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Along Chesler Park Trail in Canyonlands National Park: This photograph was taken looking up at the many layers of rock. Some of the layers are tan, some are red, and some are gray. Their ridges are smooth and rounded. Bushes and other plants are at their base.; Format: image/photograph

Angels Landing Trail, viewed from above, Zion National Park, Utah: Hikers on Angels Landing Trail, viewed from above, in Zion National Park, Utah. The trail was cut from a sheer drop of solid rock in 1926 and remains one of the park's most spectacular construction wonders. The top offers wonderful views of Zion Canyon. This...; Format: image/photograph

Bedding planes: In Lonely mountains: The monadnocks of the inner Piedmont, page 8; The quartzite layers that make up the pinnacle of Pilot Mountain also comprise the erosion-resistant cap rocks of Hanging Rock and the two ridges that separate these pinnacles. This uniformity suggests a common origin of this material, and geologists theorize...; By Dirk Frankenberg.

Blooming cactus in Zion National Park, Utah: A cactus, possibly a type of prickly pear, blooms in Zion National Park, Utah. Zion National Park is home to some of Utah's most diverse flora and fauna. It hosts over 900 species of plants, including at least 8 common varieties of cacti and many more succulents....; Format: image/photograph

A boulder of Roan Mountain gneiss: In Roan Mountain Highlands, page 7; Figure 5 shows a boulder of Roan Mountain gneiss quarried out of the mountainside and doing duty now as a persuasive "No Entry" signal to those thinking of using an off-limits Forest Service road. The bands of quartz show up nicely in this recently exposed...; By Jennifer Godwin-Wyer and Dirk Frankenberg.

Chelser Park Trail in Needles area of Canyonlands National Park: An old Pinion Pine tree with its twisted trunk stands before a terracotta red rock formation along the Chesler Park Trail in the Needles area of Canyonlands National Park. The tree has only sparse greenery on its highest branches. A healthy evergreen tree...; Format: image/photograph

Chelser Park Trail in Needles area of Canyonlands National Park: The Needles area is located in the southeast section of Canyonlands National Park. Visitors hiking along the Chesler Trail will see rock formations created by millions of years of erosion. The layers of sedimentary rock have rounded, smooth edges. Surrounding...; Format: image/photograph

Chelser Park Trail in Needles area of Canyonlands National Park: This image shows the smooth tops of rock formations seen from the Chesler Park Trail in Canyonlands National Park. The trail is located in the Needles section of the park. Just above the crests of the rocks, the tops of trees are visible. In the distance,...; Format: image/photograph

Chelser Park Trail in Needles area of Canyonlands National Park: Over millions of years sedimentary rock has eroded into the formations that are present today in Canyonlands National Park. This photograph shows the multi-colored layers of rock towering above the high desert floor below. The green scrubby bushes and trees...; Format: image/photograph

Chelser Park, Canyonlands National Park: These odd looking rock formations have mushroom-shaped tops. The base of the formations are terracotta red and the “caps” are tan. In the background taller formations can be seen with horizontal cracks running all the way across them. Green shrubbery...; Format: image/photograph

Chesler Park Trail in the Needles area of Canyonlands National Park: Formed over millions of years, these rock formations show the layers of sediment that were laid down and later became rock. The layers' colors are in tans, red, gray, and black. In the foreground, chips of stone line the trail while in the background the rock...; Format: image/photograph

Chesler Park Trail in the Needles area of Canyonlands National Park: This photograph shows how erosion has carved the sedimentary rock over millions of years. The boulder in the foreground is breaking down and chips of rock litter the ground next to it. The rocks in the background have perfectly straight horizontal cracks running...; Format: image/photograph

Chesler Park Trail, Canyonlands National Park: This photograph was taken from under an overhang along the Chesler Park Trail. Pinyon Pine and Juniper trees grow next to it. In the distance are rounded topped rock formations with layers of red and tan sedimentary rock.; Format: image/photograph

Church Rock, Utah: Church Rock is a rounded column of hard, tan sandstone. The rock has a small, hollowed opening at its base, supposedly created by a religious cult led by Marie Ogden in the 1920s and '30s. It is located near Moab, Utah.; Format: image/photograph

Clays of the Piedmont: Origins, recovery, and use: A “virtual field trip” through the North Carolina Piedmont and thousands of years of history explains the origin of Piedmont clays and how clay is made into pottery. With high-resolution photographs.; Format: slideshow (multiple pages)

A cliff on the way to the Emerald Pools in Zion National Park, Utah: A cliff on the trail to the Emerald Pools in Zion National Park, Utah. The trail is scattered with boulders as well as small trees and shrubs. The Lower Emerald Pool trail follows the North Fork of the Virgin River and is shaded by cottonwood and box elder...; Format: image/photograph

Coastal erosion and the ban on hard structures: In Recent North Carolina, page 4.3; North Carolina’s sandy coast is one of the state’s greatest tourist attractions, and also one of its frequent sources of controversy. The 301 miles of coastline in the east have been the site of an ongoing struggle between stable structures created by humans and the dynamic forces of nature, between property rights and thousands of years of geology. A 1985 rule designed to preserve the beaches in their natural state enjoys the support of coastal scientists but threatens the investments of home-owners and developers.; Format: article; By Emily Jack.

Colorful walls of Echo Canyon, Zion National Park, Utah: Colorful walls of Echo Canyon, Zion National Park, Utah. Echo Canyon is a slot canyon accessible from the East Rim Trail. The lower part of the canyon meets the main valley through a steep series of erosion-carved potholes and channels. Going further in the...; Format: image/photograph

Composition of Pilot Mountain: In Lonely mountains: The monadnocks of the inner Piedmont, page 6; When viewed up close, the pinnacle of Pilot Mountain is seen to be made of almost horizontal layers of rock. This rock is quartzite, and the horizontal lines between the layers are bedding planes that mark the tops of the individual quartzite beds....; By Dirk Frankenberg.

Dead tree in Canyonlands National Park: The twisted remains of a dead tree stands in front of the smooth tops of rounded rock formations along a Chesler Park trail in the Needles section of Canyonlands National Park. The sedimentary rock layers have been exposed over millions of years of erosion....; Format: image/photograph

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