Submitted on 2010-11-26 by Alex Fabian

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: An oral view of an excellent 'undescribed' specimen from what used to be the 'Dock Street Clay' This blastoid measures 20mm X 13mm.

Photo title: BLASTOID

Taxa present: Hyperoblastus sp.

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Submitted on 2010-11-26 by Alex Fabian

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A side view of an excellent 'undescribed' specimen from what used to be the 'Dock Street Clay' The blastoid measures 20mm X 13mm.

Photo title: BLASTOID

Taxa present: Hyperoblastus sp.

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Submitted on 2010-11-26 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: A side view of a Heteroschisma blastoid from the Genshaw member. The specimen measures 9.25mm tall and 7.1mm in diameter. This photo was taken under a stereozoom microscope.

Photo title: BLASTOID

Taxa present: Heteroschisma sp.

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Submitted on 2010-11-26 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: An oral view of a Heteroschisma blastoid from the Genshaw member. The specimen measures 9.25mm tall and 7.1mm in diameter. This photo was taken under a stereozoom microscope.

Photo title: BLASTOID

Taxa present: Heteroschisma sp.

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This crushed(see next photo entry for crushed side) example is to show what a blastoid in this condition might look like. It is 11.5 mm high by 9.8 mm wide at the widest. This was collected in 1991 from the Martin-Marietta spoil piles in Milan, MI where blastoids are far more rare then, for example, at Paulding, OH.

Photo title: Crushed and Incomplete Example of Hyperoblastus reimani from Milan, MI

Taxa present: Hyperoblastus reimanni

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This crushed example is to show what a blastoid in this condition might look like. It is 11.5 mm high by 9.8 mm wide at the widest. This was collected in 1991 from the Martin-Marietta spoil piles in Milan, MI where blastoids are far more rare then, for example, at Paulding, OH.

Photo title: Crushed and Incomplete Example of Hyperoblastus reimani from Milan, MI View 2

Taxa present: Hyperoblastus reimanni

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This is a not too good example of this rare and unusual blastoid. Eleutherocrinus cassedayi from the Hungry Hollow formation at the 'tileyard' at Thedford, Ontario, Canada. The blastoid is 17 mm long and 9 mm wide.Better examples are shown on this website but these are so rare that all examples should be looked at and any partial collected.It is believed that these blastoids were not attached as adults and able to move independently.

Photo title: Eleutherocrinus cassedayi

Taxa present: Eleutherocrinus cassedayi

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This is a not too good example of this rare and unusual blastoid. Eleutherocrinus cassedayi from the Hungry Hollow formation at the 'tileyard' at Thedford, Ontario, Canada. The blastoid is 17 mm long and 9 mm wide.Better examples are shown on this website but these are so rare that all examples should be looked at and any partial collected.It is believed that these blastoids were not attached as adults and able to move independently.

Photo title: Eleutherocrinus cassedayi view 2

Taxa present: Eleutherocrinus cassedayi

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: An oral view of one of the tiny blastoids collected from the Upper Genshaw of Alpena. The specimen is 5.72 mm tall. These tiny blastoids are in weathered black shales and are very difficult to find in the huge Lafarge Quarry in Alpena. This photo was taken under a stereozoom microscope.

Photo title: Undescribed Heteroschisma blastoid

Taxa present: Heteroschisma sp.

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: These tiny blastoids are collected from the Upper Genshaw of Alpena. The smallest is 5 mm and the largest is 5.72 mm. Two grains of rice are added for scale and the rice is 7.2 mm long. These tiny blastoids are in weathered black shales and are very difficult to find in the huge Lafarge Quarry in Alpena.

Photo title: Undescribed Heteroschisma blastoids

Taxa present: Heteroschisma sp.

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Some examples of this blastoid from the Hungry Hollow member of the Arkona area. The largest is 11.2 mm long. Another shows ventral view with ambulacra. Not all of these were collected at the same time, some are years apart.

Photo title: Heteroschisma canadensis

Taxa present: Heteroschisma canadensis

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Whitmore Lake, Washtenaw, MI

Strat unit: Traverse formation

Submitter notes: Various brachiopod fragments collected by Justin Florkowski, an 11 year-old member of the 'FRIENDS'. This specimen found is from glacial drift and measures 57.3mm x 41mm. Probably Traverse group.

Photo title: BRACHIOPOD

Taxa present: Various sp.

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: There is just a bit of the phosphate 'shell' of a conularid to the right of the trilobite molt on this shale. The molt is 11.8mm wide for scale. Collected from the Silica formation at the old Martin-Marietta Quarry near Milan, MI. This photo was taken under a stereozoom microscope.

Photo title: Conularid Fragment with Trilobite Molt

Taxa present: Eldredgeops sp., Conularia ?

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: A close-up view of the phosphate 'shell' of a conularid to the left of the trilobite molt on this shale. The molt is 11.8mm wide for scale. Collected from the Silica formation at the old Martin-Marietta Quarry near Milan, MI. This photo was taken under a stereozoom microscope.

Photo title: Close-up of Conularid Fragment

Taxa present: Conularia ?

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A small blasoid from the Hungry Hollow formation of Middlesex County, Ontario. Theis specimen measures 10 mm long.

Photo title: Hyperoblastus preciosus

Taxa present: Hyperoblastus preciosus

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Submitted on 2010-11-26 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Both of these blastoids were collected from the Mid Devonian, Hungry Hollow formation of Ontario, Canada. The largest is 13.3 mm high by 8 mm wide and collected in 1996. The second smaller is 11.6 mm by 7 mm wide and collected in 1997.

Photo title: 2 Hyperoblastus filosa Blastoids

Taxa present: Hyperoblastus filosa

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Submitted on 2010-11-08 by Travis Vivian

Location (approximate): , Delta, MI

Strat unit: Richmond formation

Submitter notes: This specimen was found on 'dumped rock' near shore of Rapid River. It measures 5.5mm wide X 16mm long.

Photo title: CONULARID

Taxa present: Conularia ? sp.

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Submitted on 2010-11-08 by Travis Vivian

Location (approximate): Newberry, Luce, MI

Strat unit: Colingwood formation

Submitter notes: This specimen was found in glacial drift. It measures 7.5mm wide X 20mm long.

Photo title: CONULARID

Taxa present: Conularia ? sp.

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Submitted on 2010-11-04 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A view showing the ambulacra of two robust large specimens. The blastoid on the left measures 18mm tall and 14mm in diameter. The one on the right measures 16mm tall and 13mm in diameter.

Photo title: BLASTOID

Taxa present: Devonoblastus whiteavesi

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Submitted on 2010-11-04 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A beautiful cluster of eight blastoids on matrix measuring 33mm X 50mm. The blastoid on the far left measures 15mm tall and 10mm in diameter.

Photo title: BLASTOID

Taxa present: Devonoblastus whiteavesi

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