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The half-life is the time taken for an amount of a radioactive isotope to decay to half its original value.

Because this decay is constant it can be used as a “clock” to measure elapsed time assuming the starting amount is known.

It took place in geochronological interval — 8—9 thousand years.

Holocene and Late Pleistocene strata is stratified. Summarized geochronological (stratigraphic) scale of sediments in the Black Sea (Nevesskiy, 1967; Fedorov, 1978) Era Eratema Period System Epoch Series Subepoch Subseries Age stage Sub-age Sub-stage Index Chron.

It took place in geochronological interval 8-9 thousand years. Dimitrov Institute of Oceanology - BAS, Varna, Bulgaria RADIOCARBON DATING (14C) OF THE SHELF AND DEEP SEE SEDIMENTS OF THE BLACK SEA Numerous radiocarbon (14C) dating organic material of mollusk and bottom sediments were made.

Holocene and Late Pleistocene strata is stratified. Objective of the research was absolute age determinination for geocatastrofic occurense and the beginning of sapropele formation.

Key words: Radiocarbon dating (14C), shelf sediments, deep see sediments, diatoms analyses, mollusk fauna, palynological analyses. Scale, million years Quaternary Holocene Chernomorian Newcher Djemetinian Qiv dj(Hl3) 0.003 nomorian Oldchern Kalamitian Qiv kl Qiv vt omorian Vityazevian (Hl2) 0,007 Orian Bugazian Qiv 0.01 bg(Hl1) Neozoic Pleistocene Upper Neoeuxine Upper QIII nev Lower 0,03 Karangatian Upper QIII krg Middle Lower 0,12 Middle Uzunlar QII uz 0,20 Ancient QII dev 0,35 Euxine Lower Chaudian Upper QI tsch 0,73 Lower eo Pleistocene Gurian Qg 1,81 Neogene Pliocene Upper Kujalnik N2 ku 3,40 Lower Kimerian N2 k 5,30 Middle Pont 2,3 N2p 6,50 Miocene Upper Pont 1 N1p 7,50 Lower Meotian N1m 11,2 Middle Sarmatian N1s 16,3 Paleogene Oligocene Maykop Pg3 N1 35,4 Eocene Pg2 54,8 Paleocene Pg1 65,0 Mesozoic Cretaceous K The age of the muds containing Dreissena rostriformis distincta found in the lower part of drill 2362 in the periphery of the shelf turned out to be nearly 30 thousand years.

Many drills of the shelf and its periphery in the bar zone, where the most complete cross-section of the Upper Pleistocene sediments was established, underwent radiocarbon datings to determine the age of sediments (table 1). Probably they are lie over muds with Mediterranean fauna. New data of the Pleistocene terraces and the paleography of the Bulgarian Black Sea shelf.

Recall that atoms are the basic building blocks of matter.

Atoms are made up of much smaller particles called protons, neutrons, and electrons.

This is the British International School Phuket’s IB maths exploration (IA) page.

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