The Mariposa site on Turkey Creek on the Chaparrosa Ranch in eastern Zavala County is a good example of a streamside occupation zone, a general area or band along the creek where prehistoric groups established rancherias (temporary encampments) from time to time over several thousand years. From 1978 report by John L. Montgomery, The Mariposa Site: A Late Prehistoric Site on the Rio Grande Plain of Texas, Center for Archaeological Research, UTSA, Special Report 6.