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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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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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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Submitted on 2008-03-12 by David Thompson

Location (approximate): Jackson, Jackson, MI

Strat unit: Marshall formation

Submitter notes: This is example of straight nautiloid from the Blue Ridge Esker south of Jackson along with a hash of pelecypods. In these photos a US 25 cent piece is used for scale.

Photo title: nautiloid from Lower Marshall Sandstone

Taxa present: Mooreoceras

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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 the reverse side of the previous example showing a gastropod (?) and a part of ammoniod (?) centered in this small block. This sandstone turns up in almost every parking lot in Michigan where cobble stones are used as fill around buildings. These were collected in the esker, however. A 25 cent piece for scale

Photo title: Gastropod from Mississippian Lower Marshall Sandstone

Taxa present: amminoid , gastropod

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Submitted on 2008-03-12 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This example is of an early, but now extinct 'seed fern,' or Pteridosperma. This was collected in the saginaw formation near Grand Ledge, MI at the Lincoln Brick Yard Park just north of the Grand River as were the other plant material shown here. All were collectred in the 1990's

Photo title: Early Pennsylvanian plants from the Saginaw formation at Grand Ledge, MI

Taxa present: Neuropteris tenuifolia

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Submitted on 2008-03-12 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This piece shows several stems and leaf parts in matrix but not enough for good identification as to taxon or species. This is how most of the plant materials appear

Photo title: Early Pennsylvanian plants from the Saginaw formation at Grand Ledge, MI

Taxa present: Plantae

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Submitted on 2008-03-12 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: Here are several different examples of seed ferns (Pteridosperms) from the Grand ledge area. a US 25 cent piece is used for scale in all photos.

Photo title: Early Pennsylvanian plants from the Saginaw formation at Grand Ledge, MI

Taxa present: Neuropteris tenuifolia

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Submitted on 2008-03-12 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This strap-like leaf may be an example of Cordaitale which were common during this period in Michigan`but are also now extinct. Coin for scale.

Photo title: Pennsylvanian plant from the Saginaw formation at Grand Ledge, MI

Taxa present: Cordaites

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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 an example of the straight nautiloids from this formation in close up.

Photo title: Mississippian nautiloid from Lower Marshall Sandstone

Taxa present: Mooreoceras

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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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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 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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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 45mm in diameter and 37mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus multidecoratus

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