Limonite Concretion
FeO(OH)·nH2O (Hydrated Iron Oxide)
Category
Browse sedimentary (fossiliferous) specimens identified by the Rock Identifier community.
Limonite Concretion
FeO(OH)·nH2O (Hydrated Iron Oxide)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (SiO2 dominated)
Sandstone Pebble
Arenite (SiO2 dominated)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Sandstone
Sandstone (SiO2-rich detrital sedimentary rock)
Sandstone
Arenite
Belemnoidea (Belemnite) Fossil
Belemnoidea (order), typically within the genus Belemnitida
Sandstone
Arenite (SiO2 based typically)
Chert
Microcrystalline Quartz (SiO2)
Brown Sandstone Pebble
Clastic Sandstone (SiO2 with iron oxides)
Sandstone Pebble
Arenite (SiO2 based)
Sandstone
Arenite
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed mostly of SiO2)
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)
Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
Sandstone (likely Arkose)
Arenite (Feldspathic Sandstone / Arkose)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (with Quartz Vein/Inclusion)
Arenite (primarily SiO2)
Glauconitic Sandstone
Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2
Sandstone (Quartzose Sandstone)
Clastic Terrigenous Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (with iron oxide cement)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide inclusions)
Limestone
Calcium carbonate (CaCO3)
Sandstone (Quartz-rich)
Arenite
Limestone Gravel
Calcium Carbonate (CaCO3)
Sandstone
Arenite (predominantly SiO2)
Chert (Flint) with Limestone Matrix
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based with mineral cement)
Glauconitic Sandstone
Glauconitic arenite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)
Sandstone (Water-worn)
Arenite
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based)