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Undescribed sp., Arthroacantha carpenteri |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A closer view of the amazing slab of 7 complete and partial crowns. 4 mature undescribed ophiuroids and 40+ immature brittlestars also litter the surface of this wonderful death plate. The overall size of this slab is 13.5 X 15.5 inches and 2.25 inches thick. Collected many years ago. Note the 2 mature ophiuroids just above center in the photo and 2 more nestled together in the upper left. Many immature specimens can be seen scattered about.
Photo title: CRINOIDS AND BRITTLESTARS
Taxa present: Undescribed sp., Arthroacantha carpenteri
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Undescribed sp., Arthroacantha carpenteri |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view of a partial brittlestar from previous post. This mature individual measures 20mm X 12mm. Note the immature specimens nearby.
Photo title: UNDESCRIBED OPHIUROID
Taxa present: Undescribed sp., Arthroacantha carpenteri
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Undescribed sp., Arthroacantha carpenteri |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view of a partial brittlestar from the crinoid/brittlestar death slab. This mature individual measures 40mm X 31mm. Note the immature specimens nearby.
Photo title: UNDESCRIBED OPHIUROID
Taxa present: Undescribed sp., Arthroacantha carpenteri
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Undescribed sp., Arthroacantha carpenteri |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view of 2 brittlestars from the crinoid/brittlestar death plate nestled together. These mature specimens measure 32mm X 25mm and 13mm X 11mm. Note the immature specimens nearby.
Photo title: UNDESCRIBED OPHIUROIDS
Taxa present: Undescribed sp., Arthroacantha carpenteri
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Undescribed sp. |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view taken under a stereo zoom microscope of one of the individual immature specimens from the crinoid/brittlestar death plate. The average size of these babies ranges from 4.8mm to 6.4mm in diameter.
Photo title: UNDESCRIBED IMMATURE OPHIUROID
Taxa present: Undescribed sp.
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Undescribed sp. |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view taken under a stereo zoom microscope of another of the individual immature specimens from the crinoid/brittlestar death plate. The average size of these babies ranges from 4.8mm to 6.4mm in diameter.
Photo title: UNDESCRIBED IMMATURE OPHIUROID
Taxa present: Undescribed sp.
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Undescribed sp. |
Silica formation |
Pat Rutkowski |
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Submitted on 2009-11-19 by Pat Rutkowski
Location (approximate): Sylvania, Lucas, OH
Strat unit: Silica formation
Submitter notes: A close-up view taken under a stereo zoom microscope of another of the individual immature specimens from the crinoid/brittlestar death plate. The average size of these babies ranges from 4.8mm to 6.4mm in diameter.
Photo title: UNDESCRIBED IMMATURE OPHIUROID
Taxa present: Undescribed sp.
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Unknown sp. |
Genshaw formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Genshaw formation
Submitter notes: A rare Devonian lungfish tooth. One of three known specimens. Approximately 12mm long
Photo title: LUNGFISH TOOTH PLATE
Taxa present: Unknown sp.
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Unknown sp. |
Genshaw formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Genshaw formation
Submitter notes: An unidentified fish tooth measuring 12mm wide.
Photo title: FISH TOOTH
Taxa present: Unknown sp.
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Gennaeocrinus goldringae |
Bell formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Bell formation
Submitter notes: A side view of a very ornate species measuring 7mm wide and 5.5mm tall.
Photo title: CRINOID CALYX
Taxa present: Gennaeocrinus goldringae
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Gennaeocrinus goldringae |
Bell formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Bell formation
Submitter notes: Opposite side view of a very ornate species measuring 7mm wide and 5.5mm tall.
Photo title: CRINOID CALYX
Taxa present: Gennaeocrinus goldringae
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Gennaeocrinus goldringae |
Bell formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Bell formation
Submitter notes: A tegmen view of a very ornate species measuring 7mm wide and 5.5mm tall.
Photo title: CRINOID CALYX
Taxa present: Gennaeocrinus goldringae
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Favosites sp. |
Hungry Hollow formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: A very small coral colony measuring 9mm X 4mm.
Photo title: COLONY CORAL
Taxa present: Favosites sp.
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Favosites sp. |
Hungry Hollow formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: A vnunderside view of the very small coral colony measuring 9mm X 4mm.
Photo title: COLONY CORAL
Taxa present: Favosites sp.
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Melocrinites sp. |
Bell formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Alpena, Alpena, MI
Strat unit: Bell formation
Submitter notes: A rare crinoid measuring 10mm long.
Photo title: CRINOID STEM AND PARTIAL CALYX
Taxa present: Melocrinites sp.
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Gilbertsocrinus spinigerus |
Hungry Hollow formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: Surface collected in the Hungry Hollow mb. This crushed specimen may have an unusual 4th row of spines on the calyx. It mesures 15mm wide.
Photo title: CRINOID CALYX
Taxa present: Gilbertsocrinus spinigerus
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Tornoceras (T.) arkonensis |
Arkona formation |
David Clark |
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Submitted on 2009-11-19 by David Clark
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: A common pyritized ammonite from the Arkona Formation. It measures 7.5mm in diameter.
Photo title: Ammonite
Taxa present: Tornoceras (T.) arkonensis
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Synbathocrinus matutinus |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2009-11-19 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: A very nice calyx measuring 9.2mm tall.
Photo title: CRINOID CALYX
Taxa present: Synbathocrinus matutinus
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Gennaeocrinus sp. |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2009-11-19 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: A side view of a nice calyx measuring 15mm in diameter and 13mm high. The tegmen plates are missing.
Photo title: CRINOID CALYX
Taxa present: Gennaeocrinus sp.
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Gennaeocrinus sp. |
Thunder Bay formation |
Stan Hyne |
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Submitted on 2009-11-19 by Stan Hyne
Location (approximate): Alpena, Alpena, MI
Strat unit: Thunder Bay formation
Submitter notes: The opposite side view of the calyx measuring 15mm in diameter and 13mm high. The tegmen plates are missing.
Photo title: CRINOID CALYX
Taxa present: Gennaeocrinus sp.
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