Sandstone
Arenite (SiO2 principal)
sedimentary
Category
Mineralized Fossil
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Concretion
Sedimentary Concretion (e.g., Siderite or Ironstone)
sedimentary
Sandstone (specifically Lithic or Quartz Arenite)
Arenite (composed primarily of SiO2)
sedimentary
Hag Stone
Perforated sedimentary rock (typically limestone, sandstone, or flint)
sedimentary
Fossilized Coral (Favosites)
Favosites goldfussi / Tabulata
sedimentary
Ironstone Concretion
Siderite or Hematite-bonded Concretion
sedimentary
Petrified Wood
Silicified Wood / Xylopal
fossil
Chert (Vuggy or Fossilliferous)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Fossiliferous Limestone
Carbonate Sedimentary Rock (primarily CaCO3)
sedimentary
Limestone with Fossil Fragments
Bioclastic Carbonate Rock (CaCO3)
sedimentary
Crinoid Stem Fossil (in matrix)
Crinoid (Class Crinoidea)
fossil
Fossiliferous Limestone
Calcium Carbonate - CaCO3
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
fossil
Marine invertebrate fossils (Brachiopods and Gastropods)
Phylum Brachiopoda and Class Gastropoda
fossil
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Sandstone
Arenite (primarily Quartz with Iron Oxide coating)
sedimentary
Fossiliferous Shale (with Vertebrate Bones)
Laminated Mudstone containing Fossilized Bone (Apatite)
sedimentary
Shale
Shale (Consolidated fine-grained clay/silt)
sedimentary
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Sedimentary
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Petrified Wood
Silicified wood / Permineralized wood (SiO2)
fossil
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Fossilized Shark Tooth
Selachii (Elasmobranchii subclass)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Turritella Agate
Elimia tenera silicified fossiliferous chalcedony
fossil
Rugose Coral (Horn Coral) Fossil in Limestone
Order Rugosa (commonly Grewingkia or Zaphrentis genus)
sedimentary
Crinoid and Coral Fossils in Limestone
Fossiliferous Limestone with Rugosa (order) and Crinoidea (class)
sedimentary
Fossiliferous Limestone
Fossiliferous Calclutite / Bio-calcarenite (CaCO3)
sedimentary
Fossil Coral (Rugose Coral Fragment)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Belemite Rostrum
Belemnoidea (Order)
fossil
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Inclusions
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcite, CaCO3)
sedimentary