Submitted on 2019-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: None

Photo title: Detail of previous specimen showing ambulacra.

Taxa present: Placoblastus obovastus

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Submitted on 2019-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: showing attachment area.

Photo title: stem end of previous Blasted photo

Taxa present: Placoblastus obovastus

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Submitted on 2019-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: attached to matrix

Photo title:

Taxa present: Placoblastus obovastus

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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 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 2019-05-12 by David Thompson

Location (approximate): Antwerp, Paulding, OH

Strat unit: Dundee formation

Submitter notes: injured Rostroconch that healed and grew.

Photo title: Deformed Rostroconch

Taxa present: Conocardium coneus

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Submitted on 2018-12-25 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: The top crinoid is about 3 cm tall. Crinoids are very rare at the Paulding site compared to the Sylvania site. Very few complete crowns have been found.

Photo title: Crinoid

Taxa present: Proctothylacocrinus sp.

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Submitted on 2018-12-15 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Specimen is about 3 cm across. It is rare to find these inflated.

Photo title: Pelecypod

Taxa present: Mytilarca cordata

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Submitted on 2018-12-15 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: The specimen is 1.5 cm across.

Photo title: Pelecypod

Taxa present: Paracyclas lirata

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Submitted on 2018-12-13 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: Identification of this specimen is based on a 1876 publication by Rominger. The coral is 10.5 cm tall.

Photo title: Coral

Taxa present: Striatopora rugosa

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Submitted on 2018-07-06 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Dundee formation

Submitter notes: 4 cm across the matrix.

Photo title: Rostroconch

Taxa present: Hippocardia sp.

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Submitted on 2018-06-12 by Michael Lask

Location (approximate): Port Sanilac, Sanilac, MI

Strat unit: Amherstburg formation

Submitter notes: These little pieces of Petoskey stone were collected decades ago on the rocky shores of Lake Huron. They are exactly as found, naturally polished and aged. The larger fragment is 36 mm across. Hexagonaria was a genus of reef forming tabulate coral. Tabulate corals are extinct. Enormous reefs formed in what was Michigan during the Devonian period.

Photo title:

Taxa present: Hexagonaria percarinata

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Submitted on 2018-06-09 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A very rare crinoid. The calyx is 1 cm across.

Photo title: Crinoid

Taxa present: Deltacrinus sp.

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Submitted on 2018-06-09 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A plate with four crinoid clayxes. It is 16 cm across the slab.

Photo title: Crinoids

Taxa present: Gilbertsocrinus ohioensis

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Submitted on 2018-06-09 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: The crinoid is 2.5 cm tall. Another very rare crinoid.

Photo title: Crinoid

Taxa present: Melocrinus

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Submitted on 2018-06-09 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: It is 24 cm across the slab.

Photo title: Corals

Taxa present: Heterophrentis simplex

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Submitted on 2018-06-09 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: The slab is 30 cm across.

Photo title: Corals, bryzoans, and brachs, OH My

Taxa present: Heterophrentis simplex, Sulcoretepora sp., Strophodonta sp., Aulopora microbuccinata

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Submitted on 2018-03-13 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This crinoid is 1.1 cm tall.

Photo title: Crinoid calyx

Taxa present: Atractocrinus concinnus

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Submitted on 2018-03-13 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Norway Point formation

Submitter notes: The brachiopod is 2.7 cm across.

Photo title: Brachiopod

Taxa present: Spinocyrtia clintoni

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Submitted on 2018-03-06 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This specimen is 5.7 cm across.

Photo title: Pelecypod

Taxa present: Mytilarca cordata

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