OK, I don't know if you know that you are basically in Cretaceous limestone which is 60-120 million (roughly) years old. This is broken down into various parts. You also have some really old Paleozoic rocks north of you that may wash down your creek or river. I don't know. Some of the stuff in your pics is fossilized coral, urchins, pieces of broken pottery, a small ammonite and possibly a couple of native american artifacts.You can look most of that up on google-Cretaceous fossils or Glen Rose fossils.I would need to see and examine all of this stuff to id it all. Like I said before, keep searching(there are treasure stories from your area) and watch out for snakes. And you may want to buy a Texas fossil book which I would give you, but I gave away my library when I retired. Your other option is to marry a HISTORICAL geologist. Keep posting though, but maybe 1-2 pics at a time.