This is a strange and sad proxy to consider in search of evidence that tells of events during the Holocene and later. But a recent paper by Cain G et. al. some weeks ago highlighted the importance of this subject. It is important because it shows directly the effect on humanity of these natural events. The name of the paper is “Prehistoric Coastal Mass Burials: Did Death Come in Waves?” published July 2018. The paper anticipates that the main actor in the cause of deaths is the tsunami. However it is here considered that the tsunami is a secondary event, the effect of a cause. The primary cause is something else. This thread points to evidence that uncovers the primary cause.
The correlation of dates to earlier material, plus what is inferred from the evidence, appears to corroborate events as elicited from previous research. One very important date from the paper is 5500BP (~3500 bce). Previous research, and as the megalithic calendar indicates, this was an Earth tilt change (a high-to-low). At first difficult to identify, this date showed up, along with others, from research on Iceland’s glaciers in a paper by D’Andrea et al “Glacier response to North Atlantic climate variability during the Holocene”.
The Cain paper not only identified evidence of mass burials dated to around 5500BP in Northern Scotland and Scottish isles, there were found indications of changed habitation; changed marine and terrestrial fauna (from before to after); changed terrain conditions, all indicating changed climatic conditions. This date also showed up in deep sea cores from the Arabian Sea. Then, Prof. P deMenocal identified in such cores a clear marker when the Sahara changed abruptly from wet to dry. The date: 5500 BP. In the North Atlantic proxy the date is a sharper ~3550bce.
Another later ‘second phase’ of mass-burial related evidence was also identified; nearer to 3000bce. An event, 3195bce, had been identified in tree-rings. This date is also associated with mass burials found in similar condition and related to megalithic sites in Central Med. In sea bottom deposits this shows up as a thick sapropel layer (see Searching Evidence – 2). Interestingly, at yet another site, the Ness of Brodgar, fresh habitation started after this date, post ~3000bce. Termination appeared abrupt around 2200bce, by in-fill containing cattle bones; similar as elsewhere in the Mediterranean. Cause: Earth tilt at 2345bce, also evident in C/N and megalithic calendar.
Particular dates, such as the above, show up from various unrelated sites but connected to mass burials, indicate that the root cause was a global event.
Ref: “To Cut a Long Story Short: Formal Chronological Modelling for the Late Neolithic Site of Ness of Brodgar, Orkney – EJA 2017.