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Placoblastus obovatus, Megistocrinus multidecoratus |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This great combination has a placoblastus measuring 32mm high and 22mm in diameter at it's widest. The crinoid measures 49mm in diameter and 28mm high.
Photo title: Blastoid and Crinoid Pair
Taxa present: Placoblastus obovatus, Megistocrinus multidecoratus
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Megistocrinus multidecoratus, Placoblastus obovatus |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This great combination has a placoblastus measuring 32mm high and 22mm in diameter at it's widest. The crinoid measures 49mm in diameter and 28mm high.
Photo title: Blastoid and Crinoid Pair
Taxa present: Megistocrinus multidecoratus, Placoblastus obovatus
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Unknown sp. |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This undescribed crinoid measures 13mm high x 19mm wide. Another view.
Photo title: Crinoid Calyx
Taxa present: Unknown sp.
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Unknown sp. |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This undescribed crinoid measures 13mm high x 19mm wide.
Photo title: Crinoid Calyx
Taxa present: Unknown sp.
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Atractocrinus concinnus |
Arkona formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: This calyx measures 23mm high and 15mm at the widest.
Photo title: Crinoid Calyx
Taxa present: Atractocrinus concinnus
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Dolatocrinus barrisi |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: A side view of the calyx which measures 34mm in diameter and 20mm high.
Photo title: Crinoid Calyx
Taxa present: Dolatocrinus barrisi
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Dolatocrinus barrisi |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2008-03-13 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: A bottom view of the calyx which measures 34mm in diameter and 20mm high.
Photo title: Crinoid Calyx
Taxa present: Dolatocrinus barrisi
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Stummiana arkonensis |
Alpena formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Alpena formation
Submitter notes: A very rare little trilobite from the Dock Street Clay member. It measures 20mm long x 12mm wide.
Photo title: Trilobite
Taxa present: Stummiana arkonensis
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Crassiproetus microgranulatus |
Genshaw formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Genshaw formation
Submitter notes: This trilobite measures 31mm tall x 20mm wide.
Photo title: Trilobite
Taxa present: Crassiproetus microgranulatus
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Neometacanthus callites |
Alpena formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Alpena formation
Submitter notes: A very unusual trilobite. This specimen measures 37mm long x 21mm wide.
Photo title: Trilobite
Taxa present: Neometacanthus callites
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Dipleura dekayi |
Thunder Bay formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This very rare enrolled trilobite would easily measure over 100mm(4 inches) if it was prone. The above photo shows the specimen from a side view. the trilobite is 55mm wide in this view.
Photo title: Trilobite
Taxa present: Dipleura dekayi
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Dipleura dekayi |
Thunder Bay formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: This very rare enrolled trilobite would easily measure over 100mm(4 inches) if it was prone. The above photo shows the specimen from a top view. the trilobite is 49mm wide in this view.
Photo title: Trilobite
Taxa present: Dipleura dekayi
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Strataster devonicus |
Silica formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This Ophuroid measures about 30mm in diameter. It rests on a slab that is 45mm x 36mm.
Photo title: Brittlestar
Taxa present: Strataster devonicus
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Agelacrinites sp. |
Alpena formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Alpena formation
Submitter notes: This rare fixed starfish from the Dock Street Clay member measures 27mm in diameter. The slab is 62mm square.
Photo title: Edrioasteroid
Taxa present: Agelacrinites sp.
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Pithocrinus cooperi |
Alpena formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Alpena formation
Submitter notes: This inflated crown measures 95mm long x 94mm wide. The calyx is slightly crushed.
Photo title: Crinoid Crown
Taxa present: Pithocrinus cooperi
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Pithocrinus cooperi |
Alpena formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Alpena, Alpena, MI
Strat unit: Alpena formation
Submitter notes: A fine example of a complete crown with 165mm of stem. The crown measures 25mm x 28mm.
Photo title: Crinoid Crown
Taxa present: Pithocrinus cooperi
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Gilbertsocrinus ohioensis |
Silica formation |
Richard Heimlich |
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Submitted on 2008-03-12 by Richard Heimlich
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This crown has its plate structure completely obscured by heavy pyritization.
Photo title: Pyritized Crinoid Crown
Taxa present: Gilbertsocrinus ohioensis
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Arthroacantha carpenteri |
Silica formation |
Richard Heimlich |
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Submitted on 2008-03-12 by Richard Heimlich
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: Two beautiful Arthroacantha crowns on a slab that measures 84mm x 94mm.
Photo title: Crinoid Crowns
Taxa present: Arthroacantha carpenteri
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Mercanites |
Marshall formation |
David Thompson |
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Submitted on 2008-03-12 by David Thompson
Location (approximate): Jackson, Jackson, MI
Strat unit: Marshall formation
Submitter notes: This shows the more complex suturing of the amminoids compared to the nautiloids which are straight with simple rings. Unfortunately there is not too much of the fossil visible so identification is tentative. This is a typical example of the 'rusty' look of fossils in the Lower Marshall sandstone from th 'blue ridge esker' south of Jackson, MI
Photo title: Mississippian Amminoid from Lower Marshall Sandstone
Taxa present: Mercanites
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Mercanites , Palaeoneilo |
Marshall formation |
David Thompson |
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Submitted on 2008-03-12 by David Thompson
Location (approximate): Jackson, Jackson, MI
Strat unit: Marshall formation
Submitter notes: This is a full view of the specimen with the amminoid showing a number of different pelecypods including Palaeoneilo. Preservation is not as detailed as other matrix.
Photo title: Pelecypods from Mississippian Lower Marshall Sandstone
Taxa present: Mercanites , Palaeoneilo
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