A wealth of information is available here:
http://paleo.cc/paluxy.htm
This page deals primarily with the work of Roland Bird:
http://paleo.cc/paluxy/onheel.htm
Of course scientists have gone to great lengths to see what is under the Paluxy River, including damming a large portion of the riverbed and chiseling out large sections of tracks.
You aren't getting it. They aren't, and never have, gone under the harder to get to layers to see how far the trails go. They have always gone after the easy to extract tracks that can be sold without a large investment of time and money.
Your links say exactly what I'm saying.
It was "common descentists" who discovered tissue residuals in dinosaur fossils in the first place, and their studies are ongoing.
When someone makes an unconventional discovery in any endeavor, the reaction is bound to be controversy. However, in Schweitzer's case, the results have been vindicated by further scientific research. And Schweitzer is another one of those "common descentists" you refer to.
And not only is it common decentists that find dino soft tissue, but they found dino soft tissue decades ago. But the reason you didn't know that, and the reason study on the topic is so tepid now, is because they don't want any research that will damage their common decent narrative.
You are simply accepting the story given you without thinking. If a person claims cold fusion, it seems everyone drops what they are doing to investigate, or at least gets the best opinion they can on the subject with the acknowledgment and implied acceptance that their whole paradigm can shift. Dino soft tissue should be the same because the implications are the same in scale. But it isn't. That's because, like you, they are more interested in their religion of common decent than they are the truth.
No one is expanding on Schweitzer's work?
Ah, yes, you begin to have reading comprehension problems. Methinks you are realizing your belief is based on very little evidence and are switching to debate tactics instead of engaging in honest conversation. This is my nice way of urging you to realize I didn't say "no one is expanding on Schweitzer's work" and that you should read more carefully next time.