What chronological framework does the Mesolithic era have?

It has a chronological framework – 12-7 thousand years BC. The Mesolithic itself is also called the Middle Stone Age. During this period of time, the ice age almost ended, the glaciers were leaving, thus, the young mankind began to calmly develop in the new world. So soon a person was able to master new types of occupation, namely: agriculture and cattle breeding, which greatly influenced the level of development of human civilization. Then he mastered the processing of the first metals, and around 3500 BC he learned to write.