Human prehistory and early history in the Choke Canyon region, as well as more generally throughout south Texas, are divided into four broad cultural-chronological divisions. Earliest known settlement was during the Paleoindian era from at least 13,500 years ago through about 10,000 years ago (11,500-8,000 B.C.). We did not find any buried Paleoindian sites, but scattered finds of distinctive lanceolate projectile points in upland areas, of types such as Folsom, Plainview, and Scottsbluff, show that early peoples knew the area. Most traces of their presence are either very deeply buried along the rivers or, were scoured out by floods and picked over by later peoples including the many modern artifact collectors over the last century.
Much more common at Choke Canyon were sites dating to the Archaic era, from 10,000 years ago to about a thousand years ago. Typical stone artifacts include dart points, knives, grinding stones, and gouges (adzes).
Dart points were used to tip short spears thrown with an atlatl or spear thrower, the main hunting weapon used during the entire Archaic period. Some dart points were also used knives. Metates (grinding slabs) and manos (hand grinders) were necessary for cracking and grinding up the many seeds, beans, and nuts collected by gatherers. Gouges are believed to have been woodworking tools used for cutting, scraping, and shaping wooden artifacts of many different kinds. But they were also the ancient equivalent of a Swiss army knife in today's world, multipurpose tools sometimes used to shape bone and antler, and scrape hides. Archaic people also made and used stone smoking pipes, usually just simple tubular ground stone affairs. True tobacco and jimsonweed are possible substances smoked in these pipes. The Archaic tool kit also contained chipped stone knives (thin bifaces) and hide scrapers (unifaces).
Antler and bone were used for flaking tools, awls, needles, and other implements. Ornaments and ritual objects were made from marine shell, mussel shell, bone, and antler ornaments. Archaic people would have had a very extensive array of baskets and other woven containers, but they had no clay pottery. Most of the things they used would have been made of perishable materials-plant fiber, wood, and leather: mats, carrying nets, rabbit nets, cord, sandals, clothing, and much more. None of these things are preserved in the archeological record of the area, but many have been found in the dry caves not far to the west and were mentioned by Spanish explorers.
The Late Prehistoric period, from about 1000 years ago until the Spanish arrived in the 16th century, is marked by the advent of the bow-and-arrow and the introduction of pottery. Arrows were tipped with a very small chipped stone points, often mistakenly called "bird points," even though they were used to bring down buffalo and sometimes people. Distinctive chipped stone knives, known as "beveled knives," are typical of the period. "Snub nosed" unifacial tools were used as hide scrapers. Earthenware pottery bowls and jars, most undecorated, were made and used by Late Prehistoric people. The pottery appeared mainly in "earth tones" of tan, brown, or reddish-orange, and was used haul and store water and food, for cooking and as serving dishes. Pottery vessels supplemented traditional containers made of wood, basketry, and gourds.
Other than adding bows-and-arrows and pottery, the Late Prehistoric people at Choke Canyon lived in much the same way as their Archaic forbears, as hunter-gatherers living off the natural bounty of the land. The common occurrence of arrow points, pottery, beveled knives, and unifacial stone hide scrapers with buffalo bones points to the importance of bison in the Late Prehistoric economy of Choke Canyon. This same pattern of buffalo exploitation, and attendant tool technology, is seen in many other areas of Texas at roughly the same time, beginning around A.D. 1200 or so. Yet at the Possum Hollow site, Choke Canyon's most thoroughly sampled Late Prehistoric site, excellent bone preservation showed that deer and antelope provided more meat than did bison.
We can safely assume that prehistoric people living in the Choke Canyon area had many other tools and items of clothing made out of wood, fiber, and animal skins and hides. The Lower Pecos region, where dry rock shelters have preserved such perishable artifacts, gives good insights into how the people of south Texas were likely equipped. The durable objects of stone, bone, and shell discussed above by no means represent all of the possessions that these people had to make their living as hunter-gatherers. Virtually all of the chipped stone tools mentioned above had handles or shafts made of wood. Archaic dart points were mounted on shafts and foreshafts of wood, and the atlatl was made of wood as well. Bows and arrow shafts were made of wood. Fire was made using a small "bow drill," and a wooden anvil. A whole array of baskets, mats, sandals, netting, and cordage were made out of plant fibers. Animal hides and furs were made into items of clothing, cloaks, and blankets. Due to the fact that most Choke Canyon and south Texas prehistoric sites were out in the open, these materials do not survive in the archeological record, and we can only speculate that they existed, based mainly on what we see in Lower Pecos sites not far to the northwest on the Rio Grande and Pecos.
Native American peoples were still living in the Choke Canyon area in the early Historic era, in the 16th through 18th centuries. Artifacts such as metal arrow points, iron knife blades, and colorful glass trade beads show that native people were in contact with the early European invaders, especially the Spanish. Prehistoric people in Texas had no metal artifacts and no knowledge of metallurgy, nor did they possess glass of any type (except a few traded pieces of obsidian, a natural volcanic glass). European-made goods show up in late aboriginal sites, evidence of direct, or indirect, contact. Native peoples quickly adapted to arrival of horses, and horse-related paraphernalia such as bits and bridle and saddle parts sometimes show up in aboriginal sites. But the arrival of Old World peoples also brought diseases, guns, and an overwhelming sea of changes for native peoples, as the newcomers made the region their own.
Beginning in 1977, and continuing for the next five years, teams of archeologists from the University of Texas at San Antonio (UTSA), Texas A&M, and Texas Tech investigated over 400 archeological sites distributed over 38,000 acres of land that would soon become the Choke Canyon Reservoir on the Frio River. The planning and construction was overseen by the United States Bureau of Reclamation. The Center for Archaeological Research at UTSA carried out most of the archeological research. Additional work was accomplished by two field schools during the summer of 1981. One was a six-week UTSA undergraduate field school, while the other was an intensive one-week field school attended by 271 members of the Texas Archeological Society. The major five-year period of investigation was preceded by an original archeological survey conducted by the Texas Historical Commission in the early 1970's and site recording done by several avocational archeologists.
A tremendous amount of archeology was done at Choke Canyon by the time a dam was completed on the Frio River and the lake began to fill up. Combined data would show that the Choke Canyon area of south Texas was occupied from PaleoIndian times on, but human activity was most heavily indicated during the long 9,000-year span of the Archaic.
Reviews of three of the most thoroughly investigated prehistoric sites at Choke Canyon help characterize the prehistoric archeology of the region and the lifeways of the area's hunter-gatherer inhabitants. Two of the sites—Possum Hollow (41LK201) and the Gates-Rowell Site (41LK31/32)— are now underwater at the main body (east end) of Choke Canyon Reservoir. The other site— Skillet Mountain No. 4 (41MC222)—is at the west end of the lake, not far from Tilden, Texas. Possum Hollow and Gates-Rowell were eventually both largely destroyed as earthen fill for the Choke Canyon Dam was mined from borrow areas encompassing the sites. Skillet Mountain No. 4 was a thin site not used for long and it had been damaged as well as revealed by land-clearing while the UTSA archeologists were working nearby.