Submitted on 2026-01-14 by Mike Palescuk

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The opposite side of the large nautiloid endocast with encrusting coral Aulopora. This specimen measures 7.75 inches in diameter and is 3 inches thick.

Photo title: Nautiloid

Taxa present:

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Submitted on 2026-01-14 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: None

Photo title: Nautiloid Cephalopod - Curved

Taxa present: Cephalopoda

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Submitted on 2026-01-13 by Mike Palescuk

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: A large cephalopod (nautiloid) endocast with epifauna. This specimen measures 7.75 inches in diameter and is 3 inches thick. It has a Bryozoan, Hederella, on lower left of it's living chamber and the coral Aulopora on the septae (right side).

Photo title: Nautiloid

Taxa present:

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Submitted on 2025-12-01 by James Musolf

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This is a great example of a rare Michigan trilobite!

Photo title: Michigan trilobite

Taxa present:

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Submitted on 2025-11-30 by James Musolf

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This is an extremely rare crinoid, This is one of if not the only one of this species ever found at this site.

Photo title: Crinoid crown

Taxa present: Devonochonetes fragilis, Decadocrinus hughwingi

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Submitted on 2025-11-30 by James Musolf

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A great example of a rare Michigan trilobite Pseudodechnella witherspooni,

Photo title: Trilobite

Taxa present:

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Submitted on 2025-11-05 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: None

Photo title: Coral and Blastoids

Taxa present: Heliophyllum halli, Heteroschisma subtrunctatum

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: The trilobite is 4.3 cm tall

Photo title: Trilobite with Brachiopod

Taxa present: Eldredgeops milleri, Strophodonta sp.

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The crown of the crinoid is 5 cm tall.

Photo title: Crinoid and Trilobite

Taxa present: Eldredgeops milleri, Arthroacantha carpenteri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: The trilobite is 4.7 cm.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This trilobite is 5.2 cm tall.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This trilobite is 5.7 cm across.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This specimen is 5.3 cm tall.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: These two trilobites are in the position as found and on the matrix they were found in. Both can be removed for examination and placed back into their natural setting. It is 6.5 cm across the two specimens.

Photo title: Trilobites

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This trilobite is 7.7 cm which is considered quite large.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The trilobites measure 1.8 cm each.

Photo title: Trilobites

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: One of the largest trilobites found at this site. The trilobite measures 5.3 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: And another large specimen. This specimen measures 4.7 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: These guys are each about a inch long.

Photo title: Pair of trilobites

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes:

Photo title:

Taxa present: Eldredgeops rana

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