Biological flora of the British Isles: Dryas
The Younger Dryas
lasted a thousand years and coincided with the extinction of mammoths and other great beasts and the disappearance of the Paleo-Indian Clovis people.
From analyses of the sedimentary record in GLM-01 it is clear that glaciers did not re-occupy the area after 13 000 calyBP (including the Younger Dryas
nana found in the studied Taboly mire were connected with the Late Glacial period (Figs 4, 5), most likely with the Allerod (TV and T4) and the Younger Dryas
Meltzer and his colleagues tested that hypothesis by investigating the existing stratigraphic and chronological data sets reported in the published scientific literature and accepted as proof by cosmic-impact proponents, to determine if these markers dated to the onset of the Younger Dryas
Danaidae 9 Dryas
iulia (Hubner) Nymphalidae 26 Junonia coenia (Hubner) Nymphalidae 45 Vanessa cardui (L.
Experts agree on the climate change that marked the start of the Younger Dryas
period, but are divided about its cause.
Also, at the end of the last glacial period, the Younger Dryas
period was a 1,300 year long return to glacial climates.
The 1,200-year-long cold spell, known as the Younger Dryas
, interrupted a warm period 12,900 years ago when the massive ice sheet covering much of Canada was melting.
Moist Non-acidic Tussock Salix reticulate, Saxifraga Tundra complex oppositifolia, Cares bigelowii, Carex membranacea, Dryas
integrifolia, Ledum decumbens, Equisetum ravens Shrub complex Betula spp.
Hunter-gatherer behavior; human response during the Younger Dryas
urbanum, (Herb Bennet or Wood Avens) and Dryas
octopetula, (Mountain Avens) are all common in Britain but in recent years hybridisation has given rise to an increasing variety of new flower colours.