RMECHCED–Sandstone concretions comprise Rock City, near Minneapolis, Kansas, USA
RMBG8GR3–Calcium carbonate concretions at the Hierve el Agua site (Oaxaca - Mexico). Concrétions de carbonate de calcium à Hierve el Agua
RMRFYC1Y–Geological concretions, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
RF2JH464W–Cannonball concretions, North Dakota
RME6WWEF–Moeraki Boulders, spherical concretions, stone ball, South Island, New Zealand
RMJRXY5T–Cannon Ball rocks or concretions of limestone, Roker, Sunderland, north east England, UK
RMHCG24D–Welded Tuff With Silica Concretions, Cwm Idwal, Glyderau Mountains, Snowdonia, Wales, UK
RMH6HYW3–Cannonball concretions, North Unit, Theodore Roosevelt National Park, North Dakota.
RF2C86CN5–Salt concretions on the shore of the Dead Sea in Jordan
RMFEECK1–The concretions known as the Moeraki Boulders, exposed at low tide on the beach - Moeraki, Otago, New Zealand.
RMM92D15–Sandstone concretions at the Bay of Laig on the Isle of Eigg, Inner Hebrides, Scotland. The mountains in the distance are on the Isle of Rum.
RMC02W0J–Cannonball concretions on an Oregon coast beach
RMF96CCY–Concretions, Kettle Point, Ontario, Canada
RMD4C8JT–Large sandstone concretions, Red Rock Coulee Natural Area, Alberta, Canada
RF2RH2G11–Fascinating formations known as cannonball concretions in Theodore Roosevelt National Park’s North Unit
RFH5D442–Cannon Ball Concretions, Theodore Roosevelt National Park, North Unit, North Dakota.
RM2M6E4F8–Salt concretions in the salt plains in the Danakil Depression in Ethiopia.
RFCMY357–Concretions on Koutu Beach at Hokianga Harbour, Northland, in the North Island of New Zealand
RM2AE7A1F–Stalactites and calcite concretions in the prehistoric caves of Cougnac near Gourdon-en-Quercy, Lot, France
RMECHCEN–Huge sandstone concretions comprise Rock City, near Minneapolis, Kansas, USA
RMCPXTW4–France, Dordogne, Perigord Vert, Villars, concretions in the caves
RMRFYC47–Geological concretions, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
RF2HJ0WWB–The Cannonball Concretions in the Theodore Roosevelt National Park
RME6WWEK–Moeraki Boulders, spherical concretions, stone ball, Otago, South Island, New Zealand
RMJRXY4H–Cannon Ball rocks or concretions of limestone, Roker, Sunderland, north east England, UK
RFR80P5F–Concretions in Sand
RMH6HYXA–Cannonball concretions, North Unit, Theodore Roosevelt National Park, North Dakota.
RMPCJTCM–Concretions on Laig shore, Isle of Eigg
RMFEEB40–The concretions known as the Moeraki Boulders, exposed at low tide on the beach - Moeraki, Otago, New Zealand.
RMM92D1R–Sandstone concretions at the Bay of Laig on the Isle of Eigg, Inner Hebrides, Scotland. The mountains in the distance are on the Isle of Rum.
RMC02TKA–Cannonball concretions on an Oregon coast beach
RF2RW2TXJ–Concretions, Rock City, Ottawa County, Kansas
RMM6CFBT–Large sandstone concretions, Red Rock Coulee Natural Area, Alberta, Canada
RF2RH2G0T–Fascinating formations known as cannonball concretions in Theodore Roosevelt National Park’s North Unit
RFH5D414–Cannon Ball Concretions, Theodore Roosevelt National Park, North Unit, North Dakota.
RM2M6DX0B–Salt concretions on the extraction pump in the salt plains in the Danakil Depression, Ethiopia.
RFCMY14A–Concretions on Koutu Beach at Hokianga Harbour, Northland, in the North Island of New Zealand
RF2CFH7WE–Cannonball concretions, Roosevelt National Park, North Unit
RF2HKE875–Concretions weathered out of Cretaceous deposits litter the ground.
RME1TGHR–Sandstone concretions in Red Rock Coulee Natural Area, Alberta, Canada
RMRFYC25–Geological concretions, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
RF2HJ0X4M–The Cannonball Concretions in the Theodore Roosevelt National Park
RME6WWDG–Moeraki Boulders, large, spherical concretions, stone ball, Otago, South Island, New Zealand
RMW20M11–Twilight Wash on Submerged Concretions, Bowling Ball Beach, Mendocino County, California, USA
RFR7YB9B–Large Boulders of concretions, Valley of Fire, Nevada
RMH6J00G–Cannonball concretions, North Unit, Theodore Roosevelt National Park, North Dakota.
RMFXX72P–Plinthite, formed from coalescence and hardening of iron concretions in the Apure savanna of Venezuela, South America
RMFEEB61–The concretions known as the Moeraki Boulders, exposed at low tide on the beach - Moeraki, Otago, New Zealand.
RM2BAYFAR–Geological calcite concretions known as the Moeraki Boulders, on Koekohe Beach, Otago coastline in New Zealand.
