ony . ▁ ▁One ▁possible ▁explanation ▁for ▁the ▁extreme ▁def ic iency ▁in ▁arch ae ological ▁evidence ▁is ▁sh or eline ▁er os ion . ▁The ▁northern ▁shore ▁of ▁Ro ano ke ▁Island , ▁where ▁the ▁Lane ▁and ▁White ▁colon ies ▁were ▁located , ▁lost ▁ 9 2 8 ▁feet ▁( 2 8 3 ▁m ) ▁between ▁ 1 8 5 1 ▁and ▁ 1 9 7 0 . ▁Ext rap ol ating ▁from ▁this ▁tr end ▁back ▁to ▁the ▁ 1 5 8 0 s , ▁it ▁is ▁likely ▁port ions ▁of ▁the ▁settlement s ▁are ▁now ▁under water , ▁along ▁with ▁any ▁artifact s ▁or ▁signs ▁of ▁life . ▁ ▁Site ▁X ▁ ▁In ▁November ▁ 2 0 1 1 , ▁research ers ▁at ▁the ▁First ▁Col ony ▁Foundation ▁noticed ▁two ▁correct ive ▁patch es ▁on ▁John ▁White ' s ▁ 1 5 8 5 ▁map ▁La ▁Vir g inea ▁Par s . ▁ ▁At ▁their ▁request , ▁the ▁British ▁Museum ▁exam ined ▁the ▁original ▁map ▁with ▁a ▁light ▁table . ▁ ▁One ▁of ▁the ▁patch es , ▁at ▁the ▁confl u ence ▁of ▁the ▁Ro ano ke ▁and ▁Ch owan ▁rivers , ▁was ▁found ▁to ▁cover ▁a ▁symbol ▁representing ▁a ▁fort . ▁ ▁As ▁the ▁symbol ▁is ▁not ▁to ▁scale , ▁it ▁covers ▁an ▁area ▁on ▁the ▁map ▁representing ▁thousands ▁of ▁acres ▁in ▁Bert ie ▁County . ▁ ▁However , ▁the ▁location ▁is ▁pres umed ▁to ▁be ▁in ▁or ▁near ▁the ▁ 1 6 th ▁century ▁We ap eme oc