Sedimentary (Fossil)

Sandstone with Iron Staining

Arenite (SiO2 based with Fe2O3 staining)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Hag Stone

Perforated Sedimentary Rock

Rugose Coral (Horn Coral)

Order Rugosa (extinct fossilized coral)

Fossilized Coral (Favosites)

Favosites (Extinct Tabulate Coral)

Fossilized Coral (Petoskey Stone or similar Hexagonaria variant)

Hexagonaria percarinata (Fossilized Coral)

Petrified Wood

Silicified Wood (SiO2)

Crinoid Columnal Fossil

Class Crinoidea (Echinodermata); usually calcite replacement (CaCO3)

Fossilized Rugose Coral (Petoskey Stone precursor)

Hexagonaria percarinata (Fossilized Rugose Coral)

Sandstone

Arenite

Sedimentary Rock Fragments

Clastic Sedimentary Rock

Fossil Coral (Favosites)

Favosites sp. (Phylum Cnidaria, Class Anthozoa)

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Horn Coral (Rugose Coral)

Order Rugosa (extinct)

Sandstone (with Chert/Quartzite nodules)

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite

Mosasaur Tooth Fossil

Mosasauridae (likely Prognathodon or Mosasaurus)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Kambaba Jasper

Stromatolite (Fossilized Algae)

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Sandstone Clast

Arenite (primarily SiO2)

Banded Sedimentary Rock (Siltstone/Mudstone with concretion)

Siltstone with Ferruginous Banding

Fossils in Limestone (Crinoid / Marine Invertebrate Fossil)

Fossiliferous Limestone (containing Crinoidea / Brachiopoda)

Fossiliferous Limestone

Limestone (composed primarily of calcite with included fossils CaCO3)

Fossilized Bone

Petrified Bone (Fluorapatite / Calcium Phosphate replacement)

Petrified Wood

Silicified wood (SiO2)

Ironstone Concretion

Siderite or Hematite-bonded Concretion

Weathered limestone or calcareous fossil fragment

Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous limestone

Fossiliferous Limestone

Fossiliferous Calcite (CaCO3)

Crinoid Stem Fossil

Crinoid columnal (Echinodermata)

Weathered quartz-rich stone, possibly fossiliferous limestone

Indeterminate; likely calcite-rich limestone (CaCO₃) or weathered quartz-bearing rock

Fossiliferous Limestone

Limestone (Calcium Carbonate - CaCO3)

Fossil coral (likely colonial/tabulate coral)

Fossilized scleractinian or tabulate coral; calcium carbonate, chiefly CaCO₃ (calcite/aragonite replaced by calcite)

Glauconitic Sandstone with possible Trace Fossil

Glauconitic Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Fossiliferous limestone, possibly containing a brachiopod or bivalve fossil

Calcite-rich limestone (CaCO₃), with an apparent shell impression or shell fragment

Fossiliferous Sandstone with Blastoid / Crinoid Fossil

Echinodermata (Crinoid stem or Blastoid species in Sandstone)

Sandstone

Arenite (SiO2 primarily)

Petrified Wood

Silicified Wood (SiO2)

Fossilized Oyster (Gryphaea or Exogyra)

Crassostrea / Gryphaea (Bivalvia)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)