Fossilized Sea Urchin (Echinoid)
Echinoidea (Class) - likely replaced by Calcite or Quartz
sedimentary
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
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Brown Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Fossil in Limestone
Crinoidea fossil (stalk segments) in Calcium Carbonate (CaCO3) matrix
sedimentary
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Siltstone-Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Sandstone (SiO2 with FeO(OH) cementing)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
sedimentary
Sandstone (Quartz-rich)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Red Sandstone
Sedimentary Arenite / Quartzose Sandstone
sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Stromatolite
Biogenic sedimentary structure (Stromatolite)
fossil
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Red Sandstone
Sedimentary Litharenite / Quartz Arenite
sedimentary
River Cobble (Quartzite / Sandstone)
Quartzite / Siliciclastic Sedimentary Rock
sedimentary
Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)
Biogenic Sedimentary Rock (CaCO3)
fossil
Pea Gravel / River Gravel
Unconsolidated Clastic Sedimentary Aggregate
sedimentary
Coal (Bituminous / Anthracite)
Carbonaceous Sedimentary Rock (C)
sedimentary
Conglomerate
Conglomerate rock (detrital sedimentary)
sedimentary
Conglomerate
Clastic Sedimentary Rock (Puddingstone)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Limestone with Fossil Inclusions
Sedimentary Carbonate Rock (CaCO3)
sedimentary
Limestone with Iron Oxide Staining
Sedimentary Rock (Calcite, CaCO3)
sedimentary
Flint nodule
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Flint Pebble
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Chert
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Limestone (Weathered / Limonite-stained)
Sedimentary carbonate rock (CaCO3)
sedimentary
Flint
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Wishing Stone with Quartz Vein
Quartz-veined sedimentary pebble
sedimentary
Limestone
Sedimentary carbonate rock (CaCO3)
sedimentary
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Flint
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary