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 2008-10-22 by ummp invertebrate paleontology

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This specimen is a hypotype. It is about 2cm top to bottom.

Photo title: Pelecypod

Taxa present: Naiadites elongata

UMMP specimen number: hypotype 13156

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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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Submitted on 2009-01-17 by ummp invertebrate paleontology

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This specimen is a hypotype. It is 3.5 cm tall.

Photo title: Brachiopod

Taxa present: Linoproductus cora

UMMP specimen number: hypotype 13129

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This is a root section of a Lycopod tree from the Pennsylvanian of central Michigan. The overall length of the root is 16.3 inches while the matrix is 10 inches long and about 3 inches deep. Rootlets can be seen going into the matrix. This is from the Lincoln Brick park near Grand Ledge and was collected in 1994. Lycopods were large trees that formed the deep swamps of the Pennsylvanian & this is probably from a Lepidodendron sp. All such root sections separated from the actual trees are labelled 'Stigmaria'

Photo title: Stigmaria. Overview of root and matrix

Taxa present: Stigmaria

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This shows the matching root and side rootlet scars in the matrix for this Stigmaria.

Photo title: Stigmaria and rootlets in matrix

Taxa present: Stigmaria

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Grand Ledge, Eaton, MI

Strat unit: Saginaw formation

Submitter notes: This shows the root matched to the matrix showing the traces of the rootlets penetrating the matrix.

Photo title: Stigmaria root

Taxa present: Stigmaria

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