These publications are freely distributed by the National Park Service. All require Adobe Acrobat Reader for viewing.
Archeology [130k PDF File]
Geology [161k PDF File]
Did You Know?
Pinyon pines do not produce pine nuts every year. These delicious nuts can only be harvested every three to seven years. This irregular schedule prevents animals from adapting to an abundance of pine nuts and guarantees that at least some nuts will become new pine trees instead of a quick meal.