Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This Megistocrinus shows some wear and tear with a number of nodes damaged. It is 3 cm thick by 5. cm wide.

Photo title: Crinoid calyx

Taxa present: Megistocrinus nodosus

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Two different sizes of the same species. The larger is in the previous photo, the small one is 3 cm thick by 5. cm wide.

Photo title: Big and small Megistocrinus nodosus

Taxa present: Megistocrinus nodosus

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This is a nice crown with the calyx 3.8 cm wide and 2.8 cm deep. The overall crown is 8.1 cm long with nice arm definition

Photo title: Crinoid crown

Taxa present: Pithocrinus cooperi

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This small Brachiopod has two inarticulates. This is the ventral (bottom) side with the scar of a Petrocrania species showing.

Photo title: Strophodonta brachiopod with two inarticulates!

Taxa present: Strophodonta demissa

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This is the brachial (top) valve with an intact Petrocrania hamiltonae snugly in place. It is unusual to have inarticulates on both valves of a brachiopod.

Photo title: The other side of the previous brachiopod

Taxa present: Strophodonta demissa

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: A nice big articulate brachiopod that is 5.4 cm wide and 4.6 cm long. Just visible on the hinge line is an inarticulate brachiopod shown in the next picture.

Photo title: Large Brachiopod

Taxa present: Megastrophia concava

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Submitted on 2019-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Contrast in size of blastoids from same formation.

Photo title: Small & large of same species.

Taxa present: Placoblastus obovastus

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Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: These inarticulates, the largest being Petrocrania hamiltonae, and 1.5 cm, are out of the way at the back of the big Megastrophia. The tiny ones are .76 mm and are in the Philhedra family but they may be stewerti or crenistriata sp., it is hard to tell.

Photo title: Multiple Inarticulates hiding out on the hinge line.

Taxa present: Megastrophia concavus

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: Picture 2 is a close-up of the Trilobite.

Photo title: Trilobite

Taxa present: Greenops widderensis

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Submitted on 2019-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: details of Ambulacra

Photo title:

Taxa present: Placoblastus obovastus

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This was collected and prepared by Dan Edmondson during the Summer of 2012. The specimen is 39 mm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: The Trilobite is 32 mm long. The Brachiopods are Muscrospirifer thedfordensis. Collected and prepared by Dan Edmondson. Picture 1 is of the entire plate

Photo title: Trilobite

Taxa present: Greenops widderensis

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 102 mm from top of the arms to the bottom of the calyx. Collected and prepared by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Arthroacantha carpenteri

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: 29 mm from bottom of the calyx to the top of the arms. Collected by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Dolatocrinus asterias

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 134 mm from bottom of the stem to the top of the arms. Collected by Pat Rutkowski. Picture 1 features the entire plate.

Photo title: Crinoid

Taxa present: Decadocrinus hughwingi

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Picture 2 featuring a close-up of the crown.

Photo title: Crinoid

Taxa present: Decadocrinus hughwingi

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 61 mm long. Collected by Mike Palescuk in 2013. Prepared by Dan Edmondson. Bottom right image is the unprepared part and counter-part. Negative on the bottom.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: I found these on April 14, 2012. They are both about 35 mm across the cephalon. The top picture is what they looked like fresh from the quarry. Below is after being prepared by David Clark.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 120 mm across

Photo title: Fish

Taxa present: Protitanichthys sp.

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Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 89 mm long Collected and prepared by Patricia Rutkowski.

Photo title: Phyllocarid

Taxa present: Rhinocaris ehlersi

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