Park Bulletins on Nature & Science
About the Delaware Water Gap
How the Gap Formed
What is a "water gap"? Theories of its origins, and descriptions of other gaps in the area.
Advanced Mt. Tammany Geology
Notable geological features on the way to the top of Mt. Tammany, including a map of the Red Dot and Blue Blazed Trails. For advanced students of geology.
Reasons for the quarantine on firewood from outside the park: asian longhorned beetle and emerald ash-borer.