Resource dungeon

Resource dungeons (also known as RDs, ResDgs, and Surface Dungeons) were released July 19, 2010. Each dungeon requires a minimum Dungeoneering level to enter it, and will give a one-time experience reward for discovering it — along with other resources. These resources include new monster spawns such as Frost dragons and new Mining rocks, Prayer experience in the form of Frost dragon bones, trees, and herb spawns. Note that while an experience bonus is given for finding a dungeon, tokens are not awarded to match the bonus. This is similar to using experience lamps or penguin points to train Dungeoneering, as neither of those methods award tokens either. Finding all fourteen currently released dungeons gives a total one-time experience reward of 86,600 xp or 12,000 xp for non members.

Effect on economy
A large sum of rare resources are introduced to the economy as of result of these dungeons. A lot of these items suffered a price drop such as limpwurt roots and almost all herbs and ores such as runite ore. Although maple logs didn't suffer from the new dungeons most likely because members powerchop those. However, players with high dungeoneering are likely to have high Opportunity costs compared to other players, and do not spend extended periods of time harvesting commodity resources, so the economic effects of high-level resource dungeons are limited.

Dungeons
There are currently a total of 15 resource dungeons. These are all accessible as soon as the required level is reached, except for the Braindeath Island 'Rum'geon, which also requires the completion of a quest, A Clockwork Syringe.

Trivia

 * Resource dungeons were first mentioned in the May 2010 Developers' Blog Beyond the Release and mentioned again in the July Behind the Scenes update.
 * The Behind the Scenes stated that "there are more than fifteen" resource dungeons, but the initial release included only fourteen. Mod Emilee stated that they put the wrong number. (Appeared in FAQ of that week)
 * On release, the Knowledge Base said that the volcano dungeon's contents were "implings" and that lesser demons were the only monsters in there. In fact, implings are not in there at all and imps are the other monster with the lesser demons.