Igneous And Fossil

Fossiliferous Brachiopod in Shale

Brachiopoda (Phylum) preserved in Carbonaceous Shale

Weathered fossiliferous limestone

Calcitic limestone, predominantly calcium carbonate (CaCO₃), possibly containing shell or coral fossil fragments

Fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)

Fossil-bearing limestone, possibly a crinoid or shell fragment

Calcite (CaCO₃) limestone containing an indeterminate marine fossil

Likely fossiliferous limestone fragment

Calcareous fossil assemblage, chiefly calcium carbonate (CaCO₃), possibly crinoid, bivalve, or bryozoan material in limestone

Granite-like granitoid

Felsic intrusive igneous rock, chiefly quartz, feldspar, and minor mica (compositionally near granite or granodiorite)

Polished granite pebble

Granite, typically quartz–feldspar–mica aggregate

Brachiopod Fossil

Rhynchonellida (Order)

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

Fossil Shark Tooth

Chondrichthyes (class)

Siltstone with plant fossil impression

Sedimentary rock with Archaeopteris or Calamites flora impression

Bivalve Fossil (Clam)

Class Bivalvia (e.g., Exogyra or Gryphaea species)

Fossilized Gastropod / Coral

Phylum Mollusca / Cnidaria (Silicified or Calcified)

Shark Tooth Fossil

Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)

Fossilized Bone

Permineralized Vertebrate Bone

Fossil-bearing Sedimentary Rock

Sedimentum cum fossili

Fossil fish slab

Fossilized fish remains, likely a laminated shale-hosted vertebrate fossil; exact taxon is indeterminate from the image

Fossil gastropod shell

Calcareous mollusk shell, chiefly aragonite or calcite (likely a large marine gastropod)

Small weathered fossil or mineral fragment

Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral

Fossiliferous Sandstone (with Brachiopod or Bivalve mold)

Clastic Sedimentary Rock with Macrofossil Mold

Polished fossil bone fragment

Fossilized bone, likely mammalian or reptilian; exact taxon cannot be determined from the image

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Tumbled snowflake obsidian

Obsidian (volcanic glass), SiO₂, with cristobalite spherulites

Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)

Phylum Mollusca, Class Bivalvia

Likely tumbled pink-and-gray granite or gneiss

Granite: quartz, feldspar, and mica; possibly banded gneiss with similar minerals

Fossilized bone, likely a large vertebrate limb or rib fragment

Petrified bone; exact taxon indeterminate from the image

Fossil oyster shell fragment

Fossilized oyster (Ostreidae), composed mainly of calcite (CaCO₃)

Fossil Shark Tooth

Otodus sp. (Eocene shark fossil)

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Fossilized Nut / Coprolite / Concretion

Trace Fossil / Permineralized Plant Material

Granite-like rounded cobble

Probably granitic rock, composed mainly of quartz, feldspar, and dark mafic minerals; exact identification is uncertain from the photograph.

Weathered, iron-stained rock (likely sandstone or breccia)

Indeterminate clastic sedimentary rock; possible ferruginous sandstone or weathered breccia

Rounded quartz-rich river pebble

Likely quartz arenite or quartz-rich sandstone; exact identification requires testing

Fossiliferous Limestone with Crinoid Stem

Sedimentary Rock with Echinodermata fossil fragment

Fossilized Belemnite Rostrum

Belemnitida

Bivalve Fossil (Brachiopod or Scallop)

Class Bivalvia (or potentially Phylum Brachiopoda)

Fossilized Brachiopod Shell Fragment

Brachiopoda (Class: Rhynchonellata or Strophomenata)

Peanut Wood

Petrified Wood (Silicified Araucaria with Teredo boreholes)

Crinoid Stem Fragment

Crinoid (Class Crinoidea)

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class)

Fossilized Gastropod in Limestone

Gastropoda (Class) in Calcium Carbonate (CaCO3)

Fossil Sea Urchin / Echinoid

Class Echinoidea