av ated , ▁and ▁in ▁ 1 9 5 9 , ▁when ▁seven ▁m ounds ▁were ▁partially ▁exc av ated . ▁ ▁The ▁major ▁period ▁of ▁occupation ▁at ▁this ▁site ▁was ▁during ▁what ▁is ▁now ▁designated ▁the ▁Bir n irk ▁culture , ▁between ▁ 5 0 0 ▁and ▁ 9 0 0 ▁CE . ▁ ▁Ev idence ▁was ▁also ▁found ▁at ▁one ▁m ound ▁of ▁occupation ▁during ▁the ▁later ▁Th ule ▁culture , ▁which ▁was ▁generally ▁active ▁ 1 1 0 0 - 1 4 0 0 ▁CE . ▁ ▁Find s ▁at ▁the ▁site ▁include ▁har po on ▁heads ▁made ▁of ▁ant ler ▁and ▁stone , ▁including ▁at ▁least ▁one ▁from ▁the ▁older ▁P un uk ▁culture . ▁ ▁Also ▁un cover ed ▁were ▁fragments ▁of ▁wood ▁making ▁up ▁elements ▁of ▁traditional ▁se al - h un ting ▁um ia ks . ▁ ▁The ▁site ▁was ▁declared ▁a ▁National ▁Historic ▁Land mark ▁in ▁ 1 9 6 2 , ▁and ▁was ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁ 1 9 6 6 . ▁ ▁The ▁major ▁collections ▁of ▁materials ▁from ▁the ▁site ▁made ▁in ▁the ▁ 1 9 5 0 s ▁were ▁located ▁at ▁Harvard ▁University ' s ▁Pe ab ody ▁Museum ▁of ▁Arch ae ology ▁and ▁Eth n ology ▁for ▁many ▁years , ▁but ▁were ▁moved ▁to ▁the ▁University ▁of ▁Al aska ▁Museum ▁of ▁the ▁North ▁in ▁Fair b anks ▁in ▁ 2 0 1 1 . ▁ ▁See ▁also ▁List ▁of ▁National ▁Historic ▁Land marks ▁in ▁Al