The marble tombstone with a cavity on the northern side of the Chapel of the Sepulchre in the Church of the Sepulchre in Old City. Jerusalem, the Middle East, June 28, 2001
Firedot lichen Caloplaca subsoluta (Caloplaca irrubescens) on a granite tombstone in old Port Sullivan cemetery, west from Hearne. Texas, January 8, 2019
Old marble tombstone in Odd Fellow Cemetery. Anderson, Texas, December 31, 2009
A tombstone of Samuel Sparhawk (1664 - 11/2/1713) in Old Burying Ground of Harvard University. Boston, Massachusetts, April 19, 2003
Detail of a tombstone of Old Burying Ground of Harvard University in Cambridge. Boston, Massachusetts, April 19, 2003
Lane paved by old tombstones in Volkovo Cemetery. Saint Petersburg, Russia, September 4, 2007
Tombstone of Asa Chaddick (9/2/1815 - 6/12/1898) in Old Oakland Cemetery at Road 219. Roans Prairie, Texas, January 26, 2008
Old tombstones in Volkovo Cemetery. Saint Petersburg, Russia, September 4, 2007
Old tombstones of Oakwood Cemetery in fog. Huntsville, Texas, December 29, 2011
Old tombstones on First Lane in Smolenskoe Cemetery. Saint Petersburg, Russia, March 12, 2017
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 tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Rosy saucer lichen (Ochrolechia trochophora) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Rosy saucer lichen (Ochrolechia trochophora) on upper edge of an old tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Spotted rosette lichen (Physcia pumilior(?)) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Brown apothecia of spotted rosette lichen (Physcia pumilior(?)) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Greenish buttoned rosette lichen (Pyxine) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Greenish buttoned rosette lichen (Pyxine) with soredia on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Buttoned rosette lichen (Pyxine) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Buttoned rosette lichen (Pyxine) with soredia on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Button lichen (Buellia) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Rosy saucer lichen (Ochrolechia trochophora) with apothecia on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Spotted rosette lichen (Physcia pumilior(?)) with brown apothecia on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Pepper-spore lichen (Rinodina) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Rosette lichen (Physcia) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Perforated ruffle lichen (Parmotrema perforatum) on a granite tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Peppered rock-shield lichen (Xanthoparmelia conspersa) on a granite tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
Old tombstones in Washington Cemetery. Washington, Texas, December 8, 2019
