Submitted on 2011-08-21 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: This trace fossil is from the Squaw Bay formation of Alpena and is part of a larger piece. These trace fossils are attributed to a variety of causes from plant or algae fronds to worm feeding activity. The consensus seems to be for the systematic feeding activity of marine worms. This piece is about 18 inches long by 8 inches wide. A twelve inch ruler is for scale.

Photo title: 'rooster-tail' Trace Fossil, Zoophycos

Taxa present: Zoophycos

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Submitted on 2011-08-21 by David Thompson

Location (approximate): Jackson, Jackson, MI

Strat unit: Marshall formation

Submitter notes: This is the interior of a small section of nautiloid, probably Mooreoceras, that shows the Siphuncle and straight septa of the nautiloid. The piece is less then 1 inch or 2. cm

Photo title: Interior of small Nautiloid

Taxa present: Mooreoceras

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Submitted on 2011-08-21 by David Thompson

Location (approximate): Jackson, Jackson, MI

Strat unit: Marshall formation

Submitter notes: This is a small fragment of Ammonite from the Marshall sandstone. The internal whorl is visible but only a few of the simple sutures can be seen in the center making species identification difficult. The entire specimen is less then an inch across. A partial cast of the Pelecypod, Palaeoneilo sulcatina, is below the Ammonite.

Photo title: Ammonite

Taxa present: Ammonite , Palaeonnello sulcatina

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Submitted on 2011-08-21 by David Thompson

Location (approximate): Jackson, Jackson, MI

Strat unit: Marshall formation

Submitter notes: This piece has several Pelecypods,Palaeoneilo sulcatina, and nautiloids, Mooreoceras sp. as well as a fragment of gastropod in the center. The entire cluster is 3.4 inches or 8.6 cm wide

Photo title: Cluster of pelecypods, nautiloids

Taxa present: Palaeoneilo sulcatina, Mooreoceras marshallense, Gastropod

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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): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: Although noted for nautiloids and especially ammonites, the Squaw Bay formation contains pieces of unknown wood. This is an example of wood preserved in the dense matrix and is about 6 inches long.

Photo title: Wood in Squaw Bay matrix

Taxa present: Wood

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: This photo shows the wood from the previous photo with it's counter half in the hard matrix since they split while being collected.

Photo title: Second wood example

Taxa present: Wood

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is another tiny pyritized crinoid from the Silica shale showing 11. mm of stem into cup that is 10.7 mm wide. The protective spines of this species did not protect it from the gastropod (possibly bucculentum sp.) from getting onto the tegmen.

Photo title: Crown of Gilbertsocrinus ohioensis with gastropod

Taxa present: Gilbertsocrinus ohioensis, Platyceras bucculentum

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Submitted on 2011-08-14 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This photo shows the complete piece with a US ten cent piece for scale.

Photo title: Second view of Gilbertsocrinus

Taxa present: Gilbertsocrinus ohioensis, Platyceras bucculentum

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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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Submitted on 2011-08-11 by Peter Lee

Location (approximate): Arkona, Lambton, ON

Strat unit: Hamilton formation

Submitter notes: Primitive Early Shark teeth from Middle Devonian Omalodus grabaui (Hussakof & Bryant, 1918). Specimen was identified by Dr. Michal Ginter (Poland) Found in the South Pit.... Limestone blocks had fallen from high strata to the floor of the pit. 28 Frames stacked with Helicon Focus: 4x plan objective + Nikon 995 + polarizer... approx 64X magnification. Base of the Teeth approx 4mm span.

Photo title: Primitive Early Shark teeth from Middle Devonian Omalodus grabaui

Taxa present: Omalodus grabaui

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: The upper pelecypod is 3 cm across.

Photo title: Pelecypod

Taxa present: Palaeoneilo sulcatina

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: The pelecypod specimen is 3.6 cm across.

Photo title: Pelecypod

Taxa present: Nuculopsis sp.

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: The pelecypod is 3 cm across.

Photo title: Pelecypod

Taxa present: Palaeoneilo sulcatina

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: The cephalopod is 4.4 cm across.

Photo title: Cephalopod

Taxa present: Mooreoceras marshallense

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: The pelecypod is 3.5 cm across.

Photo title: Pelecypod

Taxa present: Palaeoneilo sulcatina

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Submitted on 2011-08-05 by Joseph Koniecki

Location (approximate): , Jackson, MI

Strat unit: Marshall formation

Submitter notes: This specimen is 10.3 cm acroos the entire plate.

Photo title: Pelecypods

Taxa present: Palaeoneilo sulcatina

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Submitted on 2011-08-03 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: This specimen is 10.5 cm across.

Photo title: Cephalopod

Taxa present: Michelinoceras sp.

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Submitted on 2011-08-03 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: This specimen is 11.5 cm across.

Photo title: Cephalopod

Taxa present: Michelinoceras sp.

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