Geol 107 Virtual Lab Exam

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Cyanobacterial Stromatolites (map view)

Age: Archean - Present

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Cyanobacterial Stromatolites (Cross-Section

Age: Archean - Present

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Prokaryote Microfossils

Age: Early Proterozoic (2 Ga)

Remarks: Gunflint chert

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Acritarch

Age: Middle Proterozoic (1600 Ma) - Recent

Remarks: Large size and complex ornamentation identify as eukaryote microfossil

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Name: Swartpuntia

Age: Ediacaran

Remarks: Impression of soft-bodied animal in sandstone

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Genus: Dickinsonia

Age: Ediacaran

Remarks: impression of soft-bodied animal in sandstone

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Phylum: Cnidaria

Name: Fond and Attachment Disc

Age: Ediacaran

Remarks: impression of soft-bodied animal in sandstone

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Phylum: Anthropoda

Name: Spriggina

Age: Ediacaran

Remarks: Impression of soft-bodied animal in sandstone ("stem-group" arthropod)

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Name: Tribrachidium

Age: Ediacaran

Remarks: impression of soft-bodied animal in sandstone

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Phylum: Porifera

Name: Glass Sponge

Age: Phanerozoic (Cambrian - Present)

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Phylum: Porifera

Name: Archaeocyathan

Age: Cambrian

Remarks: Cambrian reef-builder

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Phylum: Porifera

Name: Stromatoporoid

Age: Ordovician - Devonian

Remarks: Ordovician to Devonian reef-builder

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Phylum: Cnidaria

Name: Solitary Coral

Age: Ordovician - Permian

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Phylum: Cnidaria

Name: Colonial Coral

Age: Ordovician - Permian

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Phylum: Bryozoa

Name: Bryozoan

Age: Ordovician - Present

Remarks: Stick shaped

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Phylum: Bryozoa

Name: Bryozoan

Age: Ordovician to Present

Remarks: Mound shaped

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Phylum: Bryozoa

Name: Bryozoan

Age: Ordovician to Present

Remarks: Screw- shaped (especially common in the Carboniferous

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Phylum: Brachiopod

Name: Brachiopod

Age: Cambrian - Present (common in Paleozoic)

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Phylum: Brachiopoda

Name: Brachiopod

Age: Cambrian - Present (common in Paleozoic)

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Phylum: Brachiopoda

Name: Brachiopod

Age: Cambrian - Present (common in Paleozoic)

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Phylum: Mollusca

Name: Gastropod (snail)

Age: Phanerozoic (Cambrian - Present)

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Phylum: Mollusca

Name: Gastropod (Snail)

Age: Phanerozoic (Cambrian - Present)

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Phylum: Mollusca

Name: Gastropod (snail)

Age: Phanerozoic (Cambrian to present)

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Phylum: Mollusca

Name: Bivalve (clam)

Age: Phanerozoic (Cambrian - Present)

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Phylum: Mollusca

Name: Cephalopod

Age: Ordovician - Devnonian

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Phylum: Mollusca

Name: Cephalopod

Age: Devonian-Cretaceous

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Phylum: Arthropoda

Genus: Marella

Age: Cambrian

Remarks: most common fossil in the Burgess Shale

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Phylum: Arthropoda

Name: Trilobite

Age: Cambrian - Devonian

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Phylum: Arthropoda

Name: Trilobite

Age: Cambrian - Devnonian

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Phylum: Arthropoda

Name: Eurypterid

Age: Ordovician to Permian

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Phylum: Arthropoda

Name: Ostracod

Age: Ordovician to Present

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Phylum: Echinodermata

Name: Starfish

Age: Ordovician to Present

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Phylum: Echinodermata

Name: Crinoid

Age: Ordovician - Present

Remarks: Attached to sea bottom by a stem

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Phylum: Echinodermata

Name: Crinoid

Age: Ordovician to Present

Remarks: Attached to seabottom by stem, feathery feeding arms

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Phylum: Echinodermata

Name: Crinoid stem pieces

Age: Ordovician - Present

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Name: Graptolite

Age: Ordovician and Silurian

Remarks: Ordovician graptolites are multi-branched

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Name: Graptolite

Age: Ordovician and Silurian

Remarks: Silurian graptolites are unbranched

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Phylum: Chordata

Name: Placoderm (primitive armoured fish)

Age: Devonian

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Phylum: Chordata

Name: Placoderm (primitive armoured fish)

Age: Devonian

Remarks: Skull 2m high

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Phylum: Chordata

Name: Early Amphibian

Age: Carboniferous to Permian

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Phylum: Chordata

Name: Dimetrodon

Age: Permian

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Rhyniophyte

Age: Silurian - Devonian

- oldest flora of vascular plants

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Trimerophyte

Age: Devonian

- primitive vascular plant

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Lycopod

Age: Devonian - Present

- characteristic of Carboniferous floras

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"Horsetail"

Age: Devonian to Present

- characteristic of Carboniferous floras

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Progymnosperm

Name: Archeopteris leaves

Age: Devonian - Early Carboniferous

Remarks: first woody trees

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Progymnosperm

Name: Archeopteris

Age: Devonian - Early Carboniferous

Remarks: first woody trees

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Fern

Age: Devonian to Recent

Remarks: especially important in Carboniferous - Triassic

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Seed Fern

Age: Carboniferous - Triassic

Remarks: Oldest Gymnosperms

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Seed Fern

Name: Glosspetris Leaves

Age: Permian

Remarks: Characteristics Permian flora of Gondwana