The video that @Joel_Duff put out was is response to an article which appeared on the ICR site by Frank Sherwin who has an earned MS in zoology, titled Fossilized Reptile Skin Is Still Reptile Skin
There are degrees of wrong. Least wrong are scientifically competent YEC such as Todd Wood who may advance strained ideas that snap past the point of credibility, but they do understand the material. Most wrong are those who write on matters where they are clearly and embarrassingly clueless. Judge for yourself where this piece lies on the line.
Things do not get off to a promising start. A lead line is
Creation scientists predict that wherever skin is found in the fossil record, it would be 100% skin, unique and functional to that animal group.
Which raises the question, would biologists predict skin would not be skin? I would be safe in predicting that whenever green cheese is found on the moon, it would be green cheese.
He continues…
Recently, a tiny piece of amniote, or terrestrial vertebrate, epidermal skin was discovered in an infilled cave system at Richards Spur, Oklahoma.
and quotes from the source article published in Current Biology
This is the first record of a skin-cast fossil…from the Paleozoic Era and the earliest known occurrence of epidermal integumentary structures. We also report on several compression fossils (carbonized skin impressions), all demonstrating similar external morphologies to extant [living] crocodiles.
As you read along, it becomes apparent that Sherwin is not aware that the actual find is an fossil impression of skin - rare, finely detailed, textured, and of great scientific value - but 100% permineralized. It is right there in his source quote, “skin-cast fossil”.
And he continues
It was 100% skin even though it was dated to 286–289 millions of years ago.
And I am hoping he really mean 100% faithful impression of skin, but then he asks
Aside from the lack of evidence for the evolution of skin and scales, could this skin sample be preserved for these supposed millions of years?
Once permineralized, the fossil skin can be preserved until the Sun goes nova. So yup, he actually does not get this painfully basic point.
And he concludes with
Can the scientists be sure this infilled cave remained sealed and maintained an anoxic condition1 for all those alleged millions of years? If atmospheric air entered the cave system, the tissue would oxidize after several million years or less.
This amniote epidermal skin sample is 100% skin, unique and functional to amniotes that have been amniotes since the beginning of creation.
Of course, an anoxic environment only matters as long as it takes to fossilize, which takes some time but not millions of years. Once done, there would be no organic tissue to matter.
And further to my prior post, he is so fixated on what he thinks is some sort of preserved soft tissue that he is oblivious to the intractable difficulty that the entire fossilized cave system poses to the YEC timeline that he espouses.