Submitted on 2021-08-16 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Here is closer view of the crown showing charactoristic branching of arms and detail of stem column

Photo title: Detail of crinoid crown

Taxa present: Arthroacantha carpenteri

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Submitted on 2022-08-24 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The muscles of this brachiopod are normally relaxed (closed) at death, but in this speciman the muscles were open.

Photo title: Paraspirifer with open muscle

Taxa present: Paraspirifer bownockeri

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Submitted on 2023-12-03 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Specimen measures about 6-1/2" x 3-1/2". The shell that remains has been preserved with spirorbis (worms) on the outside of the shell and Repteria stolonifera (bryozoan) on the underside.

Photo title: Nephriticeras Cephalopod

Taxa present: Nephriticeras

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Submitted on 2024-01-10 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This trilobite has two pyritized muscle scars from the soft bodied stomach underneath.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2024-02-11 by Michael Lask

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: 55 mm

Photo title: Eldredgeops crassituberculata

Taxa present: Eldredgeops crassituberculata

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Submitted on 2024-03-20 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This brachiopod is encrusted with a peacock colored pyrite and measures 5.0 cm.

Photo title: Pyritized Brachiopod

Taxa present: Paraspirifer bownockeri

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Submitted on 2025-05-30 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The pyritized lophophore is exposed

Photo title: Pyritized Paraspirifer Lophophore

Taxa present: Paraspirifer bownockeri

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Submitted on 2025-05-30 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: None

Photo title: Mucrospirifer encrusted with Bryozoan

Taxa present: Mucrospirifer prolificus, Fistulipora

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Submitted on 2025-06-07 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This speciman is a crusher tooth plate

Photo title: Fish Tooth

Taxa present: ptyctodont

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Submitted on 2025-10-12 by James Musolf

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: None

Photo title:

Taxa present:

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