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Devonochonetes fragilis |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: These specimens were collected at the Martin-Marietta Quarry. The larger measures 25.3mm x 16.3mm.
Photo title: Brachiopod
Taxa present: Devonochonetes fragilis
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Protoleptostrophia perplana |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: These strophomenid brachiopods were collected on the shale dump piles at the Martin-Marietta Quarry. The larger measures 44.3mm x 36.2mm.
Photo title: Brachiopod
Taxa present: Protoleptostrophia perplana
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Echinocoelia umbonata |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This brachiopod is abundant in unit 17 of the Silica Fm. Formerly known by the genus 'Ambocoelia'. Note: dime for size.
Photo title: Brachiopods
Taxa present: Echinocoelia umbonata
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Sphenophragmus nanus |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This brachiopod is abundant in unit 18A (coral bioherm) of the Silica Fm. It is also rarely found in units 7 & 17. Note: dime for size.
Photo title: Brachiopods
Taxa present: Sphenophragmus nanus
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Megastrophia concava |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This large brachiopod was collected at the Medusa quarry. Probably unit 8. It measures 54.3mm x 44.1mm.
Photo title: Brachiopod
Taxa present: Megastrophia concava
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Hercostrophia robusta |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: These fragile specimens were collected from unit 7 of the Medusa North Quarry. The largest measures 24.2mm x 19.7mm.
Photo title: Brachiopods
Taxa present: Hercostrophia robusta
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Tropidoleptus carinatus |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: These specimens were collected at the Martin-Marietta Quarry. The largest measures 20mm x 17.2mm
Photo title: Brachiopods
Taxa present: Tropidoleptus carinatus
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Trachypora labyrinthica |
Silica formation |
John Topor |
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Submitted on 2009-02-04 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This tabulate coral was collected from unit 7 of the Medusa North Quarry. The largest measures 11mm x 20mm.
Photo title: Coral
Taxa present: Trachypora labyrinthica
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Intrapora irregularis |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: These bryozoans occur in bifoliate fronds often encrusted with the bryozoan Hernodia on its surface. From unit 7 of the Medusa North Quarry. The largest specimen measures 40mm x 20mm.
Photo title: Bryozoan
Taxa present: Intrapora irregularis
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Aulocystis jacksoni |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: This common coral, found in the lower part of unit 7, is found at all Silica Fm. localities. The specimens in the photo range from 15mm to 25mm long.
Photo title: Coral
Taxa present: Aulocystis jacksoni
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Pholidostrophia nacrea |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A common brachiopod in unit 7. Single valves showing good internal structure can be found. Pictured specimens range from 20-22mm long by 15-16mm wide
Photo title: Brachiopods
Taxa present: Pholidostrophia nacrea
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Paraspirifer bownockeri, Mediospirifer audaculus, Hederella sp. |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: View #1: An uncleaned pyritized specimen from unit 9 of the Medusa North Quarry encrusted with the bryozoan Hederella. The larger Paraspirifer measures 54mm x 41mm.
Photo title: Brachiopod Pair
Taxa present: Paraspirifer bownockeri, Mediospirifer audaculus, Hederella sp.
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Paraspirifer bownockeri, Mediospirifer audaculus, Hederella sp. |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: View #2: An uncleaned pyritized specimen from unit 9 of the Medusa North Quarry encrusted with the bryozoan Hederella. The larger Paraspirifer measures 54mm x 41mm.
Photo title: Brachiopod Pair
Taxa present: Paraspirifer bownockeri, Mediospirifer audaculus, Hederella sp.
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Paraspirifer bownockeri |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: Large pyritized specimens of Paraspirifer are common, but good small specimens are harder to come by. These 6 specimens were collected from unit 9. The largest measures 30mm x 24.5mm and the smallest is 25.8mm x 17mm.
Photo title: Brachiopod
Taxa present: Paraspirifer bownockeri
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Pleurodictyum cornu |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: These tabulate corals are from unit 7. The large specimen showing pyrite crystals measures 22.4mm in diameter.
Photo title: Corals
Taxa present: Pleurodictyum cornu
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Gilbertsocrinus ohioensis |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A heavily pyritized calyx showing the basal area spines. One of the more common crinoids of the formation. The calyx measures 22mm x 26mm and rests on matrix measuring 75mm x 61mm.
Photo title: Crinoid Calyx
Taxa present: Gilbertsocrinus ohioensis
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Leiorhynchus kelloggi |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: These brachiopods occur in the upper part of the Silica Fm. in units 19, 22 & 23 encased in limestone. Their outer epidermal layer is missing due to exposure during blasting.
Photo title: Brachiopods
Taxa present: Leiorhynchus kelloggi
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Mucrospirifer prolificus |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: A very common brachiopod at this locality. The largest specimen measures 34mm x 16.4mm
Photo title: Brachiopods
Taxa present: Mucrospirifer prolificus
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Reptaria stolonifera |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: VIEW #1: Zoarium of this species of bryozoan are usually present on the casts of the living chambers of cephalopods. In this case, a straight nautiloid cephalopod. The cephalopod measures 78.7mm long and 26mm at the widest point. Note the small brachiopod attached on the right.
Photo title: Bryozoan encrusting a Cephalopod
Taxa present: Reptaria stolonifera
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Reptaria stolonifera |
Silica formation |
John Topor |
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Submitted on 2009-02-05 by John Topor
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: VIEW #2: Zoarium of this species of bryozoan are usually present on the casts of the living chambers of cephalopods. In this case, a straight nautiloid cephalopod. The cephalopod measures 78.7mm long and 26mm at the widest point.
Photo title: Bryozoan encrusting a Cephalopod
Taxa present: Reptaria stolonifera
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