quaternäre

Quaternære refers to the fourth geological epoch, succeeding the Neogene and marking the most recent period in Earth's history. It began approximately 2.58 million years ago and continues to the present day. This epoch is characterized by significant climatic fluctuations, most notably a series of glacial and interglacial periods, often collectively referred to as the ice ages. These climatic shifts profoundly impacted global ecosystems, leading to significant changes in flora and fauna distribution and the evolution of new species.

The Quaternary is further divided into two periods: the Pleistocene and the Holocene. The Pleistocene, spanning from 2.58 million to about 11,700 years ago, is defined by the expansion and contraction of ice sheets across large parts of the Northern Hemisphere. During this time, megafauna such as mammoths, saber-toothed cats, and giant ground sloths roamed the Earth. The Holocene, the current interglacial period, began around 11,700 years ago and is characterized by warmer and more stable climatic conditions. This stability has allowed for the development of human civilization, agriculture, and significant alterations to the planet's landscapes. The study of the Quaternary is crucial for understanding climate change, biodiversity evolution, and the geological processes that continue to shape our planet.