These Land Anomalies, are probably seismic test holes for oil & gas development within the region. The reason they are aligned on perfect north and west alignments (and occassionally northwest southeast) is due to geophysics being more easily read by technicians who analyze what is underneath the earth to see where pockets of oil and natural gas are located in the Wyoming Thrustbelt. If you notice in surrounding areas of Wyoming, oil and gas roads dot the landscape.