Indications are that the glacier has been there throughout the Wisconsin Glacial Epoch
, which began over 100,000 years ago.
The chart, published in the February GEOLOGY, shows a drowned world of former river valleys, flood plains, and ancient lakes that would have been above sea level at the end of the last glacial epoch
, more than 10,000 years ago.
Then too you will be interested to know that there are many glacial boulders on the island and shore, of a granitic structure similar to the granite of Scotland, so it looks as if they were brought by the ice during the Glacial epoch
from their mother rock away off to the northwest in Scotland.
The observed instability with the proven occurrence of short warming events during the transition from the last interglacial to the last glacial epoch
could be, when viewed carefully, a general, naturally occurring characteristic of such transition phases," said Dr Tatjana Boettger of the UFZ, who analyzed the sediment profiles at the UFZ's isotope laboratory in Halle.
Called the Climate Long-Range Investigation and Mapping Program (CLIMAP), this effort found that the mix of plankton species currently living in the tropics closely resembles the community during the last ice age, signaling that minimal temperature change occurred there during the glacial epoch
During the last glacial epoch
, Earth repeatedly swayed from extremely frigid conditions to warmth and back again with startling speed.
Geologists in the past speculated that the melting of such ice at the end of the glacial epoch
could have stimulated volcanic eruptions by unweighting the crust.
Climate researchers have long thought that the Arctic held only thin sea ice during the last glacial epoch