Submitted on 2009-06-03 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows the crinoid calyx on a dark background to emphasize detail.

Photo title: Dolatocrinus triangulatus

Taxa present: Dolatocrinus triangulatus

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Showing tegman.

Photo title: Dolatocrinus triangulatus

Taxa present: Dolatocrinus triangulatus

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This tabulate coral attaches around the stem of crinoids which is believed to keep them off the substrate. These are delicate corals and there are fronds of Bryozoan in the coralite cups but are NOT part of the Antholites. This is from the same Thunder Bay Limestone locality for the Dolatocrinus just shown and collected the same day. This does look a bit like a Mayan god of rain!

Photo title: Antholites alpenensis

Taxa present: Antholites alpenensis

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Another view of the reverse side of coral just shown. Again this is with a dark background to highlight detail of the coral. A bit of the crinoid stem is visible at the top of the image

Photo title: Antholites alpenensis

Taxa present: Antholites alpenensis

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This view shows the crinoid stem and the thickness of the corals which are comparatively thin. The coral is 3/4' or 20 mm by 3/4' or 20 mm by 1/4' or 7 mm thick. I am sure many of my friends in FUMMP have better examples of this unusual coral they could show.

Photo title: Antholites alpenensis

Taxa present: Antholites alpenensis

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): , Presque Isle, MI

Strat unit: Bell formation

Submitter notes: Small complete crinoid Calyx from the Bell Shale at Rockport Quarry. The ornamented calyx is 3/4' or 20 mm by 3/4' or 20 mm but is a bit flattened.

Photo title: Gennaeocrinus variabilis

Taxa present: Gennaeocrinus variabilis

View full record

Submitted on 2009-06-03 by David Thompson

Location (approximate): , Presque Isle, MI

Strat unit: Bell formation

Submitter notes: The base of the Gennaeocrinus showing the stem attachment and the characteristic 'flange' around the stem.

Photo title: Gennaeocrinus variabilis

Taxa present: Gennaeocrinus variabilis

View full record

Submitted on 2009-05-18 by David Thompson

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: Bottom view showing concentric layers of Bryozoa building the colony

Photo title: Fistuliporoid sp.

Taxa present: Fistulipora

View full record

Submitted on 2009-05-18 by David Thompson

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A large encrusting Bryozoan colony showing the individual bryozoa and the spaced bumps over the colony. A USA 25 cent piece is for scale. The whole colony is 3' (7.5 cm) by 2.5' (6.5 cm) by 2' (5 cm). There has been some question as to this being a sponge.

Photo title: Fistuliporoid sp.

Taxa present: Fistulipora

View full record

Submitted on 2009-05-05 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This large Platyceras has one of it\\\'s spines still attached. The \\\'snail\\\' itself is 1 & 3/4\\\'(4.5 cm) high by 1 & 1/2\\\'(3.8 cm) wide at the base. The spine is 3/4\\\' (2.0 cm) long. This from the Alpena Limestone and another I have on this site is from Hungry Hollow in Canada.

Photo title: Platyceras rarispinum

Taxa present: Platyceras rarispinum

View full record

Submitted on 2009-05-05 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A different view of the Platyceras showing the tightly coiled conch and the expansion of the shell. The Spine is in the background

Photo title: Platyceras rarispinum

Taxa present: Platyceras rarispinum

View full record

Submitted on 2009-04-12 by Joseph Kchodl

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: Two nice specimens of a common braciopod in this formation. These specimens are approximately 10mm wide.

Photo title: Brachiopods

Taxa present: Cyrtina alpenensis

View full record

Submitted on 2009-04-12 by Joseph Kchodl

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: Two typical specimens of the branching coral. The larger specimen measures 38.5mm high and 15.2mm at the widest branch. The smaller measures 17.4mm tall and 14.7mm at the widest.

Photo title: Coral

Taxa present: Trachypora alternans

View full record

Submitted on 2009-04-12 by Travis Vivian

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Placoderm (armored fish) median dorsal plate measuring 49.5mm long by 31.6mm at the widest point.

Photo title: Arthrodire Fish Plate

Taxa present: Protitanichthys rockportensis

View full record

Submitted on 2009-04-12 by Travis Vivian

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Placoderm (armored fish) jaw plate measuring 83.9mm long by 25.7mm at the widest point.

Photo title: Arthrodire Jaw

Taxa present: Protitanichthys rockportensis

View full record

Submitted on 2009-04-12 by Travis Vivian

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Placoderm (armored fish) jaw plate measuring 148.6mm long by 36.0mm at the widest point.

Photo title: Arthrodire Jaw

Taxa present: Protitanichthys rockportensis

View full record

Submitted on 2009-04-12 by John Benson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Surface collected between the clay pit and river at Hungry Hollow. It measures 31mm long.

Photo title: Trilobite

Taxa present: Monodechenella macrocarpa

View full record

Submitted on 2009-04-12 by John Benson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Two fine specimens on a large Strophomenid brachiopod. Surface collected from the spoil piles at Milan. Note coin for size.

Photo title: Inarticulate Brachiopods

Taxa present: Petrocrania hamiltonae

View full record

Submitted on 2009-04-12 by John Benson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Three specimens surface collected from the spoil piles at Milan. The largest is 10mm wide.

Photo title: Brachiopods

Taxa present: Cyrtina sp.

View full record

Submitted on 2009-04-12 by John Benson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Two specimens in matrix surface collected at the spoil piles at Milan.

Photo title: Tentaculites

Taxa present: Tentaculites sp.

View full record