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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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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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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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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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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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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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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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A very large extended trilobite measuring 80mm long x 52mm wide.

Photo title: Trilobite

Taxa present: Phacops crassituberculata

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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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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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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A nice specimen measuring 34mm long x 23mm wide.

Photo title: Trilobite

Taxa present: Basidechenella rowi arkonensis

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: A nice trilobite measuring 33mm x 20mm.

Photo title: Trilobite

Taxa present: Greenops widderensis

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: A very nice colony measuring 100mm x 71mm. Commonly known as Petosky stone.

Photo title: Colonial Coral

Taxa present: Spongophyllum alpenense

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A Ventral spine plate from an unknown placoderm fish.

Photo title: Placoderm Spine

Taxa present: Unknown

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: A bed of several brachiopods on a slab measuring 117mm x 51mm.

Photo title: Brachiopods

Taxa present: Athyris sp.

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: A pyritized partial specimen measuring 45mm x 17mm.

Photo title: Ammonite

Taxa present: Tornoceras (T.) mesopleuron

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Five small ammonites and a tiny gastropod from 11mm to 13mm in diameter.

Photo title: Ammonites and Gastropod

Taxa present: Tornoceras arkonense

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Submitted on 2008-03-12 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: A tegmen(top) view of the calyx which measures 34mm in diameter and 25mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus concavus

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Submitted on 2008-03-12 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 25mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus concavus

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Submitted on 2008-03-12 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 25mm high.

Photo title:

Taxa present: Megistocrinus concavus

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