Shale
Shale (Lutite)
sedimentary
Category
Mineral, Sediment
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Shale
Shale (clay-rich mudstone)
sedimentary
Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
sedimentary
Tumbled jasper (likely picture jasper or iron-rich jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides
sedimentary
Petrified Wood
Fossilized wood / Silicified wood
Sedimentary / Fossil
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Fossilized trilobite
Trilobita; likely an enrolled asaphid or phacopid trilobite
fossil
Sandstone concretion (Ironstone-stained)
Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)
sedimentary
Siderite Concretion (Nodule)
Iron Carbonate (FeCO3) Concretion
sedimentary
Ironstone Concretion
Siderite or Hematite-bonded Concretion
sedimentary
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Fossil scallop/bivalve shell
Fossilized pectinid bivalve; likely family Pectinidae (exact genus/species cannot be determined from the image)
fossil
River Cobble (Mixed Lithology)
Clastic Sedimentary Rock (Silicified Siltstone or Wacke)
sedimentary
Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Green Slate or Metamorphic Rock
Metamorphic rock (chlorite/actinolite-bearing)
metamorphic
Greywacke
Dirty Sandstone (Lithic wacke)
sedimentary
Weathered banded iron formation (iron-rich quartzite)
Banded iron formation (BIF), chiefly hematite/magnetite and microcrystalline quartz (SiO₂)
sedimentary
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Mineral
Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Fossilized Echinoid Fragment (Calycinal/Boss Fossil)
Echinodermata fossil fragment
fossil
Yellow Jasper
Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz
sedimentary
Petrified Wood
Silicified wood (primarily Quartz, SiO2)
fossil
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Jasper (Green/Yellow Moss Jasper)
Silicon Dioxide (SiO2)
mineral
Fossilized Sand Tiger Shark Tooth
Carcharias taurus / Striatolamia macrota (mineralized as Hydroxylapatite/Francolite)
sedimentary (fossil)
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Howlite (White Buffalo Turquoise)
Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5
mineral
Weathered jasper/chert nodule
Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert
sedimentary
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Pebbles
Polymictic rock fragments
sedimentary
River Rock (Mossy)
Stream-rounded Clast (likely Siltstone or Sandstone with bryophytes)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fossil Shark Tooth
Carcharadon sp. (likely Carcharodon carcharias or similar Lamniformes)
fossil
Pebble
Clast (specifically a granule or small pebble)
Sedimentary
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with hematite (Fe2O3) inclusions
mineral