There doesn’t seem to be anything in the article that addresses the current estimates of the age of the Earth, or the methodology (uranium decay measurements) by which they are derived.
The article is tracing the history of the uniformitarian/old age movement (and the Church’s compromise with it), not the science. But don’t worry, I will be posting articles and papers demonstrating the powerful evidence for a young earth (and the flimsy evidence for an old earth) in fairly short order.