Sedimentary (Fossil)

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with fossil inclusions

Fossiliferous limestone with possible ammonite or shell impressions

Calcitic limestone, chiefly CaCO₃; fossils may include ammonoids or bivalves

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

Sandstone with Quarzite clasts

Arenite (SiO2 based)

Fossilized Shark Tooth in Matrix

Otodus sp. (likely Otodus obliquus)

Fossiliferous Limestone

Limestone with fossil bioclasts (Calcium Carbonate, CaCO3)

Fossilized shell or bone fragment

Indeterminate biogenic carbonate/phosphate fossil; likely a fragment of fossil shell or small vertebrate bone

Fossil gastropod shell

Spiral marine gastropod fossil; likely a small ammonite-like or gastropod shell, exact taxon indeterminate

Sandstone

Arenite (SiO2 principal)

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartz-rich)

Arenite (Quartz Arenite)

Sandstone

Arenite (Siliclastic sedimentary rock, primarily SiO2)

Sandstone

Arenite (Sedimentary rock comprising sand-sized grains)

Bivalve Fossil (Clam)

Class Bivalvia (e.g., Mercenaria or similar genus), composed of CaCO3 (Aragonite/Calcite)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Biogenic Inclusions

Crinoid and Coral Fossils in Limestone

Fossiliferous Limestone with Rugosa (order) and Crinoidea (class)

Fossilized bone or tooth fragment

Indeterminate fossil bone; possibly mammalian or reptilian

Weathered limestone

Micritic to fossiliferous limestone, chiefly calcite (CaCO₃)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Rugose Coral (Horn Coral) Fossil in Limestone

Order Rugosa (commonly Grewingkia or Zaphrentis genus)

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Polished fossil coral (likely agatized coral)

Fossilized coral; commonly silicified Scleractinia or Tabulate coral, composed mainly of microcrystalline quartz (SiO₂)

Shale (or Mudstone)

Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock

Brachiopod Fossil in Shale

Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Fossiliferous Limestone

CaCO3 (principally Calcite or Aragonite)

Sandstone (Iron-stained)

Arenite (primarily Quartz, SiO2)

Limestone

Calcium Carbonate (CaCO3)

Petrified Wood

Silicified Wood (SiO2)

Fossilized Coral

Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)

Fossiliferous Limestone

Biogenic Limestone (CaCO3)

Fossiliferous Limestone

Limestone (CaCO3 with Bioclasts)

Fossiliferous Chert (with Fossil Shells)

Silicon Dioxide (SiO2) with biogenic inclusions

Granular Sandstone

Arenite (variable composition, primarily SiO2)

Small shell fragment (likely gastropod or bivalve fossil)

Fossilized calcium-carbonate shell; chiefly aragonite or calcite (CaCO₃)