Description

Conodonts

Source: http://pubs.usgs.gov/circ/2004/1264/html/trip3/pl1.html

Description

[Conodonts from the Deer Valley and Loyalhanna Limestone Members of the Mauch Chunk Formation] FIGURES 1, 2. Conodonts from the Deer Valley Member of the Mauch Chunk Formation, Keystone quarry, Pa. This collection (93RS–79c) is from the lower 10 cm of the Deer Valley Member. Note the nonabraded, although slightly broken, conodont elements of the high-energy oolitic marine facies of the Deer Valley Member.

1. Kladognathus sp., Sa element, posterior view, X140.

2. Cavusgnathus unicornis, gamma morphotype, Pa element, lateral view, X140.

3–9. Conodonts from the uppermost Loyalhanna Limestone Member of the Mauch Chunk Formation, Keystone quarry, Pa. This collection (93RS–79b) is from the upper 10 cm of the Loyalhanna Member. Note the highly abraded and reworked aeolian forms.

3, 4. Kladognathus sp., Sa element, lateral views, X140.

5. Cavusgnathus unicornis, alpha morphotype, Pa element, lateral view, X140.

6, 7. Cavusgnathus sp., Pa element, lateral view, X140.

8. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, X140.

9. Gnathodus texanus?, Pa element, upper view, X140.

10–14. Conodonts from the basal 20 cm of the Loyalhanna Limestone Member of the Mauch Chunk Formation, Keystone quarry, Pa. (93RS–79a), and Westernport, Md. (93RS–67). Note the highly abraded and reworked aeolian forms.

10. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–79a, X140.

11. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–67, X140.

12. Gnathodus sp., Pa element, upper view, reworked Late Devonian(?) through Mississippian morphotype, 93RS–67, X140.

13. Kladognathus sp., M element, lateral views, 93RS–67, X140.

14. Cavusgnathus sp., Pa element, lateral view, 93RS–67, X140

Conditions d’utilisation

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