 QNHG (Qatar Natural History Group) exploring fossils in limestone layer (Dukhan Limestone Member) of Dammam Formation in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Grassy field near Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Camelthorn bush (Alhagi maurorum) in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Camelthorn bush (Alhagi maurorum) with fresh leaves in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Aerva javanica (local names towayim, tarfa, tirf, Tuwaim) in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Dry eyelash plant (Blepharis ciliaris, local names nejayae, shouk al dab) in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Compact claystone (Midra Shale) at the base of Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 Fossil shark tooth (Galeocerdo(?)) embedded in a rock of Dammam Formation (Lower Dam limestones) in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 Large gastropod fossil (sea snail, marine mollusk) Ampullina sp. (Ampullospira) of Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 QNHG (Qatar Natural History Group) exploring fossils of the Middle Eocene Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 QNHG (Qatar Natural History Group) looking for fossils in Midra Shale of the Middle Eocene Dammam Formation in a site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 QNHG (Qatar Natural History Group) exploring compact claystone (Midra Shale) of the Middle Eocene Dammam Formation at fossil site on flanks of Rawdat Al Heshaimiya(?) depression south from Trainah. Southern Qatar, November 6, 2015
 Limestone mushroom formation in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 A.S. near limestone mushroom formation in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Limestone mushroom formation in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Fossilized oyster shells in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
 Fossilized oyster shells on the ground in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
 Masses of fossilized oyster shells on the ground in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 29, 2016
 Overhanging limestone formation in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Limestone rock formation in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Orange limestone formation in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Texture of an orange limestone formation in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Erosion of an orange limestone formation in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Exposed fossilized roots(?) on limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Layer of fossilized sea shells in sandstone near Whiskey Bridge of Brazos River, on Highway 21 west from Bryan. Texas, November 29, 2019
 Layer of fossilized sea shells in red sandstone near Whiskey Bridge of Brazos River, on Highway 21 west from Bryan. Texas, November 29, 2019
 Limestone formation on a plateau of a tabletop mountain in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Pink and green clay layer of limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Orange limestone formation on a plateau of a tabletop mountain in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Erosion of a limestone formation on a plateau of a tabletop mountain in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Layer of fossilized sea shells in a broken piece of sandstone near Whiskey Bridge of Brazos River, on Highway 21 west from Bryan. Texas, November 29, 2019
 Tiny fossilized echinoderm or sea urchin in limestone in coastal area in south-western Qatar, February 7, 2014
 Aeolian abrasion of limestone rocks (carved by drifting sand) in Traina Sinkhole (karst depression) AOI 2 north-west of Khor Al Adaid. Southern Qatar, January 23, 2015
 Stratified layers of limestone and Miocene deposits of the Dam Formation on the slope of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014
 Shells and limestone peaces on north side of Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, December 20, 2015
 Fossilized oyster shells on a beach in western area of Haloul Island (Jazirat Halul). Qatar, April 19, 2013
 Fossilized oyster shells and dead corals on a beach in western area of Haloul Island (Jazirat Halul). Qatar, April 19, 2013
 Limestone arch in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone erosion in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone plateau in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Weathered limestone cliffs in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone on a mountain slope in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Broken limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Erosion of limestone slabs in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Small limestone arch in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Overhanging limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Erosion of soft limestone in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Erosion of limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Weathered limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Rough weathered limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone shelters on a mountain slope in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Cracked limestone on a mountain slope in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Mushroom-shaped limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone mushroom in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Limestone cliffs in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Rough eroded limestone rocks in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Erosion of limestone near Salwa Road in area of Rawdat Ekdaim. Southern Qatar, April 11, 2015
 Limestone cliffs near Salwa Road in area of Rawdat Ekdaim. Southern Qatar, April 11, 2015
 Weathered limestone rocks in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Southern limestone hill on Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, December 20, 2015
 Black flint stones on a limestone plateau in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Small limestone arch on a mountain slope in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Eroded limestone mushroom in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Mushroom shaped limestone cliff in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Foot of limestone cliffs near Salwa Road in area of Rawdat Ekdaim. Southern Qatar, April 11, 2015
 Wind abrasion of limestone cliffs in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Wind abrasion of limestone near Salwa Road in area of Rawdat Ekdaim. Southern Qatar, April 11, 2015
 Limestone plateau in Dukhan in western Qatar, April 9, 2016
 Limestone hill of Jebel Fuwairit. North-eastern Qatar, November 14, 2015
 Texture of limestone hill of Jebel Fuwairit. North-eastern Qatar, November 14, 2015
 Cliffs of limestone hill of Jebel Fuwairit. North-eastern Qatar, November 14, 2015
 Persian Gulf from limestone hill of Jebel Fuwairit. North-eastern Qatar, November 14, 2015
 View from limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 Sandy slope of limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 View from the foot of limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 Sand patterns at the foot of limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 Sandy area at the foot of limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 QNHG (Qatar Natural History Group) gathering in a tea hall in Trainah agricultural settlement. Southern Qatar, November 6, 2015
 Sand texture after a rain at the foot of limestone hill of Jebel Fuwairit at sunrise. North-eastern Qatar, November 14, 2015
 Limestone escarpments near Harrarah in southern Qatar, February 14, 2014
 Limestone arch in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 View from limestone cliffs in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Area of a limestone arch in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Broken limestone in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 View of desert from limestone cliffs in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Limestone hill in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Sandy area near a limestone arch in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Limestone layers in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, June 25, 2016
 Pebbles deposited on the top of limestone cliffs in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Erosion of limestone cliffs in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Grass Pennisetum divisum under limestone cliffs in Harrarah (Al Kharrarah). Southern Qatar, April 23, 2016
 Edge of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Broken limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Vegetation around a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
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