Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This uncommon brachiopod requires a bit of searching in the formation. The photo specimens average 18mm x 16mm and are about12mm thick.

Photo title: Brachiopod

Taxa present: Parazyga hirsuta

View full record

Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This brachiopod is not common in the formation. A very fragile thin shell makes collecting whole specimens difficult. This beauty has a holdfast attached to it and nearby rests a smaller Pholidostrophia brachiopod. The larger brachiopod measures 35mm x 31mm.

Photo title: Brachiopod

Taxa present: Protoleptostrophia perplana, Pholidostrophia nacrea

View full record

Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A small brachiopod with a distinctive triangular shape that is common in the formation. The largest of the 11 specimens in the photo measures 11mm x 7mm and is 9.5mm high. The smallest is 4mm x 5.5mm and 4mm high.

Photo title: Brachiopod

Taxa present: Cyrtina coultisorum

View full record

Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This small brachiopod is rare in the formation except in certain horizons. The average size in the photo is 13mm x 8mm tall.

Photo title: Brachiopod

Taxa present: Cyrtina arkonensis

View full record

Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This un-described plant material can occur throughout the exposed Arkona Formation but is more common in certain horizons. Plump specimens are needed to show internal cell structure upon sectioning. In the photo, the widest specimen measures 25mm wide x 32mm long. The longest specimen is 42mm long x 17mm wide.

Photo title: Fossil Wood

Taxa present: Unknown sp.

View full record

Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This website contains photos of beautifully preserved Decorocrinus crowns. This pair of partial crowns shows the nature of the ornamentation on the calyx. The pair of crowns covers an area measuring 42mm x 38mm.

Photo title: Partial Crinoid Crowns

Taxa present: Decorocrinus arkonensis

View full record

Submitted on 2008-04-28 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is 6.5 cm top to bottom.

Photo title: Pelecypod

Taxa present: Limoptera macroptera

View full record

Submitted on 2008-04-27 by ummp invertebrate paleontology

Location (approximate): Thedford, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This slab of cephalopods ia approximately 20 cm across. It is probably one of the rarest fossils in the Arkona Fm. Fortunately, this slab is in the university collection.

Photo title: Cephalopds

Taxa present: Arkonoceras arkonense

View full record

Submitted on 2008-04-28 by ummp invertebrate paleontology

Location (approximate): Rogers City, Presque Isle, MI

Strat unit: Rogers City formation

Submitter notes: This specimen is the interior mold of a pelecypod. The specimen is 12 cm across. It is a hypotype.

Photo title: Pelecypod

Taxa present: Liromytilus attenuatus

UMMP specimen number: hypotype 23921

View full record

Submitted on 2008-04-28 by ummp invertebrate paleontology

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This specimen is the holotype for the species, It is 7.5 cm across the slab.

Photo title: Trilobites

Taxa present: Phacops iowensis southworthi

UMMP specimen number: holotype 24313

View full record

Submitted on 2008-04-28 by ummp invertebrate paleontology

Location (approximate): , Alpena, MI

Strat unit: Genshaw formation

Submitter notes: The average size of these specimens is 7 cm across. These specimens are homeotypes.

Photo title: Corals

Taxa present: Pinnatophyllum scyphus

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: Traverse formation

Submitter notes: This large branching coral colony was found in many pieces in the ditch near the cemetery in Alpena, MI This was painstakingly re-assembled and restored by Scott Vergiels of the 'Friends'

Photo title: A Branching Coral Colony

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: 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 2008-05-12 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This shows the opposite view of Strophodonta demissa with some small Bryozoan, Hederella concinnoides, growing on it.

Photo title: Opposite view of Brachiopod

Taxa present: Strophodonta demissa, Hederella concinnoides

View full record

Submitted on 2008-05-13 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This series shows two species of Pelecypods from the Silica formation from several angles to show their structure but this is not too exciting to view. The Silica bivalves generally are casts or Steinkerns with little shell other then thin phosphatic layers and as such are overlooked. Here are two similar species distinguished mostly by size. The larger is nodocostata and the smaller is sylvaniensis. The smaller is 2' long by 1 1/4' wide (5 X 3 cm). The larger is 2 1/4' long by 2' wide by 1 1/2' high (5.5 X 5 x 3.5 cm).

Photo title: Silica Pelecypods

Taxa present: Grammysia sylvaniensis, Grammysia nodocostata

View full record