this particular specimen went extinct 30,000 years ago
If you can believe some scientists timelines. Scientific analysis reveal the earth’s atmosphere hasn’t changed much in billions of yeas. That’s a serious problem for evolutionists who think it took billions of years just for our atmosphere to support life. But it makes perfect sense from a Biblical view of creation.
And while we are on the subject of diamonds, one of the the hardest minerals on earth that supposedly took millions of years to form. How did carbon get in them? Why is it still detectable when it decays in only thousands of years?
Scientists are consistently finding significant amounts of 14c everywhere it shouldn't be including the 2019 report in eLife on a Centrosaurus. In 2011 the journal PLoS One reported plenty of modern carbon in an allegedly 80-million year old mosasaur bone. The journal Radiocarbon has reported 14c in natural gas, coal, oil and other petroleum products.
Other careful studies report radiocarbon in limestone (from the Mesozoic layer), fossilized wood, coal, marble, deep groundwater, geological graphite, and in many dinosaur bones including the ten described below and the seven described in 2015 in the Radiocarbon in Dinosaur and Other Fossils paper by paleobiochemist Dr. Brian Thomas and his co-author Vance Nelson. And as reported at ScienceDirect, short-lived 14c is regularly found even in supposedly billion-year-old diamonds!