Campanian
The Campanian is, in the ICS' geologic timescale, the fifth of six ages of the Late Cretaceous epoch (or, in chronostratigraphy: the fifth of six stages in the Upper Cretaceous series). The Campanian spans the time from 83.6 ± 0.7 Ma to 72.1 ± 0.6 Ma (million years ago). It is preceded by the Santonian and it is followed by the Maastrichtian.
Classical Latin
In Cruttwell's introduction, the Golden Age is dated 80 BC – 14 AD ("from Cicero to Ovid"), which is about the same as Teuffel's. Of this "Second Period" Cruttwell says that it "represents the highest excellence in prose and poetry," paraphrasing Teuffel. The Ciceronian Age is now "the Republican Period" and is dated 80–42 BC through the Battle of Philippi. Later in the book Cruttwell omits Teuffel's first half of the Ciceronian and starts the Golden Age at Cicero's consulship of 63 BC, an error perpetuated into Cruttwell's second edition as well. He must mean 80 BC as he includes Varro in Golden Latin. Teuffel's Augustan Age is Cruttwell's Augustan Epoch, 42 BC – 14 AD.