Submitted on 2011-11-05 by David Thompson

Location (approximate): Paulding, Paulding, OH

Strat unit: Dundee formation

Submitter notes: Rostroconch after preparation & cleaning. This unusual fossil was shown before cleaning on this site.

Photo title: Conocardium cuneus

Taxa present: Conocardium cuneus

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Paulding, Paulding, OH

Strat unit: Dundee formation

Submitter notes: A slightly different view emphasizing the structure of the shell. A U.S. ten cent piece is for scale.

Photo title: Conocardium cuneus from the Dundee Fm., Paulding Co. OH

Taxa present: Conocardium cuneus

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is the tiniest complete Eldredgeops (Phacops) trilobite I have seen or found. The eyes are so tiny I can not determine the species although it did come from Sylvania, Ohio. It is complete but only a few millimeters long as seen by the comparison with the U.S. Ten cent piece next to it. Far rarer then the larger trilobites this site is famous for.

Photo title: A very tiny Eldredgeops (Phacops) trilobite

Taxa present: Eldredgeops

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Again shown with a dime for scale. This is the negative to the positive of the little trilobite shown in previous photo.

Photo title: The negative counterpart for the tiny Eldredgeops in the previous photo

Taxa present: Eldredgeops

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows to good effect the varied decorations on the calyx of this species of Megistocrinus. This very large Caylx comes from Partridge Point in Alpena. Unfortunately the entire opposite side is covered with a very hard limey Bryazoan that completely obscures it and only this side, bottom and tegmen could be cleaned and seen.

Photo title: Large Caylx of Megiatocrinus multidecoratus from Alpena

Taxa present: Megistocrinus multidecoratus

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows a slightly different view with natural coloring to show the decorations.

Photo title: A differing view of the Megistocrinus

Taxa present: Megistocrinus multidecoratus

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This species of Brachiopod, Leiorhynchus kelloggi, from the silica shale often has significant amounts of the original nacre or Mother of Pearl still visible and sparkling after 375 Million years. This example from Milan, Michigan has a large amount of the original shell still shining after all these millions of years!

Photo title: A Silica Brachiopod with iridescent nacre.

Taxa present: Leiorhynchus kelloggi

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Submitted on 2011-11-05 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This shows the brachiopod with a U.S. ten cent piece for scale.

Photo title: Another view of same brachiopod

Taxa present: Leiorhynchus kelloggi

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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: 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 2012-07-04 by David Thompson

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This is a large example of Tentaculities at 2 cm (.78 inches) from the Silica formation of Paulding, Ohio. These are not too common at Paulding and this is a larger then average specimen.

Photo title: Large Tentaculities from Silica of Ohio

Taxa present: Tentaculities scalariformis

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Rockport, Alpena, MI

Strat unit: Bell formation

Submitter notes: This species, Gennaeocrinus variables, which is very tiny, 1.176 cm (0.69 inches), can still be host to a snail as a rare parasite(?). The gastropod is too tiny for good species identification and is covered with bryozoan. Alex Fabian was generous to give me these from the Tom Witherspoon, Sr. collection knowing my interest in these Crinoid/snail association

Photo title: Tiny crinoid with gastropod attached to tegmen

Taxa present: Gennaeocrinus variabilis, Platyceras

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Rockport, Alpena, MI

Strat unit: Bell formation

Submitter notes: This crinoid is 1.03 cm, (.40 inches) wide by .84 cm ( .33 inches) high. The snail is .91 (35 inches) long. The crinoid is the size of a large pea! These are from the Bell Shale at Rockport, Mi North of Alpena.

Photo title: A different example of tiny crinoid and snail.

Taxa present: Gennaeocrinus variabilis, Platyceras

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Rockport, Alpena, MI

Strat unit: Bell formation

Submitter notes: These additional three Genneaocrinus all have partial snails attached to their tegmens. Due to the partial status these are put together rather then showcased individually. All these were from the same source in the Bell shale

Photo title: A set of three Small crinoid calyxes with fragments of snail attachments

Taxa present: Gennaeocrinus variabilis, Platyceras

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This nice complete crinoid calyx in matrix shows tegmen ornamentation as well as arm attachments for this Pithocrinus cooperi. The crinoid is 1.37 inches,(3.12 cm) high by 1.38 inches,(3.5 cm) wide. The matrix is 2.71 inches, (6.8 cm) wide by 3.2 inches, (8.1 cm) long

Photo title: Complete crinoid calyx

Taxa present: Pithocrinus cooperi

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This complete crown although it was broken half way up was easily put back together with no loss. The crown with arms is 3 inches, (7.5 cm) high by 1.57 inches, (4. cm) wide. A ten cent piece is for scale.

Photo title: Complete Crinoid Crown, side 1

Taxa present: Pithocrinus cooperi

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is the opposite side of the previous crinoid. The same dimensions apply.

Photo title: Reverse side

Taxa present: Pithocrinus cooperi

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This nice large calyx shows the varied ornamentation that leads to the name 'multidecoratus'

Photo title: ornamented crinoid calyx

Taxa present: Megistocrinus multidecoratus

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Submitted on 2012-07-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Partridge Point formation

Submitter notes: This view of the Tegmen of a Megistocrinus rugosus shows the base of a platyceras snail but it also has been called a fragment of an inarticulate brachiopod. In either case the majority of the attached specimen was scraped off during its many millions of years underground. What's your opinion?

Photo title: Crinoid tegmen with fragment of snail(?)

Taxa present: Megistocrinus rugosus, Platyceras

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