Not surprising a basic google search turned this extensive explanation written precisely to the ignorant folks that get mislead by Young Earth Creationists constant effort to pervert actual science.
https://letterstocreationists.wordpr...r-soft-tissue/
Since the non-scientists that continue to espouse these ridiculous arguments on these threads will get lost in the actual science discussed in this article, I will highlight a simplified summary.
"I cited a couple of these young earth articles at the beginning of this article. Googling “dinosaur soft tissue age earth” produced thousands of results. Dozens and dozens of these hits are sites promoting young earth creationism, claiming that Schweitzer’s results disprove evolution and radioactive dating of rocks. Some of these sites misrepresent the facts, stating that actual red blood cells have been found. As noted above, that is not the case: these little round red things are chunks of iron oxide, like rust, which just happen to be about the size and shape of red blood cells. The actual organic remains are highly crosslinked remnants of a several proteins which are known to have stable structures. These remnants retain the shape of the original soft tissue, which is not surprising, since they were confined within tiny pores in the dinosaur bones.
The main attack by young earth creationists on the antiquity of these finds is an argument from incredulity, based on ignorance: “It is obviously impossible for any trace of soft tissue to endure for
70 million years.” But,
how do they know that it is impossible? They don’t. Yes, experiments on protein degradation in test tubes indicate that proteins would break down completely within about a million years. But lots of examples show that the rate of protein degradation varies wildly, depending on the conditions, so no one can say with certainty how long some fragments of protein can last, preserved with iron and sealed in mineral pores.
We simply don’t know how this process progresses over a span of millions of years. It is difficult to devise definitive experiments to mimic that timespan."