RMC02TAD–Cannonball concretions on an Oregon coast beach
RF2BD4679–Concretions, Rock City, Ottawa County, Kansas
RMG1YXGT–Large sandstone concretions, Red Rock Coulee Natural Area, Alberta, Canada
RF2RH2G0W–Fascinating formations known as cannonball concretions in Theodore Roosevelt National Park’s North Unit
RFH5D42C–Cannon Ball Concretions, Theodore Roosevelt National Park, North Unit, North Dakota.
RM2M6DWTD–Salt concretions on the extraction pump in the salt plains in the Danakil Depression in Ethiopia.
RFCMY173–Moeraki Boulders, Otago, New Zealand, low tide. Focus on foreground.
RF2CFH7PH–Cannonball concretions, Roosevelt National Park, North Unit
RF2HKE829–Concretions weathered out of Cretaceous deposits litter the ground.
RME1TGHT–Sandstone concretions in Red Rock Coulee Natural Area, Alberta, Canada
RMRFYC3E–Geological concretions, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
RF2HJ0XAW–The Cannonball Concretions in the Theodore Roosevelt National Park
RMEFHTN1–Moeraki Boulders, large, spherical concretions on the beach, stone ball, Moeraki, Otago, South Island, New Zealand
RFMKBPC4–Calcite concretions in clay-septaria,Southern Ural. The oldest remains of the seabed interspersed with remnants of molluscs and minerals
RF2NJX7BP–Landscape view of famous Garm Chashma thermal hot springs calcareous concretions in Pamir mountains, Gorno-Badakshan, Tajikistan
RMH6HYX1–Cannonball concretions, North Unit, Theodore Roosevelt National Park, North Dakota.
RFEFW845–Three spherical sandstone concretions at Red Rock Coulee Provincial Park, near Medicine Hat, in southern Alberta, Canada.
RMFEEAHH–The concretions known as the Moeraki Boulders, exposed at low tide on the beach - Moeraki, Otago, New Zealand.
RM2DWPTN1–Geological calcite concretions known as the Moeraki Boulders, on Koekohe Beach, Otago coastline in New Zealand.
RMC02X5X–Cannonball concretions on an Oregon coast beach
RF2BD4678–Concretions, Rock City, Ottawa County, Kansas
RM2A9HJGX–Large sandstone concretions, Red Rock Coulee Natural Area, Alberta, Canada
RF2RH2FX2–Fascinating formations known as cannonball concretions in Theodore Roosevelt National Park’s North Unit
RFH5D43F–Cannon Ball Concretions, Theodore Roosevelt National Park, North Unit, North Dakota.
RM2MC29NJ–Honeycomb weathering and concretions on the sandstone at Shore Acres State Park on the Oregon Coast, USA
RM2T6XTE8–Travenanzes dolls (calcareous concretions), Visitor Centre of the Fanes-Senes-Braies Natural Park, San Vigilio di Marebbe, Trentino-Alto Adige, Italy
RF2CFH7T2–Cannonball concretions, Roosevelt National Park, North Unit
RM2M784TD–Gogotte - sanstone concretion, Oligocene, Fontainebleau, France
RME1TGHP–Sandstone concretions in Red Rock Coulee Natural Area, Alberta, Canada
RMRFYC2R–Geological concretions, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
RMCREHTF–The Moeraki Boulders, South Island of New Zealand 7
RFPREFTF–The famous Moeraki Boulders, an icon of New Zealand, in Otago, at sunrise.
RM2GG8HKB–Rock concretions, at Shore Acres State Park on the coast of Oregon at Coos Bay.
RMHRW8XF–Cannon Ball Concretions, Theodore Roosevelt National Park, ND, USA
RMH6J00C–Cannonball concretions, North Unit, Theodore Roosevelt National Park, North Dakota.
RM2WDA7GG–Moki marbles at Snow Canyon State Park, Utah
RMFECX4M–The concretions known as the Moeraki Boulders, exposed at low tide on the beach - Moeraki, Otago, New Zealand.
RM2E14NEF–Geological calcite concretions known as the Moeraki Boulders, on Koekohe Beach, Otago coastline in New Zealand.
RMC02WTY–Cannonball concretions on an Oregon coast beach
RFR9KC7C–Medical illustration of the most frequent painful points in the various forms of calculosis
RMF7M9GG–Large sandstone concretions, Red Rock Coulee Natural Area, Alberta, Canada
RF2RH2FX0–Fascinating formations known as cannonball concretions in Theodore Roosevelt National Park’s North Unit
RFH5D41T–Cannon Ball Concretions, Theodore Roosevelt National Park, North Unit, North Dakota.
RMCB8DH8–Moeraki Boulders, Moeraki Beach, East Coast, Ortago, South Island, New Zealand
RFEJJF3W–Encrustation of the sea. Texture of old marine life forms
RF2CFH7NG–Cannonball concretions, Roosevelt National Park, North Unit
RMMEGH1C–Septarian Concretion Nodule
RME1TGJ7–Sandstone concretions in Red Rock Coulee Natural Area, Alberta, Canada
RMRFYC22–Geological concretions with a mans hand for scale, Moenkopi Dinosaur Tracks site near Tuba City, Arizona, United States.
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