climatic optimum
31List of climate change topics — This is a list of climate change topics.AlphanumericTOC align=center nobreak= references= top=|0 9100,000 year problem AAbrupt climate change Albedo Antarctica cooling controversy Antarctic Cold Reversal Antarctic oscillation Anthropogenic… …
32Eastern savannas of the United States — The eastern savannas of the United States covered large portions of the east side of the continent until the early 20th century. These were in a fire ecology of open grassland and forests with low ground cover of herbs and grasses.The frequent… …
33Piora Oscillation — The Piora Oscillation was an abrupt cold and wet period in the climate history of the Holocene Epoch; it is generally dated to the period of c. 3200 to 2900 BCE. [ [http://www.news about space.org/story/2409.html Space and Earth Science News… …
34Eocene — System Series Stage Age (Ma) Neogene Miocene Aquitanian younger Paleogene Oligocene …
35Ordos Desert — The region of Ordos. The Ordos Desert (simplified Chinese: 鄂尔多斯 …
36Middle Miocene disruption — The term Middle Miocene disruption, alternatively the Middle Miocene extinction or Middle Miocene extinction peak, refers to a wave of extinctions of terrestrial and aquatic life forms that occurred around the middle of the Miocene Epoch, c. 14.8 …
37Okeechobean Sea — Table displaying the Okeechobean Sea and its relation to geologic time and North American Land Mammal Ages. Dry periods or marine regressive periods are tan in color. The Okeechobean Sea was a Cenozoic eutropical subsea, which along with the… …
38Solar variation — Solar variations are changes in the amount of solar radiation emitted by the Sun. There are periodic components to these variations, the principal one being the 11 year solar cycle (or sunspot cycle), as well as aperiodic fluctuations. Solar… …
39Temperature record — For extreme records instead of records as a set of data, see Temperature extremes For instrument derived temperature records, see Instrumental temperature record …
40Stone Age — the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods. [1860 65] * * * First known period of… …
