Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This great combination has a placoblastus measuring 32mm high and 22mm in diameter at it's widest. The crinoid measures 49mm in diameter and 28mm high.

Photo title: Blastoid and Crinoid Pair

Taxa present: Megistocrinus multidecoratus, Placoblastus obovatus

View full record

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This great combination has a placoblastus measuring 32mm high and 22mm in diameter at it's widest. The crinoid measures 49mm in diameter and 28mm high.

Photo title: Blastoid and Crinoid Pair

Taxa present: Placoblastus obovatus, Megistocrinus multidecoratus

View full record

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This blastoid theca measures 22mm high x 9mm wide.

Photo title: Blastoid

Taxa present: Hyperoblastus bassleri

View full record

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Two blastoids are nearly identical in size. Both are 26mm high. The specimen on the right is 1mm wider at 15mm. That specimen also displays a sign of excellent preservation with one of it's top pointed plates still in place.

Photo title: Blastoids

Taxa present: Hyperoblastus bassleri

View full record

Submitted on 2008-03-22 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This beautiful specimen is very large, being about 30 cm in length. It is a paratype.

Photo title: Coral

Taxa present: Cystiphylloides americanum elongatum

UMMP specimen number: paratype 35282

View full record

Submitted on 2008-03-22 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: A beautiful colony that is 12 cm across. Photos do not do this grouping justice.

Photo title: Coral colony

Taxa present: Cylindrophyllum sp.

View full record

Submitted on 2008-03-22 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This blastoid is 3.5 cm tall.

Photo title: Blastoid

Taxa present: Placoblastus obovatus

View full record

Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This crinoid is 10 cm including the stem.

Photo title: Crinoid

Taxa present: Dolatocrinus sp.

View full record

Submitted on 2008-05-11 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: A complete coral head for the Spongophyllum alpenense species,similar to the famous 'Petoskey'stone,(Hexagonaria sp.) when these are water worn or polished. This is the natural fossil with unworn coralites as it was buried in sediment and preserved in detail.

Photo title: Spongophyllum alpenense, Coral head

Taxa present: Spongophyllum alpenense.

View full record

Submitted on 2008-05-11 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: This is a side view of the Spongophyllum alpenense

Photo title: Another view of same coral head

Taxa present: Spongophyllum alpenense.

View full record

Submitted on 2008-05-11 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: Closeup view of Spongophyllum alpenense coral showing detail of coralites. There are several Bryozoan colonies upon the same coral head. The coral is about 9'(22.8 cm) by 7' (17.7 cm) by 4 1/2' (11.4 cm) thick and weighs 8 1/2 lb or 3.85 Kg. This was removed from soft clay at the Potter Farm location in Alpena.

Photo title: Detail of coralites

Taxa present: Spongophyllum alpenense.

View full record

Submitted on 2008-05-11 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes:

Photo title: very detailed view of coralites

Taxa present: Spongophyllum alpenense.

View full record

Submitted on 2008-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: Another view of this large coral. The coral is 8'(20.5 cm)high by 9 1/2' (24. cm) wide. In the first view hand gives scale. In this a USA 25 cent piece is used.

Photo title: Another view of same branching coral,

Taxa present: Cystiphylloides petoskeyenes (potterenes?)

View full record

Submitted on 2008-05-12 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: This shows opening and internal structure of coral. This opening is 2' (5. cm) across.

Photo title: View of individual coralite,

Taxa present: Cystiphylloides petoskeyenes (potterenes?)

View full record

Submitted on 2008-07-19 by ummp invertebrate paleontology

Location (approximate): , Alpena, MI

Strat unit: Norway Point formation

Submitter notes: The specimen is 1.7 cm across.

Photo title: Brachiopod

Taxa present: Pholidostrophia ovata

View full record

Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This closeup shows the tegmen to advantage

Photo title: Another view of the same Crinoid

Taxa present: Dolatocrinus liratus

View full record

Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Collected in 1994, Ken had many years to enjoy this wonderful example of Megistocrinus before he died a few years ago. We collected this at Partridge Point in Alpena and the crinoid was completely covered with bryozoans that can still be seen covering the plate. Ken, at the time, was not optimistic about how this would turn out and until it was cleaned by Scott Vergiels, he did not know what a treasure he had.

Photo title: This magnificent complete crinoid was the pride of Ken Dobson's collection

Taxa present: Megistocrinus nodosus

View full record

Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This example of a complete Dolatocrinus shows all the parts in the round. Two arms are missing but this allows the tegmen to be seen.

Photo title: A beautiful complete crinoid in matrix with stem and arms.

Taxa present: Dolatocrinus liratus

View full record

Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This large Placoblastus blastoid is in matrix and slightly crushed.

Photo title: Large Devonian blastoid from Alpena, MI

Taxa present: Placoblastus obovatus

View full record

Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows two additional blastoids free of matrix but weathered somewhat.

Photo title: Two additional blastoids from Alpena, MI

Taxa present: Placoblastus obovatus

View full record