Fossil

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Ferruginous Sandstone (Gozzan/Ironstone)

Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)

Sandstone (with Feldspathic/Arkose qualities)

Arenite (primarily SiO2 with KAlSi3O8 components)

Limestone (specifically Chalky Limestone)

Calcium Carbonate (CaCO3 / Calcite)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Quartzose)

Arenite (SiO2 based)

Red Siltstone (or Red Shale)

Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

Greywacke

Lithic wacke (variety of Sandstone)

Chert (also known as Flint or Common Chalcedony)

Cryptocrystalline Silica (SiO2)

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose)

Sandstone (Principally SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Sandstone (Quartzose)

Arenite (primarily SiO2)

Coquina

Biogenic Limestone (CaCO3)

Glauconitic Sandstone (or Greensand)

Glauconitic Siliciclastic Rock (Containing (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Graywacke type)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Chert (River Pebble)

Microcrystalline quartz (SiO2)

Sandstone (likely Calcareous or Micaceous)

Clastic sedimentary rock (primarily Quartz with Cementing Agents)

Chert Pebble

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (River Stone/Pebble)

Chert (SiO2)

Shale (Beach-worn)

Laminated Pelite (primarily clay minerals and quartz)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Limestone

Calcium Carbonate (CaCO3)

Fossil Coral (Rugosa or Solitary Coral)

Rugosa (Order), often referred to as 'Horn Coral' (Lithostrotionella or Grewingkia)

Septarian Nodule or Mud Crack Fossil

Septarian Nodule (Concretion)

Rugose Coral (Horn Coral Fossil)

Order Rugosa (fossilized in limestone/chert)

Petrified Wood

Silicified Wood (SiO2)

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (primarily Quartz, SiO2)

Fossil Coral (Petoskey Stone / Rugose Coral)

Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)

Honeycomb Coral Fossil (Petoskey-type Coral)

Favosites (Extinct Colonial Tabulate Coral), CaCO3

Limestone

Calcium Carbonate (CaCO3)

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock