Fossil

Siderite Concretion

Ironstone (Siderite) Concretion, FeCO3

Fossil shell fragment (likely bivalve)

Bivalvia indeterminate; shell material chiefly aragonite or calcite (CaCO₃)

Weathered limestone

Micritic to fossiliferous limestone, chiefly calcite (CaCO₃)

Likely weathered petrified wood

Silicified wood, chiefly microcrystalline quartz (SiO₂) replacing wood tissue

Fossilized tooth, likely mammalian molar

Silicified or mineral-replaced mammalian tooth; exact taxon cannot be determined from the image

Polished stromatolite (likely fossilized microbial mat)

Fossil stromatolite; chiefly microcrystalline quartz (SiO₂), commonly replacing carbonate

Fossil Shark Tooth (Sand Tiger Shark type)

Carcharias sp. (likely Odontaspis)

Petrified Wood

Silicified Wood (SiO2)

Turritella Agate

Elimia tenera silicified fossiliferous chalcedony

Marine invertebrate fossils (Brachiopods and Gastropods)

Phylum Brachiopoda and Class Gastropoda

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (Quartz / Chalcedony replacement)

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)

Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)

Fossilized Shell Fragment / Mother of Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (mainly Quartz/Chalcedony, SiO2)

Fossilized Coral

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

Fossilized Brachiopod or Gastropod

Phylum Brachiopoda / Phylum Mollusca

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Rugose Coral (Horn Coral) Fossil in Limestone

Order Rugosa (commonly Grewingkia or Zaphrentis genus)

Fossilized Shark Tooth

Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Petrified Wood

Silicified Wood (SiO2)

Fossiliferous Limestone

Fossiliferous Calclutite / Bio-calcarenite (CaCO3)

Fossil Coral (Rugose Coral Fragment)

Rugosa (extinct order of solitary and colonial corals)

Small marine shell fragment

Calcareous shell, primarily calcium carbonate (aragonite or calcite); exact taxon indeterminate

Fossilized bone fragment, possibly vertebra

Fossil bone (mineralized hydroxyapatite; exact taxon indeterminate)

Fossiliferous limestone

Calcite-rich carbonate rock; chiefly CaCO₃ (often bioclastic limestone)

Fossil ammonite fragment

Ammonoidea (likely a small heteromorph or coiled ammonite; exact genus indeterminate)

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Fossilized Brachiopod Shell / Mold

Phylum Brachiopoda (Fossilized organic matrix replaced by Silica/Calcite)

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Tumbled fossil-bearing limestone (likely crinoid or shell fragment)

Fossil carbonate; predominantly calcite (CaCO₃)

Fossilized Coral (Petoskey Stone / Favosites)

Hexagonaria percarinata / Favosites sp. (Calcite, CaCO3)

Fossiliferous Limestone

Limestone (Calcium Carbonate) with Fossil Inclusions

Weathered limestone

Calcite-rich carbonate rock, primarily CaCO₃

Fossilized Coral (Petoskey-like or Favosites)

Anthozoa (Fossilized Coral)