The Devonian period

: null All seven Devonian stages have been defined by GSSPs, but revisions of the base of the Emsian and of the Devonian–Carboniferous boundary are currently underway. Most of the Devonian Period was a time of exceptionally high sea-level stand and inferred widespread equable climates, but glaciations occurred immediately before its end in the south polar areas of Gondwana (South America, Central and South Africa). There is even evidence for...