Sedimentary Rock

Gastropod Steinkern (Internal Mold Fossil)

Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Fossiliferous Sedimentary Rock (Coquina/Limestone)

Fossiliferous Calcarenite / Bioclastic Limestone

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)

Sedimentary rock with quartz veining

Laminated siltstone or mudstone with hydrothermal quartz veins

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Shale

Shale (fine-grained clastic sedimentary rock)

Sandstone or Limestone

Sedimentary Rock

Amber-bearing Coal/Sedimentary Rock

Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)

Chalk

CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Sandstone

Arenite or Sandstone

Conglomerate

Conglomerate (a clastic sedimentary rock)

Puddingstone (Jasper Conglomerate)

Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)

Sandstone

Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)

Conglomerate

Conglomerate

Shale

Lutaceous sedimentary rock

Shale

Fissile mudstone (Shale)

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Conglomerate

Conglomerative Sedimentary Rock

Conglomerate (or Breccia)

Clastic Sedimentary Rock

Sandstone (likely Graywacke or Lithic Sandstone)

Clastic Sedimentary Rock

Conglomerate

Conglomerate (Sedimentary rock)

River Pebble (Siltstone/Mudstone)

Clastic sedimentary rock

River Rock (likely Siltstone or fine-grained Sandstone)

Clastic Sedimentary Rock

Sandstone

Arenite (Sedimentary Rock)

Shale

Lutaceous Sedimentary Rock

Shale (sub-type: Carbonaceous Shale)

Lutaceous Sedimentary Rock

Sandstone (likely Arkosic)

Clastic Sedimentary Rock

Hag Stone

Perforated Sedimentary Rock

Shale or Siltstone

Sedimentary Rock (Siliciclastic)

Siltstone or Mudstone

Argillaceous sedimentary rock

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (likely Siltstone or fine-grained Sandstone)

Sedimentary Rock (Clastic)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Shale

Fissile Siliciclastic Sedimentary Rock

Fossil Bivalve Shell

Class Bivalvia (e.g., Veneriidae family)