Sedimentary (Fossiliferous)

Coquina

Biogenic Limestone (Calcite / CaCO3)

Oolitic Limestone / Fossiliferous Chert

Oolitic Limestone (CaCO3) / Silicified Limestone

Fossiliferous shale or mudstone with plant fossils

Carbonaceous mudstone/shale containing fossilized foliage, likely fern or seed-fern impressions

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Fossiliferous Limestone with Rugose Coral

Calcium Carbonate (CaCO3) featuring Rugosa (extinct order of solitary and colony corals)

Fossiliferous Limestone (with Coralline Inclusions)

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Crinoidal Limestone)

Calcium Carbonate with Crinoid Stem Fossils (CaCO3)

Fossiliferous Limestone with Crinoid stems

Limestone (CaCO3) containing Crinoidea fossils

Fossiliferous Limestone with Crinoid Stem fragment

Calcite (CaCO3) containing Crinoidea fossils

Limestone (specifically Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Limestone (specifically Fossiliferous or Crinoidal Limestone)

Calcium Carbonate (CaCO3) - Calcite Rock

Fossiliferous Shale (with Vertebrate Bones)

Laminated Mudstone containing Fossilized Bone (Apatite)

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Polished fossiliferous limestone, possibly ammonite-bearing

Calcite-rich limestone (CaCO₃), with fossil shell material

Weathered carbonate rock, possibly fossiliferous limestone

Calcite-rich limestone (CaCO₃), tentative identification

Fossiliferous limestone with possible shell fossils

Bioclastic limestone, composed mainly of calcite (CaCO₃)

Petrified Wood (Black / Carbonized)

Silicon Dioxide (Quartz/Chalcedony replacing Organic Matter)

Weathered limestone

Micritic limestone, primarily calcite (CaCO₃)

Limestone

Calcium Carbonate (CaCO3)

Weathered limestone pebble

Limestone, predominantly calcite (CaCO₃), possibly fossiliferous or oolitic

Fossilized shell-bearing limestone

Fossiliferous limestone, likely containing brachiopod or bivalve remains; exact taxon requires microscopy

Weathered fossil-bearing limestone pebble

Micritic limestone, chiefly calcium carbonate (calcite, CaCO₃), possibly containing a fossil cavity or internal mold

Weathered limestone cobble

Limestone, predominantly calcite (CaCO₃)

Fossil brachiopod or bivalve shell

Indeterminate fossilized shell; likely a ribbed brachiopod (Order Productida or Spiriferida)

Fossiliferous limestone with possible ammonite or shell impressions

Calcitic limestone, chiefly CaCO₃; fossils may include ammonoids or bivalves

Weathered limestone fragment

Limestone, predominantly calcite (CaCO₃)

Limestone (River Pebble / Fossiliferous Limestone)

Calcium Carbonate (CaCO3)

Fossiliferous sandstone with plant fossils

Likely fossil-bearing siliciclastic sedimentary rock; apparent fragments may be fossil wood or leaf impressions, but species cannot be determined from the image

Reddish-brown sandstone pebble

Quartz-rich sandstone, likely ferruginous sandstone

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Rock (Invertebrate Fossil in Matrix)

Fossiliferous limestone or shaly matrix containing skeletal fossil remains

Weathered limestone fragment

Calcite-rich limestone (CaCO₃), possibly chalky or fossiliferous limestone

Weathered sandstone fragment

Clastic sandstone, composed mainly of quartz and feldspar grains cemented by silica, calcite, or iron oxides

Chert or flint fragment

Microcrystalline quartz (SiO₂), likely silicified rock

Rounded limestone pebble

Micritic limestone, composed mainly of calcite (CaCO₃)

Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Mudstone / River Pebble

Sedimentary rock with trace fossil or inclusion

Polished fossiliferous limestone pebble

Fossiliferous micritic limestone, probably containing gastropod or bivalve fragments

Fossiliferous Limestone (Crinoid stem fossils)

Sedimentary Limestone with Crinoidea ossicles

Weathered limestone

Micritic limestone, primarily calcium carbonate (CaCO₃; calcite)