configuration with environment, according to our new design;

FIG. 2 is a side perspective view thereof in a use configuration with environment;

FIG. 3 is another side perspective view thereof; and,

FIG. 4 is a top view thereof.

The dot-dash broken lines in FIG. 1 depict the boundary of the environment that forms no part of the claimed design.

The dashed broken lines in FIGS. 1 and 2 show an example environment and form no part of the claimed design.