Were you looking for the Icon Legion 18x18 Argus sub zone, Petrified Forest?
The RPG Icon 16x36 This article concerns content exclusive to Warcraft RPG and thus unlikely to be canon.

The Petrified Forest is an expanse at the southern end of Felwood that consists of trees and ancients turned to stone. The stone corpses of the sentient trees have looks of terror forever etched upon their granite faces, and they are frozen in poses that suggest they were caught in some nightmarish explosion.[1]

Appears to be a similar history to what happened in the Irontree Woods to the North.

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