This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Open the Resonite cask with the Enchanted Resonite Crystal, and then slay Goggeroc. Return to Mor'rogal with the news and Enchanted Resonite Crystal.
I fear if we do not dispose of this threat immediately, all of Stonetalon will be lost. The might of an Earthen can not be matched by any means. When awakened, Goggeroc will be weak from his long slumber, this will be the opportunity that you must take advantage of... go now <name>!