Glacial maximum
Glacial maximum period that occurred approximately 110,000 to 10,000 years ago. The scientist that study Geology report that around Norway, Sweden, Finland, and north Europe was covered by a thick ice sheet, directly above the current Bothnia Sea the ice layer over land was 2-3 km thick at the max about 90 000 BC.
Glacial maximum depressed the earth, and water eroded it as the glaciers melted. When the glaciers melted they released a lot of fresh water which turned into high inland lake before it was released out to the oceans. The last sight of the glaciers is estimated to have been around 11000 -10000 BC. Some of the antiquity finds in Finland are pieces of pottery, flint; quarts chips at old camp sites are estimated to be 6000 – 8000 old, and other cave paintings that are estimated to be from around 10 000 BC.
The Boreal season was a cool season shortly after the end of the last ice age
About 10 500-8 000 years ago, the early Holocene glacial ice sheet melted away from Europe.
The weather was dry and warm. The temperature was pretty close to the present. In this case, the Nordic countries spread of mixed forests, which were made of birch and pine. Pine became common in the Central Lapland. The Boreal period was drier and more in southern Finland was the end of the period up to 1 degree warmer than the present, and in southern Finland arrived in a warmer climate species of flora.