Thought I'd move my post info over for you Dan.
Notes on Microparticle Concentration and Electrical Conductivity of a 700 m Ice Core from Mizuho Station, Antactic:
Published in "Annals of Glaciology 1988" - " depth of microparticle concentration, electrical conductivity and Oxygen 18 at circa 1600 BC indicates a spike in readings for all of these elements. The evidence shows that this disturbance covered this designated period, but with a huge spike at c. 1600 BC. Similar evidence from the same source article exists at 5200 BC. This period shows a less severe but similar period. The oxygen 18 profile is close to normal, but there is a viable volcanic dirt band. ...it appears to correspond to the ash band from the Byrd station core"
"Nature", November 1980 article - Hammer, Clausen and Dansgaard date a disturbance from the Camp Century core to 5470 BC +/- 120 years. "This compares to the proposed Hekla eruption which was radiocarbon dated to 5450 BC +/- 190 years. There is a appreciably high acidity signal at therse sections of the core which indicates a high level of volcanic activity" once again right at the 3600 year cycle mark.
M. Legrand and R. Delmas of the Laboratory of Glaciology - "Soluble Impurities in Four Antarctic Ice Cores over the last 30,000 years" article 1988 Annals of Glaciology - "Oxygen 18 variations and the ionic components NH = NH (sub4) and Ca (sup 2) tha H and Cl and NO (sub 3) and SO (sub 4). The time scale for each ionic component level as well as the Oxygen 18 levels stretches back 30,000 years. Spikes at 5200 BC, 8800 BC, 12,400 BC, 16,000 BC, 19,600 BC... indicate times of great geological stress."
Now interestingly enough, southern ice cores do not register the same as the northern ones do. The northern ice cores begin to register slowly with the first true spike at around 1644 BC.
It would seem that once again the Northern hemisphere is on the data base... Ice age indications due to global event? Hmmmm...
Also... The strongest spike recorded lands around 8800 BC. which includes salt water and more intense molecular solidity, as does the 12,400 BC event.
Now I was recently contacted by a person who has concurrent findings in Greece, these are core samples in fresh water lakes. Also on the findings: Events every 3600 and 1600 years.
Peace of Mind,
Worm.