Artefacts including swords, lances and combs uncovered at Hadrian's Wall

[darkbeaver]

Firstly, Comet Halley has a variable orbital period of [around] 76.5 ± 2.5 years.
Halley’s orbital period over the last 3 centuries has been between 75–76 years, although it has varied between 74–79 years since 240 BC.

Gunnar Heinsohn very politely points out the 700 years between the 230s and 930s AD “have neither strata nor tree samples”.
Therefore, some 700 years of the 1st millennium (230 to 930s) have neither strata nor tree samples for C14 or dendro-chronological dating.
Archaeological Strata Versus Baillie’s Tree-Rings: Proposal for an Experiment
Gunnar Heinsohn – 8 Sept 2014
http://www.q-mag.org/_media/gunnar-strata-vsbaillie08-09-2014.pdf

 

[Blackleaf]

Firstly, Comet Halley has a variable orbital period of [around] 76.5 ± 2.5 years.
Halley’s orbital period over the last 3 centuries has been between 75–76 years, although it has varied between 74–79 years since 240 BC.

Gunnar Heinsohn very politely points out the 700 years between the 230s and 930s AD “have neither strata nor tree samples”.
Therefore, some 700 years of the 1st millennium (230 to 930s) have neither strata nor tree samples for C14 or dendro-chronological dating.
Archaeological Strata Versus Baillie’s Tree-Rings: Proposal for an Experiment
Gunnar Heinsohn – 8 Sept 2014
http://www.q-mag.org/_media/gunnar-strata-vsbaillie08-09-2014.pdf

Halley's Comet last came by in 1986. I know the years just after that suffered a temporary decline in standards of music, with the likes of Vanilla Ice, Aqua, Mr Blobby, Vengaboys and Eiffel 65 dominating the charts, but I can't recall there being another dark age.

 

[darkbeaver]

Take note of the variability of comet Halleys orbit.