The Prehistorical Patrol: The Oligocene II

Poul Anderson, Time Patrol (New York, 2006); The Shield Of Time (New York, 1991).

The Time Patrol Academy in the Oligocene American West existed from about 31,725,389 BC until about 31,225,389 BC;

Manson Everard and Charles Whitcomb attended the Academy in about 31,724,389 BC;

Wanda Tamberly and Tu Sequeira attended in exactly 31,275,389 BC;

the Oligocene epoch was followed by the Miocene, then the Pliocene, epochs;

a small Patrol base existed for about a hundred years in southern Iberia during the transition from the Miocene to the Pliocene.

I need to learn a minimum about these two later epochs before locating other prehistorical Time Patrol bases.