"Late-Glacial Climatic Oscillation in Atlantic Equivalent to the Alerod/ Younger Dryas Event" Robert J. Mott, Douglas R. Grant, Ralph Stear and Serge Occhetti.
The shores of Newfoundlandland and New Brunswicke at ca 10000 BC were lined with birch and spruce trees during a relatively warmer interval, but were struck with a sudden "widespread and synochrous climatic disturbance of sufficient magnitude to strongly affect depositional environments throughout Atlanic Canada." Organic deposition was replaced by mineral deposition and sand banks covered the former forest beds at about 11000 years ago. the mineral deposits covered over all ponds, lakes, peat beds, land areas and water courses [in fact the Carolina Bays were filled in with similar sediment at the same time. see photo below for Carolina bays] This is asociated with "Stirred" sedimrentary layers and false radiocarbon dates.
This event is correlated to North Atlantic cores which demonstrate that at 14000-15000 BP the polar front lay across the Ocean at about 40 degrees North back to a nearly "modern" polar front N. of Iceland before 11000 years ago (C14 dates about 9200 BC) and then with an excursion to another polar front as before at almost exactly 11000-10000 BP C14 nonadjusted dates, averaging at Muck's date of ca 8500 BC for this event. Furthermore there is an ash bed full across the North Atlantic at exactly this same level, and it extends from New England to Iceland to Scandinavia again at the dates estimated at 8500-8600 BC. From the depositional qualities mentioned in the article, it wseems there was a massive wave scouring off the coastlines before the glacial advance : Water and then followed by Ice: increased precipitation and erosion, including flushing sediments into the ocean beds, had occurred BEFORE the glaciers had re-advanced. This Younger Drryas event was one of global scope: "Not simply a North Atlantic regional phenomenon resulting from ice shelf breakup, meltwater diversion, reorientation of atmospheric flow or deepwater production" although all of threse things were asociated with the event.
Illustration of the "Black Bed" layer in a cross-section of a hillside The Black beds are visually distinctive And there are the Black beds everywhere, indicating the precipitation out of black carbonaceous (sooty) material out of the Atmosphere over a wide area.
Zhirov's chart on p. 382 includes #13, Great volcanic eruptions of the North Atlantic after Bramlette and Bradley, Klenova and Larov, and the Piggott-Urrey cores, at about 10000 years ago.
#14 End of Allerod interstadial in Europe after Barendsen, Deevey and Gralenski approx 9500-8500 BC [Thereafter the Dryas Glacial period-DD]
#15, First considerable penetration of warm Atlantic waters into the Arctic ocean after Yermolayev, 1000 to 8000 years ago (ie, earliest Postglacial 8000 to 6000 BC: and this also includes spreading of loose Atlantic volcanic debris into the Arctic Ocean near Spitzbergen noted by more recent American authors)
#16 Latest eruption of the Eifel volcano after Straka, 9350 years ago or 7350 BC
Elsewhere Zhirov also notes a lava flow on the site of modern Mexico city at just before 8100 BC
The Smithsonian Institution's publication Volcanores of the World list the following from the earliest Postglacial period (Glacial-period eruptions are not on this list):
ca 8000-9000 BC Lassen Peak, California
ca 8600 to 8000 BC, Eifel Volcanic field
ca 8450 to 8150 BC, Mount Shasta, California
ca 8250 to 8050 BC, Emuangogolak, East Africa
ca 8100-8000 BC, Taupo volcanic crater New Zealand (very large)
ca 8100-8000 BC, Mt Edziza, Canada
ca 8250-8000 BC (possibly less) Chaine des Puys, France
ca 8040-7635 BC SW Lake, Taupo fields,New Zealand
b.7900 BC, Ruapehu, New Zealand (very large)
b. 7900 BC, Lipari Islands, Italy
ca 7750 BC, Taupo volcanic crater, New Zealand (very large)
ca 7950- 7550 BC Tongariro New Zealand (very large)
ca 7750-7500 BC, Hijiori, Japan
ca 7610-7475 BC, Mt Adams, Washington
ca 7660-7460 BC Witori group, New Britain, Melanesia
ca 7530 -7440 BC, Luinaya Pas'i, Kurile Islands, Siberia (very large)
ca 7530-7000 BC, secondary cone formation at Mt Shasta (very large)
ca. 7500 BC, Ushiship caldera, Kurile islands, Siberia
The Denise skeleton was buried in a lava flow associated with Le Puy and was considered very ancient as a result, but it turns out to be final-Pleistocene because the contemporaneous skeleton of a mammoth later also turned up in the same stratum. The Laschamp magnetically inverted period is associated and this lava flow is magnetically reversed. The latest possible date of this would be 7500- 8000 BC as the date of a sediment laver over the deposits.
A lava flow at Mauna Kea, Hawaii, is thought to date from the end of the Pleistocene, 8000-9000 BC. (Volcanoes in the Sea, Gordon A. MacDonald, 1983) There are also mudslides in late-Pleistocene Hawaii that are simultaneous to mudslides in the Cascade mountains area, including Mt St Helens.
Charles Hapgood in Path of the Pole mentions five Japanese volcanoes thought to have erupted at the end of the Pleistocene (C14 dates estimated variously at 7000 to 12000 BC, p 135-136) and he notes the volcanoes in Patagonia gioing off simultaneously(Dated asaround 8000 to 7000 BC). Furthermore he quotes Frank Hibben of the U of New Mexico as to the existance of lava debris beds in association with the quickfrozen Mammoth beds of Siberia and Alaska.(Hibben, Frank C, The Lost Americans, 1946). There are also extensive lava flows in Central Asia at this time: all of these flows are at dates around 8000-9000 BC (Radiocarbon-non-adjusted)
Fred M Bullard's Volcanoes of the Earth, 1984, gives us the further information:
Mt Mazuma (>Crater Lake) erupted several times prior to its final explosion at about 6000 BC which blew 15 cubic miles off the top of the mountain (p 83). The original cones of Mt Aetna, Krakatoa and Vesuvius are thought to have formed during eruptions at the end of the Pleistocene. There might well have been lesser eruptions at Thera/Santorini at this same period in time.(p 85-87)
Sometime about 10000 years ago a volcano erupted in Nicaragua leaving ash beds which preserve the tracks of ice-age animals and people. Mount Pelee, Martinique is also formed inside a prehistoric caldera (p 121) Pelee and other volcanoes on Guadeloupe and Dominica were volcanically very active at the close of the pleistocene (118-119)
Mount Lanington, Papua New Guinea, also erupted at this time, somewhere between 9000 and 11000 BC (p 147) Jamaca isd not volcanic, but it experienced massive earthquakes which collapsed a large part of its cave system and tuned the collapsed areas into "Valleys"
Iceland is covered with late-Pleistocene lava flows thought to date to 8000-9000 BC. The Westmann Islands were built up in eruptions of that age and lay quiescent for 6000 years or more after that, until the building up of the recent volcanic island Surtsey.
Mount Baker began in a series of eruptions starting about 8300 BC and continuing up to about 6000 BC. Mount Ranier experienced a major eruption which blew away half of its original mass and generated large mudflows at about the same time (p 592) Mount St Helens erupted several times in succession at this time, and has interbedded lava flows with glacial deposit layers (p 547). Mount Newberry in Oregon had a great eruption at about 7000 BC (Frederick Johnson in "Radiocarbon Dating", 1951)
And besides the eruptions at the Azores, there were apparently other erutptions of the Canary Islands , including periods of submergence into the ocean and subsequent re-emergence, plus possible eruptions in the mid-Sahara and possibly elsewhere in Eastern Africa.