Gas

See also

Zircon - Deals with helium in zircon and its implications for radiometric dating.

Resources

Claim CD230: Natural gas escapes too fast to allow for long ages

Brief response in the Index to Creationist Claims in the TalkOrigins Archive.

Young-earth "proof" #18: The incredible pressure found in oil and gas wells indicates they have been there less than 15,000 years. (Presumably, the oil or gas would have escaped long before then.)

Article by Dave E. Matson on the Secular Web site. Also available in the TalkOrigins Archive.