AHa. . . . perfect backround for flint artifacts......Your find is just the tippy tip of the history ice berg. . . . .>
The ancient history of Texas residents is a basket of spaghetti that takes time and research to unravel...it's not as simple as some books portray.. Different people came and went with the variables weather patterns created. There are over 200 different projectile points listed just for Texas, each was a " Clan " that was showing it's individuality...each needs to be under the microscope not just lumped into a huge group as" Apaches or Commanches etc "
Not enough research work for you ? Texas is very much an important part of who colonized North America before the Clovis family ?
No telling the age of your find without being documented with artifacts at a similar strata...Axes, Choppers,& scrapers are well documented from the very earliest Paleo excavations right though to the American civil war era.
The top pic might be a Guadalupe bi-face, (which is a scrapper type tool) although it's hard to tell if it has a triangular cross section shape. The others could be choppers/scrappers or they could be "blanks" from which the final point would've been made of.