Places in Middle-earth
Region: Beleriand & North
Meaning: the long wall
But south of Aelin-uial the land fell suddenly and steeply; and all the lower fields of Sirion were divided from the upper fields by this fall, which to one looking from the south northward appeared as an endless chain of hills running from Eglarest beyond Narog in the west to Amon Ereb in the east.... Narog came through these hills in a deep gorge, and flowed over rapids that had no fall, and on its western bank the land rose into the great wooded highlands of Taur-en-Faroth. On the west side of this gorge... [lay] Nargothrond. But some twenty-five leagues east of the gorge of Nargothrond Sirion fell from the north in a mighty fall below the Meres, and then he plunged suddenly underground into great tunnels that the weight of his falling waters delved; and he issued again three leagues southward with great noise and smoke through... the Gates of Sirion.
This dividing fall was named Andram, the Long Wall, from Nargothrond to Ramdal, the Wall's End, in East Beleriand. But in the east it became ever less sheer, for the vale of Gelion sloped steadily southward, and Gelion had neither fall nor rapids throughout his course, but was ever swifter than was Sirion. Between Ramdal and Gelion there stood a single hill of great extent and gentle slopes, but seeming mightier than it was, for it stood alone; and that hill was named Amon Ereb.... But south of the Andram, between Sirion and Gelion, was a wild land of tangled forest in which no folk went...; Taur-im-Duinath it was named, the Forest between the Rivers.
The Silmarillion, Quenta Silmarillion, Ch 14, Of Beleriand and its Realms
Contributors: Elena Tiriel 10Dec07