What were the common features of early American civilization?

Following were the main features of early American civilization:

• In early American civilization people were more skilled in the art of stone. Their tools were made up of stones. Metals were used to make ornaments only.
• Agriculture was their main profession.
• The people of early American civilization were not familiar with cattle rearing.
• Utensils, weaving, etc. were made by the people of this civilization.