Talk:Middle Dryas

Deletion of redirect
I have deleted the redirect to Allerød oscillation. This is clearly wrong as the Allerød was a warm period and all sources confirm that a Dryas (named after the Arctic plant) was a cold period. The term Middle Dryas is used by experts, but it is not clear what it means. The succession (between about 16,000 and 11,700 years ago) is Oldest Dryas (cold), then Bølling oscillation (warm), then Older Dryas (cold), then Allerød oscillation (warm), then Younger Dryas (cold). This does not seem to leave room for a Middle Dryas, unless it is another term for Older Dryas, but I cannot find a source to confirm this and both are sometimes used together. I suspect that there is no agreed definition, but just different usages by different experts. Dudley Miles (talk) 14:26, 25 October 2019 (UTC)
 * Looking further, the sequence above is used the great majority of experts. A few use Older (or Old) Dryas, then Middle (or Medium) Dryas, then Younger Dryas. I will change the redirect to point to Older Dryas. Dudley Miles (talk) 09:23, 26 October 2019 (UTC)