Sedimentary (Volcanic)

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

Coal

Bituminous or Anthracite coal (carbon-rich sedimentary rock)

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cementation)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone with Quartz Vein

Arenite with SiO2 intrusion

Sandstone (Water-worn Cobble)

Arenite (SiO2 based)

Chert / Flint

Cryptocrystalline quartz (SiO2)

Shale

Fissile mudstone (primarily clay minerals and silt-sized quartz)

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Fossil Shell Fragment (possibly Brachiopod or Bivalve)

Calcium Carbonate (CaCO3) - Phylum Brachiopoda or Mollusca

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Sandstone

Arenite

Chert (Flint)

Microcrystalline Quartz (SiO2)

Conglomerate

Conglomerate (Detrital Sedimentary Rock)

Olivine (Peridotite/Dunite)

Olivine (Mg,Fe)2SiO4 within Peridotite

Basalt (Vesicular/Scoriaceous)

Extrusive Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

Piddock-bored Mudstone

Lutite (Siltstone or Mudstone) with Pholad borings

Chert (Yellow Jasper/River Pebble)

Microcrystalline Quartz (SiO2)

Fossilized Crab Carapace (Concretion)

Decapoda (fossil), typically preserved in calcite or siderite concretion

Milky Quartz

Silicon Dioxide (SiO2)

Chert

Silicon dioxide (SiO2)

Chert (potentially Flint or Mudstone)

Microcrystalline Quartz (SiO2)

Agatized Fossil (Druzy Agate)

Silicon Dioxide (SiO2) replacing organic matter

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Chert (variations include Flint)

Chert (SiO2)

Chert (Heart-shaped Pebble)

Cryptocrystalline quartz (SiO2)

Belemnoit (Fossil)

Belemnoidea (Order), Rostrum / Guard

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Banded Chert

Cryptocrystalline Quartz (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Yellow/Tan Sandstone)

Arenite (primarily Quartz, SiO2)

Chert (Green variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Fossilized Shark Tooth in Matrix

Otodus sp. (likely Otodus obliquus)

Milky Quartz

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)