Weathered fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Category
Sedimentary (Fossil)
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Weathered chert or silicified limestone nodule
Microcrystalline quartz (SiO₂), possibly with calcite (CaCO₃)
sedimentary
Shale fragment
Shale (Laminated Mudstone)
sedimentary
Fossilized Shark Teeth in Matrix
Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix
fossil
Fossiliferous limestone
Bioclastic micrite/wackestone, likely containing crinoid or shell fragments
sedimentary
Fossiliferous Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Shark Tooth Fossil
Chondrichthyes (shark) tooth
fossil
Crinoid Stem Fossils (Indian Beads / St. Cuthbert's Beads)
Crinoid columnal ossicles (phylum Echinodermata)
fossil
Fossilized gastropod shell
Calcitic or aragonitic gastropod fossil; likely Mollusca, Gastropoda
fossil
Weathered fossil-bearing limestone
Bioclastic limestone, chiefly calcite (CaCO₃), possibly containing a brachiopod or coral fossil
sedimentary
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Rounded limestone pebble
Limestone; predominantly calcite (CaCO₃), possibly micritic or fossiliferous
sedimentary
Rounded fossiliferous limestone or weathered limestone nodule
Likely bioclastic limestone, composed mainly of calcite (CaCO₃); exact identification is limited by the blurry image
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Possible fossilized shell or fossil fragment
Indeterminate; possibly a small brachiopod or gastropod fossil in mineralized matrix
fossil
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Tumbled fossiliferous limestone
Calcite-rich limestone (CaCO₃), possibly containing fossil fragments
sedimentary
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in Sedimentary Matrix (CaCO3)
fossil
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Vesicular basalt (possibly weathered scoria)
Basaltic volcanic rock; chiefly plagioclase, clinopyroxene, and Fe–Mg oxides, with vesicles from trapped gas
igneous
Fossiliferous Limestone (Crinoidal Limestone)
Bioclastic grainstone (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Echinoid Fossil (Fossilized Sea Urchin)
Echinoidea
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Tumbled kambaba jasper (likely)
Kambaba jasper, a silica-rich microcrystalline quartz aggregate, commonly containing fossilized cyanobacterial structures and dark green amphibole/pyroxene minerals
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sedimentary Rock Fragments
Clastic Sedimentary Rock
sedimentary
Turritella Agate (Elimia Agate)
Silicified Elimia tenera (formerly misidentified as Turritella)
sedimentary (silicified fossiliferous chalcedony)
Sandstone Pebbles
Arenite
sedimentary
Fossiliferous Limestone
Bioclastic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Carbonate Rock (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossiliferous Limestone (Coquina-like)
Biogenic Limestone
sedimentary