Paleogene period
Very close to the current geological map as modern day isn't it? This time period lasted 42 million years (65 million to 23 million years ago) also forming the oceans we now call today the Pacific, Atlantic, later the Artic, Southern, and the Indian oceans. At the beginning of the period it was a hot and humid climate in the beginning but after the Paleocene-Eocene Thermal Maximum, which was a global climate change making it hotter, and than along with the Antarctic Circumpolar Current which cooled down the oceans, and as we entered into the Neogene period the climate became cooler. The land masses of the time period are just as they are now: North America, South America, Antartica, Australia, Asia, Europe and Africa, although they are not in their place, like Europe is with North America and India is not yet with Asia, as well as Australia just coming off of Antarctica.