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Pithocrinus cooperi, Platyceras rarispinum, Favosites 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: The gastropod sits atop the crinoid calyx near a Favosites coral. The entire specimen measures 83mm x 62mm.
Photo title: Crinoid Calyx with Spined Gastropod
Taxa present: Pithocrinus cooperi, Platyceras rarispinum, Favosites sp.
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Aorocrinus 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 little crown measures 42mm high x 40mm wide.
Photo title: Crinoid Crown
Taxa present: Aorocrinus sp.
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Halysiocrinus barrisi |
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: An unusual flexible crinoid from the Dock Street Clay member. It measures 50mm high x 31mm wide and rests on a slab 69mm x 61mm. Formerly known as Cunctocrinus.
Photo title: Crinoid Crown
Taxa present: Halysiocrinus barrisi
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Decadocrinus 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 crown measures 38mm high with about 30mm of stem. The slab is 52mm x 46mm.
Photo title: Crinoid Crown
Taxa present: Decadocrinus sp.
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Synbathocrinus matutinus |
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: A rare small crown measuring 49mm high and 7mm wide. The slab measures 55m x 37mm.
Photo title: Crinoid Crown
Taxa present: Synbathocrinus matutinus
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Synbathocrinus matutinus |
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: A rare crinoid crown measuring 63mm high and 10mm wide. The slab measures 105m x 44mm.
Photo title: Crinoid Crown
Taxa present: Synbathocrinus matutinus
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Cadiscocrinus sp., Euryocrinus 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: A beautiful slab with two different crinoid genera and an unidentified coral. The slab measures 115mm x 117mm.
Photo title: Crinoid Crowns
Taxa present: Cadiscocrinus sp., Euryocrinus sp.
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Michelanoceras pustulosum, Reptaria sp. |
Traverse formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): Petoskey, Emmet, MI
Strat unit: Traverse formation
Submitter notes: A large nautiloid cephalopod From the Gravel Point formation measuring 77mm long, 68mm at the widest and 45mm thick.
Photo title: Nautiloid Cephalopod with Encrusting Bryozoan
Taxa present: Michelanoceras pustulosum, Reptaria sp.
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Pleuronotus decewi |
Rogers City formation |
Pat Rutkowski |
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Submitted on 2008-03-12 by Pat Rutkowski
Location (approximate): , Presque Isle, MI
Strat unit: Rogers City formation
Submitter notes: A large unusual gastropod measuring 69mm x 87mm.
Photo title: Gastropod
Taxa present: Pleuronotus decewi
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Pseudorthoceras sp. |
Saginaw formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): Grand Ledge, Eaton, MI
Strat unit: Saginaw formation
Submitter notes: A rare nautiloid from the Pennsylvanian of Michigan. The specimen measures 2.2 inches x .6 inches.
Photo title: Nautiloid
Taxa present: Pseudorthoceras sp.
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Mooreoceras sp. aff. M. cliftonense |
Marshall formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Calhoun, MI
Strat unit: Marshall formation
Submitter notes: Three nautiloids, the largest measuring 110mm x 31mm and the smallest at 51mm x 41mm.
Photo title: Nautiloids
Taxa present: Mooreoceras sp. aff. M. cliftonense
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Palaeoneilo sulcantina |
Marshall formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Jackson, MI
Strat unit: Marshall formation
Submitter notes: A nicely preserved specimen measuring 38mm x 20mm resting on a slab measuring 90mm x 71mm
Photo title: Pelecypod
Taxa present: Palaeoneilo sulcantina
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Allorisma sp. |
Bayport formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): Bellevue, Eaton, MI
Strat unit: Bayport formation
Submitter notes: A nice inflated clam measuring 51mm x 23mm.
Photo title: Pelecypod
Taxa present: Allorisma sp.
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Ctenacantha sp. |
Michigan formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): Grand Rapids, Kent, MI
Strat unit: Michigan formation
Submitter notes: Middle Mississippian specimens collected in the Michigan Natural Storage mine in 1998. An underground gypsum mine.
Photo title: Shark Coprolite
Taxa present: Ctenacantha sp.
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Psammodus sp. |
Bayport formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Huron, MI
Strat unit: Bayport formation
Submitter notes: A large shark tooth associated with coral specimens collected in 1992. The tooth measures 39mm x 20mm.
Photo title: Shark Tooth
Taxa present: Psammodus sp.
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Psammodus sp. |
Bayport formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Huron, MI
Strat unit: Bayport formation
Submitter notes: A rare occurance of a Mississippian shark tooth. It measures 30mm x 14mm.
Photo title: Shark Tooth
Taxa present: Psammodus sp.
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Unknown sp. |
Bayport formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Huron, MI
Strat unit: Bayport formation
Submitter notes: specimen one of two of an unknown Genus/species of fish collected in 1990. This specimen measures 46mm x 39mm.
Photo title: Fish Remains
Taxa present: Unknown sp.
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Unknown sp. |
Bayport formation |
Pat Rutkowski |
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Submitted on 2008-11-24 by Pat Rutkowski
Location (approximate): , Huron, MI
Strat unit: Bayport formation
Submitter notes: specimen two of two of an unknown Genus/species of fish collected in 1990.
Photo title: Fish Remains
Taxa present: Unknown sp.
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Arthroacantha carpenteri, Undescribed sp. |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: An amazing slab of 7 complete and partial crowns. 4 mature undescribed ophiuroids and 40+ immature brittlestars also litter the surface of this wonderful death plate.The overall size of this slab is 13.5 X 15.5 inches and 2.25 inches thick. Collected many years ago.
Photo title: CRINOIDS AND BRITTLESTARS
Taxa present: Arthroacantha carpenteri, Undescribed sp.
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Undescribed sp., Arthroacantha carpenteri |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A closer view of the amazing slab of 7 complete and partial crowns. 4 mature undescribed ophiuroids and 40+ immature brittlestars also litter the surface of this wonderful death plate. The overall size of this slab is 13.5 X 15.5 inches and 2.25 inches thick. Collected many years ago. Note the 2 mature ophiuroids just above center in the photo and 2 more nestled together in the upper left. Many immature specimens can be seen scattered about.
Photo title: CRINOIDS AND BRITTLESTARS
Taxa present: Undescribed sp., Arthroacantha carpenteri
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