Peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tomb in City Cemetery. Bryan, Texas, December 8, 2018
Mexican yolk lichen (Candelina submexicana) together with granite rosette lichen (Physcia halei) at the edge of a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Exfoliation of granite slabs from the dome of Enchanted Rock, view from Freshman Mountain. Enchanted Rock State Natural Area, Fredericksburg, Texas, December 25, 2018
View of the granite dome from Echo Canyon. Enchanted Rock State Natural Area, Fredericksburg, Texas, December 25, 2018
Granite rocks in Gulf of Finland in Alexandria Park in Peterhof, west from Saint Petersburg. Russia, June 6, 2011
Eroded granite rock formations. Independence Rock west from Casper, Wyoming, July 22, 2010
Leather lichen Dermatocarpon luridum on dark brown water lichen Pyrenopsis in water seepage area on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Cracked lichen Acarospora novomexicana (yellow) and firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) (red) on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Granite rocks beside Monastyrsky Island, on Valaam Island. Karelia Region, Russia, July 23, 2015
Exfoliation (onion skin weathering of granite) of Enchanted Rock. Fredericksburg, Texas, October 27, 2007
Rock-shield lichen (Xanthoparmelia) on a granite tombstone in City Cemetery. Bryan, Texas, December 8, 2018
Lichens covering granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Orange firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Firedot lichen Fulgogasparrea brouardii (Caloplaca brouardii)(?) on granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Red firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Exfoliation of granites of Enchanted Rock, view from Turkey Pass Trail. Fredericksburg, Texas, October 27, 2007
Slender rosette lichen (Physcia subtilis) on a granite surface in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Dry flakes of leather lichen (Dermatocarpon) on a horizontal granite surface in shade in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Rock-shield lichen (Xanthoparmelia) on cracked pink granite of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Moonglow lichen (Dimelaena oreina)(?) on pink granite of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Large granite stone covered by cracked lichen Acarospora novomexicana (yellow) and firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) (red) on Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Granite rocks in a forest east from Leypyasuo. North from Saint Petersburg, Russia, June 7, 2014
Firedot lichen Caloplaca on granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Standing on a granite dome of Enchanted Rock in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Peppered rock-shield lichen (Xanthoparmelia conspersa) with millipeds on a granite tomb in City Cemetery. Bryan, Texas, December 8, 2018
Various lichens on a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Dark brown crustose lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Dark brown crustose lichen Caloplaca on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Common grey crustose lichen Aspicilia (sunken disk lichen) on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Cobblestone, or cracked lichen Acarospora (yellow, dispersed) on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Grey crustose lichen Aspicilia with firedot lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Grey crustose lichen Aspicilia with orange firedot lichen Caloplaca on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Brown lichen Caloplaca with other crustose lichens on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Yellow cobblestone lichen Acarospora socialis and brown Caloplaca on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Isidious lichen Fulgogasparrea brouardii (Caloplaca brouardii)(?) on a granite stone in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Leather lichen Dermatocarpon luridum (brownish foliose) on black granular lichen Pyrenopsis in seepage area on horizontal granite surface in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Leather lichen Dermatocarpon luridum with water-crust lichen Pyrenopsis in water seepage area on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Close up of leather lichen Dermatocarpon luridum in water seepage area on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Orange and dark brown crustose lichens Caloplaca on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Dry leather lichen (Dermatocarpon) on a horizontal granite surface in shade in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Gold cobblestone lichen Pleopsidium flavum (Pleopsidium oxytonum)(?) mixed with a grey crustose lichen on granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Mexican yolk lichen (Candelina submexicana) on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Narrow lobes of granite rosette lichen (Physcia halei) in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Flakes of leather lichen (Dermatocarpon) on a horizontal granite surface in shade in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Masses of flakes of leather lichen (Dermatocarpon) on a horizontal granite surface in a shade of big rocks in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Yellow cobblestone lichen Acarospora socialis on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Tiny yellow flower of aster family on pink granite in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Large slabs of granite at the base of the dome of Enchanted Rock, view from Freshman Mountain. Enchanted Rock State Natural Area, Fredericksburg, Texas, December 25, 2018
Cracked lichen Acarospora novomexicana (yellow) and firedot lichen Fulgogasparrea appressa (Caloplaca appressa)(?) (red) on pink granite of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
Apothecia of peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tomb in Odd Fellow Cemetery. Anderson, Texas, December 31, 2018
Peppered rock-shield lichen (Xanthoparmelia conspersa) growing around inscription on a granite tomb of C. M. Womack (5/24/1862) in Odd Fellow Cemetery. Anderson, Texas, December 31, 2018
Large apothecia of peppered rock-shield lichen (Xanthoparmelia conspersa) on surface of a granite tomb in Odd Fellow Cemetery. Anderson, Texas, December 31, 2018
Rock shield lichen (Xanthoparmelia) on a granite tombstone in old Port Sullivan cemetery, west from Hearne. Texas, January 8, 2019
Close up of rock shield lichen (Xanthoparmelia) on a granite tombstone in old Port Sullivan cemetery, west from Hearne. Texas, January 8, 2019
Peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tombstone in City Cemetery. Bryan, Texas, March 3, 2019
Texture of peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tomb in City Cemetery. Bryan, Texas, March 3, 2019
Various grey 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
Texture of various grey 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
Various grey and brown 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
Granite rocks on extremety in Gulf of Finland in Tarkhovka near Sestroretsk. West from Saint Petersburg, Russia, August 18, 2018
Peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Pattern of peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tomb in City Cemetery. Bryan, Texas, March 3, 2019
Apothecia of peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tomb in City Cemetery. Bryan, Texas, March 3, 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
Rock foam lichen (Stereocaulon saxatile)(?) on a rough surface of a granite stone in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Rock foam lichen (Stereocaulon saxatile) with other lichens on a large granite stone in a forest in Kannelyarvi, 45 miles north from Saint Petersburg. Russia, May 25, 2019
Granite rocks and a boat in Vyborg Bay from Gvardeysky Island. Vyborg, Russia, July 20, 2024
Rock shield lichen (Xanthoparmelia) on a granite boulder on shore of Gvardeysky Island. Vyborg, Russia, July 20, 2024
Grey lichen on a granite stone in Paltsevo Rock Massif near Svetogorsk Highway near Vyborg. Russia, July 20, 2024
View towards Repino from the Laskovy Beach area in Solnechnoe highlighting a transition in the coastal landscape of the Gulf of Finland, marked by rugged natural textures and distinct geological features typical of the Karelian Isthmus shoreline. Unlike the wide, smooth sandy expanses of the main Laskovy Beach, the stretch towards Repino is characterized by a "stony belt" of glacial boulders and pebbles. The rocks visible in the shallow water and on the sand--primarily rapakivi granite and gneiss--are glacial erratics left behind by retreating ice sheets. Their reddish and grey hues (wet from the waves) contrast sharply with the rust-colored sand. Several hooded crows (Corvus cornix) are visible foraging along the shoreline. Saint Petersburg, Russia, October 9, 2025
Devil s Bridge (Chertov Most), also known as the Cascade, located near the Upper Ponds in Catherine Park. It is constructed from rough-hewn limestone and granite blocks (tufa) to resemble a natural rock formation or an ancient grotto. The "bridge" actually functions as a decorative cascade or dam between the ponds. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, October 10, 2025
