Organic Specimen (Fossil)

Sandstone (with Arkose characteristics)

Clastic sedimentary rock (SiO2 with KAlSi3O8)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)

Sandstone Pebbles

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone

Arenite

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)

Vesicular volcanic rock, likely pumice or scoria

Vesicular rhyolitic–andesitic volcanic rock; predominantly silicate glass with feldspar and possibly pyroxene

Sandstone

Arenite (primarily SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Sandstone with Manganese Dendrites

Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)

Ironstone Concretion / Limonite-stained Siltstone

Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)

Sandstone (likely Arkose or Lithic)

Clastic sedimentary rock (primarily SiO2)

Sandstone (River Cobble)

Clastic Sedimentary Rock (primarily Quartz with Feldspar)

Limestone (specifically Grainstone or Micrite)

Calcium Carbonate (CaCO3)

Fossil Coral

Hexagonaria / Rugose coral (Fossilized calcium carbonate)

Fossil Shark Tooth

Carcharocles or Lamniformes (order)

Megalodon Shark Tooth

Otodus megalodon

Crinoid Stem Fossil

Crinoid (Class Crinoidea)

Coquina / Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate - CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone with Iron Staining

Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))

Sandstone (likely Arkosic or Lithic Sandstone)

Arenite (composed primarily of SiO2 with various lithic fragments)

Red Shale

Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (specifically Red Sandstone)

Arenite (primarily Quartz, SiO2)

Shale

Fissile Mudstone

Sandstone

Arenite (clastic sedimentary rock)

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Limestone

Calcium Carbonate (CaCO3)

Ferruginous Sandstone (Ironstone)

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Shale

Lutaceous Sedimentary Rock

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Coral Fossil (Petoskey-style or Colonial)

Hexagonaria percarinata (Order: Rugosa)

Limestone

Calcium Carbonate (CaCO3)

Iron Concretion

Ferruginous concretion (Fe2O3·nH2O / FeO(OH))

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Sandstone

Arenite (SiO2 primarily)