This site had several different things of interest to offer. There was a single metate, a few rock rings, and what may be grid lines for sectioning off an area for planting. The straight-line rows of rocks are from 8’ to 15’ long with occasional perpendicular rows.
When researching the possibility that our site might be Garden / Planting Grids, we came across this website: Prehistoric Agriculture: Grid and Waffle Gardens of the US Southwest - By Tom Baker
We did not find the complete grids described on his website, but the construction of what we found did find match his description as follows: “Often the lines on the ground are formed by stones that prehistoric farmers apparently gathered and used to outline or surround their rectangular growing plots or gardens. …as some of our photos illustrate, the lines can also be curved, sometimes almost into circles, apparently done when necessary to conform to the lay of the land. It is noteworthy that prehistoric gardens often appear in sandy plots, possibly because sand holds moisture well, and although straight alignments were obviously preferred, the stone or adobe lines will sometimes curve or curl around the edges of a sand formation or dune. This is a type of agriculture called "dry farming" because it did not employ irrigation from constantly flowing streams or rivers, which are rare in the deserts of the Southwest. Instead, the prehistoric Indians depended on rainwater for their crops, which in this arid country is relatively scarce and had to be collected and hoarded assiduously”. Using Tom Baker's ideas could explain some of the sites that we have found.