Why is the information available to archaeologist about early native american culture is very limited?

The primary reason for the limited information available to archaeologist about early Native American culture is their inability to record their history in tangible ways like artifacts or remains of the houses etc; instead they passed on the information orally. Their houses etc were made of mud or wood which by time were affected by biodegrading and nothing was left behind. 

the dominoes began to fall. the surrender at appomattox took place a week later on april 9. while it was the most significant surrender to take place during the civil war, gen. robert e. lee, the confederacy's most respected commander, surrendered only his army of northern virginia to union gen. ulysses s. grant

explanation:

a molly pitcher

b martha washington

c betsy ross