 Green and red clay layers in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Orange and red clay layers in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Brittlestem mushrooms Psathyrella clivensis(?) at the bottom of Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Brown brittlestem mushrooms Psathyrella clivensis(?) at the bottom of Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Flowers of marsh marigold (kingcup, Caltha palustris, Russian name Kaluzhnitsa) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Alternate-leaved Golden Saxifrage (Chrysosplenium alternifolium, Russian name Selezionochnik) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Back lit Alternate-leaved Golden Saxifrage (Chrysosplenium alternifolium, Russian name Selezionochnik) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Close up of Alternate-leaved Golden Saxifrage (Chrysosplenium alternifolium, Russian name Selezionochnik) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Black hoverfly Cheilosia on a yellow flower of Lesser celandine (Ranunculus ficaria, Russian name Chistyak) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Yellow flower of marsh marigold (kingcup, Caltha palustris, Russian name Kaluzhnitsa) with a black hoverfly Cheilosia in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Black hoverfly Cheilosia on a yellow flower of marsh marigold (kingcup, Caltha palustris, Russian name Kaluzhnitsa) in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Valley of Popovka River near Grafskaya Road in area of Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Canyon of Tosna River near Sablino, south from Saint Petersburg. Russia, May 21, 2011
 An oak near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Oak tree near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 End of World Pillar from Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Slavianka River near Black Bridge in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Viskontiev Bridge and Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Oak tree in Valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Krasnaya Dolina (Red Valley) near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Slavianka River near Novaya Sylvia Bridge in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Valley of Slavianka River near Pilbashenny Bridge in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Valley of Slavianka River near Novaya Sylvia Bridge in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Valley of Slavianka River from observation site of Novaya Sylvia in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 South corner of Rozovopavilionny Pond in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 Multicolored saxicolous crustose lichens on a granite rock near the lake near old army bathhouse south from Mys Moryin Nos near Ladoga Lake, east from Saint Petersburg. Russia, May 14, 2019
 Multicolored layers of wadi Ardon in Ramon Crater. The Middle East, May 9, 2002
 View of multicolored rock layers from Mount Tzefahot near Eilat. The Middle East, May 13, 2000
 Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Slavianka River in Pavlovsk Park. South from Saint Petersburg, Russia, July 21, 2012
 Slavyanka River near Pil Tower in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Meadows along Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Meadows along Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Area near Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Banks of Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Exposed clay layers on limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Petrified wood logs in layers of clay on a shore of Lake Somerville, north from Big Creek Park. Texas, January 17, 2009
 Slavianka River and Pil Tower in Pavlovsk Park. South from Saint Petersburg, Russia, July 21, 2012
 Slavyanka River from Novosilviyskiy Bridge in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Viskontiev Bridge of Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Round Pond of Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Slavyanka River near Tiarlevo from Novosilviyskiy Bridge in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Novosilviysky stone bridge of Slavianka River in Pavlovsk Park, south from Saint Petersburg. Russia, June 23, 2010
 Stone ruins near Slavianka River in Pavlovsk Park near Tiarlevo. South from Saint Petersburg, Russia, July 21, 2012
 Slavianka River and Khram Druzhby (Friendship Temple) in Pavlovsk Park, south from Saint Petersburg, Russia, June 23, 2010
 Layers of clay and gravel on a shore of the lake in Birch Creek Unit of Lake Somerville State Park, Texas, October 26, 2024
 Rusty silt and clay layers on a shore of the lake in Birch Creek Unit of Lake Somerville State Park, Texas, October 26, 2024
 Oak near Slavianka River in fog in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Road along Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
 View across Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 23, 2021
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Oak near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, August 20, 2018
 Slavianka River in fog in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Area of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Forest near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Willow near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Valley of Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Oak near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 21, 2017
 Valley of Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 12, 2021
 View of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Trees across Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Trees near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Meadow near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, August 29, 2007
 Trail along Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 11, 2009
 Lookout over Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, October 4, 2016
 Slavianka River and Pil Tower in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 11, 2009
 Forest near Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 11, 2009
 Slope of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Kuzminka River and Friendship Temple in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 10, 2017
 Banks of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 11, 2009
 Air bubbles and pollen Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Oaks near Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, July 31, 2024
 Forest near Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 26, 2016
 Valley of Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, October 14, 2016
 Pil Tower at Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
 Ice fishing on Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Forest near Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, October 14, 2016
 Slavianka River and Pil Tower in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, August 29, 2007
 Slavianka River in New Sylvia in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, December 28, 2014
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Temple of Friendship across Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 23, 2021
 Slavyanka River from Novosylviysky Bridge in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 12, 2021
 Viskontiev Bridge of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Viskontiev Pond of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Slavianka River near Friendship Temple in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Pil Basnia Bridge of Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Slavyanka River from Pilbashennaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Novosylviyskiy Bridge of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Birches near Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 15, 2016
 Slavyanka River near Okruzhnaya Alleya in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 12, 2021
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