RMBY0J7Y–'Moqui marbles' - Hematite concretions from the Navajo sandstone of southeast Utah
RF2A3JWY7–Hematite concretions and Moqui marbles, an unusual rock formation in Grand Staircase Escalente National Monument
RMW0N5P0–The small spherules on the Martian surface in this close-up image are near Fram Crater, visited by NASA's Mars Exploration Rover Opportunity during the 84th Martian day, or sol, of the rover's work on Mars (April 19, 2004). The area shown is 1.2 inches (3 centimeters) across. These are examples of the mineral concretions nicknamed 'blueberries.' Opportunity's investigation of the hematite-rich concretions during the rover's three-month prime mission in early 2004 provided evidence of a watery ancient environment. NASA announced on February 13, 2019, that one of the most successful and enduring
RF2E4FXF3–Moqui Marbles at White Pocket, Vermilion Cliffs National Monument, Arizona, USA
RFRHDKNT–Moki moqui marbls at Spencer Flat, Utah
RMD0EK5P–Hematite or Iron Stone Concretions on Bed of Navajo Sandstone
RFRYJ6XA–Bog iron is a form of impure iron deposit that develops in bogs or swamps. The dominant source of iron ore in Scandinavia and Russia into the Middle
RF2A3JX01–Hematite concretions and Moqui marbles, an unusual rock formation in Grand Staircase Escalente National Monument
RF2E4G5BF–Embedded Moqui Marbles, showing the structure with an iron oxide rim, at White Pocket, Vermilion Cliffs National Monument, Arizona, USA
RFRHDKP4–Moqui marbls at Spencer Flat, Utah
RFRWRW53–Bog iron is a form of impure iron deposit that develops in bogs or swamps. The dominant source of iron ore in Scandinavia and Russia into the Middle
RF2A3JP2E–Hematite concretions and Moqui marbles, an unusual rock formation in Grand Staircase Escalente National Monument
RF2E4G5P0–Embedded Moqui Marbles, showing the structure with an iron oxide rim, at White Pocket, Vermilion Cliffs National Monument, Arizona, USA
RFRHDKT3–Moqui marbls at Spencer Flat, Utah
RF2HX7HRD–Bog iron is a form of impure iron deposit that develops in bogs or swamps. The dominant source of iron ore in Scandinavia and Russia into the Middle
RF2A3JWYB–Hematite concretions and Moqui marbles, an unusual rock formation in Grand Staircase Escalente National Monument
RFRHDKW6–Moqui marbls at Spencer Flat, Utah
RF2A3JWYM–Hematite concretions and Moqui marbles, an unusual rock formation in Grand Staircase Escalente National Monument
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