Sedimentary (Fossiliferous)

Weathered limestone

Calcitic limestone, primarily CaCO₃ (often recrystallized toward marble)

Fossilized Pycnodonte Oyster

Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)

Sandstone or Mudstone

Sedimentary Rock

Fossiliferous limestone fragment

Calcitic limestone; mainly calcium carbonate (CaCO₃), possibly with shell or coral debris

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Rounded river cobble, likely weathered sandstone or siltstone

Quartz-rich clastic sedimentary rock; exact identification requires a fresh surface and testing

Tumbled fossiliferous limestone

Calcite-rich limestone (CaCO₃), possibly fossiliferous micrite

Turritella Agate

Silicified Elimia tenera Fossil (SiO2)

Likely weathered gray limestone or shale fragment

Calcite-rich carbonate rock (limestone), possibly calcareous shale

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Fossiliferous limestone pebble

Bioclastic limestone, commonly calcitic (CaCO₃)

Weathered fossiliferous limestone

Calcitic limestone, primarily calcium carbonate (CaCO₃), possibly containing fossil shell fragments

Fossiliferous limestone pebble

Calcite-rich limestone (primarily CaCO₃), with possible fossil or fossil-fragment patterns

Sandstone (likely Quartzose type)

Clastic sedimentary rock (primarily SiO2)

Fossiliferous limestone fragment

Limestone, chiefly calcite (CaCO₃), possibly containing shell or coral fossil material

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Fossiliferous Sandstone (with Quartz patch)

Sedimentary Sandstone with Silicified Shell Fragments

Fossilized shell-bearing limestone

Bioclastic limestone, likely molluscan/coquina limestone (calcite, CaCO₃)

Weathered sandstone or siltstone exposure

Quartz–feldspar clastic sedimentary rock; exact lithology indeterminate from the image

Porous fossiliferous limestone

Calcitic limestone, predominantly calcium carbonate (CaCO₃), possibly bioclastic or weathered reef limestone

Fossilized Oyster Shell

Exogyra or Ostrea (Gryphaeidae/Ostreidae family)

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Weathered limestone fragment

Limestone, primarily calcite (CaCO₃)

Likely weathered limestone pebble

Micritic limestone, mainly calcite (CaCO₃)

Likely limestone

Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous or dolomitic limestone

Limestone

Limestone (CaCO3)

Weathered fossiliferous limestone

Calcitic limestone; predominantly calcium carbonate (CaCO₃), commonly containing fossil fragments

Mixed beach gravel and cobbles

Polylithic alluvial or littoral clasts, including quartz, quartzite, chert, limestone, sandstone, and flint

Pyritic Shale

Carbonaceous Shale with Iron Pyrite (FeS2)

Script Jasper

Silicon Dioxide (SiO2) with impurities

Glauconitic Sandstone

Glauconitic Quartz Arenite

Rounded limestone pebble

Calcite-rich limestone (CaCO₃)

Fossiliferous Limestone Pebble

Biogenic Sedimentary Rock (CaCO3)

Fossiliferous Limestone / Petrifaction

Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)

Fossiliferous Limestone with Fossil Fragment

Fossiliferous Limestone (CaCO3 with organic remains)

Polished fossiliferous limestone

Bioclastic limestone, commonly fossil-rich micrite or wackestone

Likely fossiliferous limestone

Micritic limestone, chiefly calcite (CaCO₃), possibly containing shell or coral fragments

Chert or silicified fossil nodule (tentative)

Microcrystalline quartz (SiO₂), possibly fossiliferous chert

Coquina / Fossiliferous Limestone

Calcareous bioclastic sedimentary rock (CaCO3)

Weathered fossiliferous limestone

Calcitic limestone, primarily CaCO₃; possible bioclastic fossil limestone

Polished fossiliferous limestone

Bioclastic limestone, commonly crinoidal or shell-rich micrite

Tumbled fossiliferous limestone

Micritic limestone, likely bioclastic/fossiliferous carbonate rock (predominantly CaCO₃)