Limestone
Calcium Carbonate (CaCO3)
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Limestone
Calcite-rich sedimentary rock (CaCO3)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite/Quartz Arenite
sedimentary
Sandstone (with Iron Staining)
Arenite (SiO2 predominantly)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
mineral
Petrified Wood
Silicified wood (primarily Quartz/Chalcedony, SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Oyster (Gryphaea or Exogyra)
Crassostrea / Gryphaea (Bivalvia)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Petrified Wood / Red Jasper
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Turritella Agate
Silicified Elimia tenera Fossil (SiO2)
sedimentary
Ironstone Concretion (Siderite Nodules)
Siderite (FeCO3) in Mudstone or Sandstone matrix
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Coquina / Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Fossiliferous Limestone with Brachiopod shell
Calcium carbonate (CaCO3)
sedimentary
Fossilized Blastoid
Pentremites (Class Blastoidea)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (containing bioclasts)
sedimentary
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Turritella Agate (Calligrapher Stone)
Silicified Elimia tenera (Chalcedony/Quartz)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Dendritic Siltstone
Siltstone with Manganese Dendrites (MnO2)
sedimentary
Crinoid Fossil in Limestone
Class Crinoidea in Carbonate Matrix (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (with vugs)
Arenite / Sedimentary Sandstone
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Fossiliferous Limestone (Coquina / Shell Conglomerate)
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary