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Delaware Water Gap National Recreation Area
Park Bulletins on Nature & Science
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How the Gap Formed
What IS a "water gap"?
Theories of its origins; other gaps in the area. (2 pages)

 
Grayish outcrop of quartzite rock

Advanced Mt. Tammany Geology
(for use of those versed in geology)
18 notable geological features on the way to the top of Mt. Tammany. Includes map of Red Dot/Blue Blazed Trails (1 page)

 
purple trillium, Dingmans Ravine PA

Trail Guide to Dingmans Ravine

 
asian longhorned beetle
Firewood pests
Reasons for the quarantine on firewood from outside the park:
asian longhorned beetle and emerald ash-borer (1 page)

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A ranger taking a sample of water from a creek

Did You Know?
... that the Middle Delaware River exceeds ordinary federal standards for clean water. Because of this, special higher standards have been set for the river, so it does not "deteriorate" to being just "clean enough." The river in this park is, and will remain, truly "cleaner than clean."
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Last Updated: September 15, 2011 at 11:30 MST