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Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin From Fayette County, Ohio, to Botetourt County, Virginia

Robert T. Ryder, John E. Repetski, and Anita G. Harris,
1996,
U. S. Geological Survey Map Series I-2495

Table 2. -Conodonts from the Joy Manufacturing Company corehole WVAC-1, Monroe County, W.Va. [Twenty-four samples (~500 g each) were taken from the core between 117 and 2,998 ft and processed for conodonts; only the productive samples are listed. CAI, conodont color alteration index is a measure of organic maturation (Epstein and others, 1977)]
Sample Interval (ft) USGS collection no. Stratigraphic unit Conodonts Age CAI Comments
202-203 11032-CO Beekmantown Dolomite 3 indeterminate fragments. Early Ordovician? 3-31/2 Dolostone.
253-254 11033-CO Beekmantown Dolomite upper. 1 Sc element of Diaphorodus delicatus.

1 Drepanoistodus? sp.

1 "Scolopodus" emarginatus.

2 Tropodus comptus.

1 indeterminate fragment.

 late Early Ordovician (Oepikodus communis Zone). 3-31/2 Dolomitic limestone
404-405 11034-CO Beekmantown Dolomite upper. 1 Chionoconus avangna.

1cf. Drepanodus concavus.

1 Eucharodus parallelus.

1?E. toomeyi.

1 Glyptoconus quadraplicatus.

1 Oepikodus communis.

4 Tropodus comptus.

1 New Genus 2 of Ethington and Clark (1981).

1 unassigned oistodontiform element.

2 indeterminate coniform elements.

 late Early Ordovician (Oepikodus communis Zone). 31/2 Dolostone
490-491 11035-CO Beekmantown Dolomite 2 Drepanodus concavus.

1 Glyptoconus quadraplicatus.

1 indeterminate fragment.

 Early Ordovician (Midcontinent Fauna D or Oepikodus communis Zone). 4 Dolostone; conodont elements have gray patina, from acid-etch processing or from hydrothermal fluids.
1,550-1,551 11036-CO Beekmantown Dolomite lower 2 Utahconus cf. U. utahensis

1 drepanodont, indeterminate genus and species.

 early Early Ordovician (most likely Cordylodus intermedius to lower C. angulatus Zones). 31/2 Dolostone.
1,887-1,888 11037-CO Beekmantown Dolomite 1 strongly costate Sa(?) element fragment indeterminate 31/2-4 Dolostone
2,011-2,012 11038-CO Beekmantown Dolomite

upper.

 1 Cristodus loxoides.

3 Diaphorodus delicatus.

2 Drepanodus arcuatus.

1 D. concavus.

2 Glyptoconus quadraplicatus

1 Parapanderodus? Emarginatus

3 unassigned coniform elements

 Early Ordovician; late Ibexian (Oepikodus communis Zone). 31/2-4 Dolostone
2,605-2,606 11039-CO Beekmantown Dolomite 1 Drepanodus? sp.

2 Eucharodus toomeyi.

2 Parapanderodus striatus?; primitive form

1 Protopanderodus leei

1 M element of ? P. leei.

1 inderterminate drepanodontiform element.

1 Coleodus? sp.

1 Polycaulodus gracilis s.f.

2 robust lamellar element fragments.

1 indeterminate drepanodontiform element.

 Early Ordovician (Midcontinent Fauna D). 31/2-4 Dolostone
2,950-2,951 11040-CO Peery Limestone, Five Oaks Limestone, Elway Limestone, and Blackford Formation, undivided. 1 Coleodus? sp.

1 Polycaulodus gracilis s.f.

2 robust lamellar element fragments.

1 indeterminate coniform element.

 Middle Ordovician; late Whiterockian or Blackriveran. ~4 Dolostone; conodont elements etched and have gray patina, from acid-etch processing or from hydrotheral fluids.
2,998-2,999 11041-CO Peery Limestone, Five Oaks Limestone, Elway Limestone, and Blackford Formation, undivided. 2 Oneotodus? Sp.

1 Pnaderodus? Sp. Indet.

2 robust lamellar multidenticulate elements; process fragments.

1 drepanodontiform element.

1 indeterminate coniform fragment.

 Middle Ordovician 31/2-4 Dolostone

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[ Table 1 | Table 2 | Table 3 ]
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