The Pelöri (Q. "The fencing or defensive heights"), also called also the Mountains of Aman and the Mountains of Defense,were raised by the Valar after the destruction of their dwelling on Almaren;They were ranging in a crescent from north to south, close to the eastern shores of Aman.
Read Sil37,39, 47,57,59. 73-4. 80,100-2,174; UT36.