Unclassified
Ooid
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Unclassified
Ooid
Small sedimentary grain that forms on shallow tropical seabeds
rare · Q642735
Related cards · rock material
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Unclassified
Rock (geology)
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Unclassified
Pumice
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Unclassified
Sand
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Unclassified
Tephra
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Iconic places
Scree
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Unclassified
Gravel
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Related cards · granular material
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Concepts
Beryllium
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Concepts
Molybdenum
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Unclassified
Cement
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Concepts
Rhodium
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Concepts
Hafnium
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Meta topics
Oil sands
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Related cards · natural material
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Unclassified
Brownstone
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Nature
Ivory
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Unclassified
Gravel
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Unclassified
Cobblestone
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Dark history
Derna dam collapses
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Unclassified
Greywacke
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