Taonas
From The Stargate Omnipedia
Ancient outpost on planet Proclarush, virtually identical in design to the Atlantus outpost discovered under the ice of Antarctica on Earth. Taonas housed an Ancient star map and at least one active Zero Point Module, which powered its systems until SG-1 took it back to Earth.
With the planet overcome by volcanic activity and the outpost's protective dome compromised by SG-1's visit, is is likely that Taonas has been destroyed.
KEY EPISODE
Lost City, Part 2 - His mind under the control of Ancient knowledge, O'Neill identifies the outpost on Proclarush as "Taonas."