View of canyon walls at evening from Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
A fungus (?) on a birch, Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
Bottom of a canyon, view from Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
Erosion of a limestone rock at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Erosion forms of limestone on a rock shelter at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Erosion forms of limestone in a rock shelter at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Tree roots and erosion forms on a limestone rock at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Bamboo brushes on the bottom of a canyon near Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
View of rock shelters from the top of Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
Gray s Arch, view from rock shelters. Red River Gorge, Kentucky, November 6, 1999.
Gray s Arch, view from rock shelters. Red River Gorge, Kentucky, November 6, 1999.
Limestone erosion forms at Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
Mushroom-like limestone erosion forms at Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
Erosion of limestone near Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
View from Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
View of a canyon from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
Rhododendron in a canyon, view from Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
View from the top of Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
View from the top of Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
A.S. on Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
A.S. on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
Forest near Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
Flowers on a stone at Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
Pine forest on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Oak forest near Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
Rough Trail to Gray s Arch. Red River Gorge, Kentucky, November 5, 1999.
Rough Trail to Gray s Arch. Red River Gorge, Kentucky, November 5, 1999.
A small maple on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Mushrooms in moss at Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
A tree with very big leaves on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Multicolor maple leaves on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Blueberry and rhododendron bushes on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Unknown dwarf berries on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
Creeping fern among dry leaves and needles on Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
Forest below Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
Rhododendron, fir and maples near Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
Gray s Arch with rhododendron on foreground. Red River Gorge, Kentucky, November 6, 1999.
Rocks along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
Rocks and bushes along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
Bushes on rocks along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
View of Wabash River from a trail to Fort Ouiatenon. Indiana, November 13, 1999
Tobacco farm near Slade, Kentucky, November 5, 1999.
A dam in Russells Mills village, on Paskamansett River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 28, 2003
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 23, 2003
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 13, 2003
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 28, 2003
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 25, 2004
Mushroom rocks (differential weathering of shaded sides of rocks) in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Some whitish lichen on a limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Button lichen (Buellia) on limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Fall colors of Enfield gorge, view from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
Some dark-green crustose lichen on a limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Fall colors of Enfield gorge, zoomed, view from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
Bordered scale lichen (Psora pseudorussellii) on a limestone conglomerate rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Entrance to Nahal Tseelim River Gorge from Dead Sea, 2 miles north from Masada, view from a parking place. The Middle East, January 20, 2001
A.S. at entrance to Nahal Tseelim River Gorge from Dead Sea, 2 miles north from Masada, view from a parking place. The Middle East, January 20, 2001
Rocks, a pond and a foot bridge of Maple Trail, view from East Trail in Lost Maples State Natural Area. Vanderpool, Texas, November 8, 2008
Rock shield lichen (Xanthoparmelia) on a mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
Rock shield lichen (Xanthoparmelia)(?) on a limestone rock in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
A garden of Fall River Historical Society during blizzard, view from Rock Street. Fall River, Massachusetts, January 23, 2005.
Dumpling Rocks, or "House on the Rocks" and Newport Bridge in East Passage of Narragansett Bay, view from a ferry. Rhode Island, September 5, 2004
Early snowfall on Rock Street near Museum of Fall River Historical Society in historic Highlands District. Fall River, Massachusetts, November 13, 2004
Rocks east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Weathering of rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Lichens on rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Boot Rock, view from Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
Pomham Light and Rocks in Providence River, view from East Bay Bike Path. Providence, Rhode Island, March 7, 2004
Pomham Light and Rocks in Providence River, view from a private apartment complex. Providence, Rhode Island, March 7, 2004
Pomham Rocks Light in Providence River, view from East Bay Bike Path. Providence, Rhode Island, October 14, 2004
Pomham Rocks Light in Providence River, view from a lookout in an apartment complex. Providence, Rhode Island, October 14, 2004
Limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
View of Longfellow Bridge across Charles River from Hancock Tower in Boston. Massachusetts, August 3, 1999.
View of Back Bay, Charles River and Cambridge from Hancock Tower in Boston. Massachusetts, August 3, 1999.
View of Charles River and downtown Boston from the top of Bunker Hill Monument. Massachusetts, July 31, 1999.
Limestone rocks on a beach in Abu Samra, near Salwa Road. Qatar, October 16, 2015
Weathered limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
Broken limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
Erosion of limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
Elephant Tusk Rock, view from Fresno Spring near Dodson Trail. Big Bend National Park, Texas, November 24, 2007
Rocks on a slope of Freshman Mountain east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Limestone with fossils near Whiskey Bridge of Brazos River, on Highway 21 west from Bryan. Texas, November 29, 2019
Rough weathered limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
Rough eroded limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
Museum of S. I. Vavilov State Optical Institute with an old artistically decorated chimney and a Soviet-era exposition. (the room has reach interior because the building was expropriated from a wealthy family after the Great October Socialist Revolution). Vasilyevsky Island, Saint Petersburg, Russia, April 14, 1999.
View of Longfellow Bridge across Charles River and Cambridge Pkwy. from Hancock Tower in Boston. Massachusetts, August 3, 1999.
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, May 14, 2004
A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, May 14, 2004
Overhanging limestone rocks in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, June 25, 2016
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