Show geographic division Il edmont plaines plaints lg Is a name used in he w of the united states I 1 de designate agnate that part of the atlantic const si ri uin which lies between tho the ap alac lachlan llan and the low coast it plain pro iier it Is IB r roni oni tile tiie latter fatter topo by bee mure more rugged and eroded with cerer CV tr river v valleys alleys and geologically y colI consisting of much older and r rot ro t rua the chanz cham from ahe hard to the soft and recent formation Is marked by a definite line of espra escarpments over which nearby all the atlantic rivers fall in rapids or cataracts and the line Is known as the fall line the piedmont plain Is less defined in new lEn england langland gland than in the southern states it Is narrowest west and also approaches closest to the sea in new york and broadens southward being about miles 4 wide in north carolina |