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21 Cards in this Set
- Front
- Back
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Nautiloids
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Predator; swimmer; Ordivician, Silurian & Devonian
Ordivician- Straight Shells Silurian- Curved Devonian- Coiled |
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Corals
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Common of SE Indiana; attached to sea floor as individuals or colonies; tropical, warm shallow sea, salt, stationary, not very turbid; Ordivician-Mississippian (less common in Miss., became very terrestrial)
Columnaria, Steptelasma- Ordivician Heterophrentis- Devonian Halysites- Silurian Lithostrotinella- Mississippian |
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Bryozoans
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Colonian organism; attached to shells or sea floor; different shapes- twig like, screw, lacy, spikes;smaller than corals; very abundant in Ordivian- SE Indiana, Mississippian SC Indiana, Uncommon in Pennsylvanian
Ordivian- Hallopora, Hetertotrypa & Monticulaipora Mississippian- Fenestella and Archimedes Uncommon in Pennsylvanian |
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Brachiopods
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Marine invertebrate; attached by stalk to floor; have 2 shells of unequal size; abundant in Ordivician, less common in Pennsylvanian; bigger, more diverse = calmer & more nutrients; smaller, less diverse= turbulent & stressful; filter feed
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Trilobites
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crawled, floated or swam; sturdy exoskeleton; forager/predator; Ordivician- Silurian
Ordivician - Isolelus Ordivian & Silurian - Calymene Silurian - Dalmanites Devonian - Phacops not common after the Devonian |
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Crinoids
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Stem; stalked; attached, calm sea, warm; Ordivician, Silurian (larger), Devonian (larger), Mississippian (most abundant); plates of the stem are the most commonly preserved
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Blastoid
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Stem; stalked; attached, calm sea, warm; Ordivician, Silurian (larger), Devonian (larger), Mississippian (most abundant); Head/Calyx most common part preserved
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Land Plants
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Pennsylvanian; Carboniferous group, carbonization of ferns preserved in shale and coal
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Brachiopod
Isotelus Ordivian Forager/Predator Bottom-dweller; crawl/swam/float "only segmentation in center of body" |
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Coral
Columnaria Ordivician Attached to sea floor Warm/shallow sea "Brain-like surface/mud-cracks" |
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Brachiopod
Lepidocyclus Ordivician Attached to sea floor by stalk filter-feed "a € shape" |
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Coral
Streptolasma Ordivician Attached warm/shallow/calm sea "cornucopia w/ recessed opening, ridges at lip" |
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Triolbite
Phacops Devonian Forger/predator bottom-dweller; swim/crawl/float "has eyeballs and bumps on his head" |
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Bryozoan
Fenestella Mississippian attached to sea floor "Lace structure within rock - not a crinoid" |
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Brachipod
Platyrochello Ordivician attached to seal floor by stalk filter feed "Bat wings, some ridges- just not in the middle" |
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Crinoid
Stem Mid to Late Paleozoic attached calm/warm/shallow sea "stems if a tree limb" |
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Blastoid
Pentremites Mississippian attached to sea floor filter feed warm/shallow sea "from top, looks like star - PISTACHIOS!" |
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Nautiloid
Ordivician/Silurian Predator swam "Tapering cone, small ridges; inside has tube structures" |
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Bryozoan
Archimedes Mississippian Attached to sea floor filter feed warm/shallow sea "Spiral wall insert" |
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Bryozoan
Hallopora Ordivician attached to sea floor or shells filter feed warm/shallow sea "Spiny, bones/flanges" |
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Coral
Halysites Silurian Attached to sea floor warm/shallow/calm sea "Honeycomb" |
