ASBOG Practice Exam

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What is the correct sequence of the Quaternary epochs from oldest to youngest?

Pleistocene; Holocene
Holocene; Pleistocene
Oligocene; Pleistocene
Pleistocene; Miocene

The correct answer is: Pleistocene; Holocene

The Quaternary period is divided into two main epochs: the Pleistocene and the Holocene. The Pleistocene, which began approximately 2.6 million years ago, is characterized by repeated glaciations and significant shifts in climate, shaping the landscape and influencing the evolution of many species, including humans. The Holocene follows the Pleistocene and began roughly 11,700 years ago, marking a period of warmer climate and the development of human civilizations. The sequence of these epochs from oldest to youngest is, therefore, Pleistocene followed by Holocene. Recognizing that the Pleistocene is the older epoch and set the stage for the Holocene's relatively stable climate is essential for understanding the chronology of geological history during the Quaternary period.