The Pre-Pastonian Stage or Baventian Stage (from
Easton Bavents
Easton Bavents is a hamlet and former civil parish in the East Suffolk district of the county of Suffolk, England. It now belongs to the civil parish of Reydon. Once an important village with a market, it has been much eroded by the North Sea. ...
in
Suffolk
Suffolk () is a ceremonial county of England in East Anglia. It borders Norfolk to the north, Cambridgeshire to the west and Essex to the south; the North Sea lies to the east. The county town is Ipswich; other important towns include ...
), is the name for an early
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
stage used in the
British Isles
The British Isles are a group of islands in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isl ...
. It precedes the
Pastonian Stage
The Pastonian interglacial, now called the Pastonian Stage (from Paston, Norfolk), is the name for an early or middle Pleistocene stage used in the British Isles. It precedes the Beestonian Stage and follows the Pre-Pastonian Stage. Unfortunately ...
and follows the
Bramertonian Stage
The Bramertonian Stage is the name for an early Pleistocene biostratigraphic stage in the British Isles. It precedes the Pre-Pastonian Stage (Baventian Stage). It derives its name from Bramerton Pits in Norfolk, where the deposits can be found ...
. This stage ended 1.806
Ma (million years ago) at the end of Marine Isotope Stage 65. It is not currently known when this stage started. The Pre-Pastonian Stage is equivalent to the Tiglian C4c Stage of Europe and the Pre-Illinoian J glaciation of the early
Pre-Illinoian Stage of North America.
[McMillan, A.A., 2005, ''A provisional Quaternary and Neogene lithostratigraphic framework Great Britain'', Netherland Journal of Geosciences. vol. 84, no. 2, pp, 87-107.][Gibbard, P.L., S. Boreham, K.M. Cohen and A. Moscariello, 2007]
''Global chronostratigraphical correlation table for the last 2.7 million years v. 2007b''
jpg version 844 KB. Subcommission on Quaternary Stratigraphy, Department of Geography, University of Cambridge, Cambridge, England
Pollen evidence indicates that there were climatic fluctuations from cooler to warmer climates throughout this stage.
References
External links
*anonymous, 2007
''Global correlation tables for the Quaternary'' Subcommission on Quaternary Stratigraphy, Department of Geography, University of Cambridge, Cambridge, England.
Further reading
*Bowen, D.Q., 1978, ''Quaternary geology: a stratigraphic framework for multidisciplinary work. '' Pergamon Press, Oxford, United Kingdom. 221 pp.
*Ehlers, J., P. L. Gibbard, and J. Rose, eds., 1991, ''Glacial deposits in Great Britain and Ireland.'' Balkema, Rotterdam. 580 pp
*Mangerud, J., J. Ehlers, and P. Gibbard, 2004, ''Quaternary Glaciations: Extent and Chronology 1: Part I Europe'', Elsevier, Amsterdam.
*Sibrava, V., Bowen, D.Q, and Richmond, G.M., 1986, ''Quaternary Glaciations in the Northern Hemisphere, Quaternary Science Reviews'', vol. 5, pp. 1-514.
See also
*
Ice age
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gre ...
*
Glacial period
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betwe ...
*
Last glacial period
*
Timeline of glaciation
There have been five or six major ice ages in the history of Earth over the past 3 billion years.
The Late Cenozoic Ice Age began 34 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago ...
Glaciology
Pleistocene
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