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Ordovician

Ordovician: A pair of trilobites in Cambrian seas

A pair of trilobites in Cambrian seas

Ordovician: Triarthrus trilobite

Triarthrus trilobite

Triarthrus trilobite, side profile

Ordovician: Geological timescale (1867)

Geological timescale (1867)

Ordovician: Squid-like Orthoceratites attempt to make meals of ?

Squid-like Orthoceratites attempt to make meals of ?

Ordovician: Ernst Haeckel, Tetracorallia, Extinct Corals

Ernst Haeckel, Tetracorallia, Extinct Corals

Ordovician: Crystal apple - cystoid echinoderm

Crystal apple - cystoid echinoderm

Ordovician: Dorsal & Ventral Isotelus platycephalus

Dorsal & Ventral Isotelus platycephalus

Ordovician: Remopeurides, a fossil trilobite

Remopeurides, a fossil trilobite

Ordovician: Didymograptus, fossil graptolite

Didymograptus, fossil graptolite

Ordovician: Asaphus (Neoasaphus) kowalewskii, stalk- eyed trilobite

Asaphus (Neoasaphus) kowalewskii, stalk- eyed trilobite

Ordovician: Crystal apple - cystoid echinoderm

Crystal apple - cystoid echinoderm

Ordovician: Didymograptus, graptolite

Didymograptus, graptolite

Ordovician: Platanaster ordovicus, starfish

Platanaster ordovicus, starfish

Ordovician: Orthoceras, nautiloid

Orthoceras, nautiloid

Ordovician: Ordovician Britain

Ordovician Britain

Ordovician: Ordovician seascape

Ordovician seascape

Ordovician: Chasmatopora furcata eichwald, bryozoan

Chasmatopora furcata eichwald, bryozoan

Ordovician: Cothurnocystis elizae Bather, carpoid

Cothurnocystis elizae Bather, carpoid

Ordovician: Trinucleus, trinucleid trilobite

Trinucleus, trinucleid trilobite

Ordovician: Didymograptus murchisoni, graptolite

Didymograptus murchisoni, graptolite

Ordovician: Dictyonema flabelliforme, gaptolite

Dictyonema flabelliforme, gaptolite

Ordovician: EVOLUTION OF FACE

EVOLUTION OF FACE

Ordovician: Bigsby Medal of the Geological Society

Bigsby Medal of the Geological Society

Ordovician: Streptelasma, coral

Streptelasma, coral

Ordovician: Trinucleus, a fossil trilobite

Trinucleus, a fossil trilobite

Ordovician: Trinodus, a fossil trilobite

Trinodus, a fossil trilobite

Ordovician: Conodonts, tooth like fossils

Conodonts, tooth like fossils

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