Complex sentence: The Kekeamuan age is a period of geologic time (33.9--28.4 Ma) within the Early Oligocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages.
Split into simpler sentences: The Kekeamuan age is a period of geologic time (33.9--28.4 Ma) within the Early Oligocene Epoch of the Paleogene Period. It is used more specifically with Asian Land Mammal Ages.