Currently showing records 21 - 40 of 1730 total

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Bactrite warthini Squaw Bay formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: 44 mm. Collected and prepared by Patricia Rutkowski.

Photo title:

Taxa present: Bactrite warthini

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Arthroacantha carpenteri Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: The plate is 187 mm across. Collected and prepared by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Arthroacantha carpenteri

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Corocrinus nodosus Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: 18 mm. Collected and prepared by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Corocrinus nodosus

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Eutaxocrinus wideneri Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: 26 mm. Collected by Patricia Rutkowski and prepared by Patricia Rutkowski & Joe Koniecki.

Photo title: Crinoid

Taxa present: Eutaxocrinus wideneri

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Platyceras rarispinum Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: 41 mm across. This snail would have been covered in long spines in life. Only the base of the spines are preserved in this specimen. Occasionally the spines are preserved and revealed with very careful preparation.

Photo title:

Taxa present: Platyceras rarispinum

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Hexagonaria percarinatum Amherstburg formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Port Sanilac, Sanilac, MI

Strat unit: Amherstburg formation

Submitter notes: These little pieces of Petoskey stone were collected decades ago on the rocky shores of Lake Huron. They are exactly as found, naturally polished and aged. The larger fragment is 36 mm across. Hexagonaria was a genus of reef forming tabulate coral. Tabulate corals are extinct. Enormous reefs formed in what was Michigan during the Devonian period.

Photo title:

Taxa present: Hexagonaria percarinatum

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Arthroacantha carpenteri Arkona formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: The stem alone is 137 mm long. Collected and prepared by Patricia Rutkowski. This incredible specimen is on a chunk of Arkona Shale that is over 15 inches long. Pat spent countless hours preparing this classic crinoid.

Photo title: Crinoid

Taxa present: Arthroacantha carpenteri

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Eldredgeops milleri Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: 30 mm across the cephalon. This was collected and prepared by Dan Edmondson during the Summer of 2012.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Eldredgeops crassituberculata Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: The largest one is 29 mm across the genal spines. Collected and lightly prepared by Patricia Rutkowski.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Eldredgeops crassituberculata Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Antwerp, Paulding, OH

Strat unit: Silica formation

Submitter notes: 46 mm

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Tentaculites bellulus Arkona formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: 70 mm across

Photo title:

Taxa present: Tentaculites bellulus

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Dunkleosteus sp. Paxton formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Paxton formation

Submitter notes: Dunkleosteus sp., Antrim Shale, Traverse Group, Paxton Quarry, Alpena, Michigan (Devonian) - 326 mm long (over a foot!) This is a section of the left, lower inferognathal element (part of the lower jaw). Collected and prepared by Patricia Rutkowski. She recovered part of it in 1994 and another part in 1998.

Photo title:

Taxa present: Dunkleosteus sp.

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Lingula sp. Antrim formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Antrim formation

Submitter notes: 10 mm long

Photo title:

Taxa present: Lingula sp.

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Paneka sp. Squaw Bay formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: 56 mm. This bivalve (clam!) was collected by Patricia Rutkowski.

Photo title:

Taxa present: Paneka sp.

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Euryocrinus laddii Silica formation Michael Lask

Submitted on 2015-12-20 by Michael Lask

Location (approximate): Berkey, Lucas, OH

Strat unit: Silica formation

Submitter notes: 17 mm. Collected and prepared by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Euryocrinus laddii

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Eutaxocrinus wideneri Silica formation Joseph Koniecki

Submitted on 2015-11-14 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen comes in at 1.7 cm including the stem.

Photo title: Crinoid crown with stem

Taxa present: Eutaxocrinus wideneri

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Melocrinites sp. Silica formation Joseph Koniecki

Submitted on 2015-11-14 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This calyx measure at 1.6 cm including the small portion of arms present. This is a very rare crinoid from the Silica Formation and even more so because it is from the Paulding locality.

Photo title: Crinoid calyx with a bit of arms

Taxa present: Melocrinites sp.

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Charientocrinus bellitubatus Bell formation Joseph Koniecki

Submitted on 2015-11-14 by Joseph Koniecki

Location (approximate): Rockport, Alpena, MI

Strat unit: Bell formation

Submitter notes: This crinoids comes in at the very tiny number of 1 cm which includes the stem.

Photo title: Crinoid crown with stem

Taxa present: Charientocrinus bellitubatus

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Hippocardia cunea Detroit River formation Joseph Koniecki

Submitted on 2015-11-14 by Joseph Koniecki

Location (approximate): Carleton, Monroe, MI

Strat unit: Detroit River formation

Submitter notes: This specimen is 2.7 cm. It came from an old collection. The collectors found it at the Thompson-McCully quarry. Obviously, once upon a time it was possible to collect there. The name is as given by the collector. I would not know the difference between any of the genera.

Photo title: Rostroconch

Taxa present: Hippocardia cunea

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Eutaxocrinus wideneri, Platyceras sp. Silica formation Joseph Koniecki

Submitted on 2015-11-10 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is only 1 cm.

Photo title: Crinoid with gastropod

Taxa present: Eutaxocrinus wideneri, Platyceras sp.

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