 Orange and red clay layers in Popovka river canyon in Pyazelevo near Pavlovsk, south from Saint Petersburg. Russia, May 10, 2019
 Multicolored 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
 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
 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
 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
 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
 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
 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
 Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 16, 2019
 An oak near 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
 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
 Slavyanka River near Pil Tower 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
 Slavianka River in Pavlovsk Park. South from Saint Petersburg, Russia, July 21, 2012
 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
 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
 Round Pond of Slavyanka River in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Slavyanka River from Novosilviyskiy Bridge in Pavlovsk Park, south from Saint Petersburg. Russia, May 24, 2011
 Slavianka River and Pil Tower in Pavlovsk Park. South from Saint Petersburg, Russia, July 21, 2012
 Viskontiev Bridge 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
 Stone ruins near Slavianka River in Pavlovsk Park near Tiarlevo. South from Saint Petersburg, Russia, July 21, 2012
 Novosilviysky stone bridge of Slavianka River in Pavlovsk Park, south from Saint Petersburg. Russia, June 23, 2010
 Green fruits of baneberry (Actaea Spicata, Russian name Voronets) in Pavlovsk Park. 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
 Alley of Green Woman in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 30, 2014
 Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Trees of Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Green Woman Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
 Green leaves near Angliyskaya Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 30, 2014
 Trees of Green Woman Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, December 28, 2014
 People on Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Oaks of Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Birches near Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 View from Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Oaks of Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Green fern under snow in Old Sylvia in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 Forest near Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Round Hall and Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Snowy Green Woman Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, December 28, 2014
 Trees of Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, December 31, 2015
 East end of Green Woman Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Green meadow in Tiarlevo near Novosilviyskiy Bridge 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, June 21, 2017
 View across Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 23, 2021
 Valley of Slavyanka 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
 Trees near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Valley of Slavyanka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, May 12, 2021
 Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, August 20, 2018
 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 18, 2015
 Trees across Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Willow near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 6, 2016
 Area of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Oak near Slavianka River in fog in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Oak near Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 View of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Slavianka River in fog in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 17, 2013
 Slavianka River in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 2, 2013
 Valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Road along Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Zelionoy Zhenshchiny (Green Woman) Alley in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Snowy trees at Green Woman Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, December 28, 2014
 Zelionoy Zhenshchiny (Green Woman) Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, September 8, 2018
 Green Woman Alley from Staroshaleyny Pond in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 26, 2015
 Spruce trees at Green Woman Alley in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, December 28, 2014
 Friendship Temple near Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Slavianka River near Friendship Temple in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
 Oaks near Slavyanka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Slavyanka River near Tiarlevo in Pavlovsk Park. Pavlovsk, a suburb of Saint Petersburg, Russia, June 14, 2011
 Novosylviyskiy Bridge of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 24, 2017
 Trees in a valley of Slavianka River in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, May 18, 2015
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