Researchers report that a proxy-based reconstruction of sea surface temperatures in the Oligocene, 33.9-23.0 million years ago, combined with climate modeling suggests a warm global climate in the ...

Thirty-four-million years ago, Earth changed profoundly. What happened, and how were Earth's animals, plants, oceans, and climate affected? Focusing on the end of the Eocene epoch and the Eocene ...

The researchers were particularly interested in these microfossils because they came from the Oligocene epoch, a time in Earth’s history known for falling temperatures.

These records reveal orbital-scale Asian monsoon variability in the high-CO 2, warm-climate world of the Late Oligocene, 20 Myr before Northern Hemisphere glaciation.

The greenhouse-to-icehouse transition across the Eocene–Oligocene (E–O) boundary (33.7 Myr) was a critical shift in Cenozoic climate marked by declining atmospheric CO 2 (ref. 1), long-term ...

About 34 million years ago, Earth's climate cooled and an ice sheet formed on Antarctica as atmospheric carbon dioxide (CO₂) fell below ~750 parts per million (ppm). Sedimentary cycles from a drill ...

Kenneth G. Miller, Miriam E. Katz, Oligocene to Miocene Benthic Foraminiferal and Abyssal Circulation Changes in the North Atlantic, Micropaleontology, Vol. 33, No. 2 (1987), pp. 97-149. ... has ...

The Eocene-Oligocene climate crisis virtually wiped out Asian anthropoids, so the only place where they could evolve to become later monkeys, apes and humans was Africa", ...