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Boreal period

Geological epochClimatic stageSubstageBeginning (approximately) years agoIUGS Tier
HoloceneSubatlanticWarming800Meghalai
Chill1800
Warming2600
SubborealChill3200
Warming4200
Chill5700North Violian
AtlanticWarming~ 6000
Chill~ 7000
Warming7800
BorealChill8200
Warming10,500Greenlandic
PreborealChill~ 11000
Warming11,700
Pleistocene
Late dryasChill12,900Tarantinsky
Only for Northern Europe. Calibrated Dates

The boreal period is the climatic period of the Holocene in northwestern Europe. Lasted from 8690 to 7270 BC. er [1] It is part of the Blitt-Siernder sequence , spanning the last 14 thousand years. It was preceded by a pre- pore period , followed by an Atlantic period . The boreal period corresponds to the pollen zone II of the Dutchman V.H. Zagain (1986) [2] and zone V Litta et al. (2001) [3] .

Content

Climate

The first climatic maximum of the Holocene epoch, the early Atlantic period, is more often included in the next Atlantic period . The average annual temperature at this time was significantly higher than the current.

Marine Geology

Sea level was slowly rising as a result of the global melting of ice: the boreal period was the last Holocene period, during which Britain was connected to the European continent by land isthmus ( Doggerland ). The area of ​​the North Sea has expanded. In place of the former Ioldian Sea, a closed Antsilovoe lake arose, whose boundaries far exceeded the modern Baltic Sea .

Plant and Animal World

In the boreal period, heat-loving plants, such as common ivy and white mistletoe , which spread all the way to Denmark, spread in northern Europe. Within the limits of the pollen zone V, pioneer plants ( de: Pionierpflanze ) of the preboreal period are increasingly being replaced by coniferous forests in symbiosis with common hazel , which in the palenology has received the name pine-walnut forest .

By the end of the boreal period, the composition of the vegetation changes - the number of different oak species grows, and the geographical zone of oak-mixed forests gradually forms. Instead of pine , birch and hazel , oak , elm , linden and alder are increasingly common. In the marshy territories, such species as the cattail broadleaf grow.

Such animals include deer , wild boar , wolf , bear , lynx and tour . Beaver and otter live in swampy territories and in rivers, such fish as pike and catfish are often found.

Boreal Man

The Boreal period in human life corresponded to the Mesolithic - the period when people in Central and Northern Europe more and more often settled down in permanent places, although they remained committed to hunting and gathering . Although agriculture was already spreading in the Middle East and Southern Europe by that time, the transition to it would take place only a few millennia later: this is due to the fact that the forest provided enough food for the local inhabitants, so the benefits of slash-and-burn farming were first The pores were not obvious. [4]

Some features of the way of life of people of the boreal period have become known from the monument to Vys 1 on Vychegda [5] [6] . The inhabitants of this settlement were able to make baskets and nets from plant fibers. The finds of oars indicate the regular use of boats. In winter, skids were used as a vehicle. Weapons found: bows, arrows and spears, as well as household items with decorations in the form of snakes, people and animals.

Notes

  1. ↑ Gliederung des Holozän. Archive dated May 10, 2015 at Wayback Machine Geozentrum Hannover (pdf-Datei, 405 kB)
  2. ↑ Waldo Heliodoor Zagwijn (1986) Nederland in het Holoceen // Geologie van Nederland, Deel 1, 46 S. Rijks Geologische Dienst Haarlem. Staatsuitgeverij. 's-gravenhage
  3. ↑ T. Litt, A. Brauer, T. Goslar, J. Merkt, K. Balaga, H. Müller, M. Ralska-Jasiewiczowa, M. Stebich & JFW Negendank (2001) Correlation and synchronization of Europe based annually laminated lacustrine sediments // Quarternary Science Reviews. Vol. 20 pp. 1233–1249
  4. ↑ JAA Bos (1998) Aspects of the Lateglacial-Early Holocene vegetation development in Western Europe. Palynological and palaeobotanical Investigations in Brabant (the Netherlands) and Hessen (Germany). Dissertation // LPP Contributions Series, vol. 10. Utrecht
  5. ↑ GM Burov (1990) Die Holzgeräte des Siedlungplatzes. PM Vermeersch und P. van Peer. Leuven. University Press. pp. 335-344
  6. ↑ GM Burov. (1996) On Mesolithic Means of Water Transportation in Northeastern Europe // Mesolithic Miscellany. pp. 5-15. vol. 17. # 1 ア ー カ イ ブ さ れ た コ コ не (Unc.) . The appeal date is July 27, 2010. Archived September 25, 2006.
Source - https://ru.wikipedia.org/w/index.php?title=Boreal_period&oldid=101150962


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