Appendix. 199 



APPENDIX. 



Four Cardinal Points in Stratiographical Geology, established by 

 Organic Remains; by A. Eaton. 



If the identity of the Granular, the Metalliferous, and the Oolitic, 

 calcareous rocks, and of the Tertiary Marls, are established on both 

 continents, all intervening strata may be ascertained with great facility. 

 I think, that a reference to the following facts will be sufficient to es- 

 tablish their equivalent characters, at least. 



First Cardinal Point. 



GRANULAR LIMEROCK. 



The only limerock, which is always destitute of organic remains. 

 Second Cardinal Point. 



METALLIFEROUS, MOUNTAIN OR CARBONIFEROUS LIMEROCK. 



Shelly kind. — This rock contains Fungia discoidea, F. polymor- 

 pha, Columnarla sulcata, Productus hemisphericus, Calamena Blu- 

 menbachii, Asaphus caudatus, Orthocera annulata, O. striata, O. un- 

 dulata, Spirifer ambiguus, Turbinola mitrata, Lithodendron dichoto- 

 mum and L. plicatum. These I have before me, which were col- 

 lected chiefly at Glenn's and Trenton Falls, and all of them have been 

 collected in Germany, France and England, and well figured and 

 described by Sowerby, Brongniart, Goldfuss, Parkinson and others. 



Cornitiferous or Cherty kind. — Cyathophyllum ceratites, C. ver- 

 miculosum, C. flexuosum, C. vesiculosum, C. helianthoides, C. quad- 

 rigeminum, C. hexagonum. These seven species of the stone horns, 

 are found at and near Bethlehem Caverns, in the county of Albany ; 

 also in Germany, Great Britain, he. in the same rock. At Bethle- 

 hem, Catskill, Esopus strand, and on the Rondout, we find, in the 

 same rock, the Sarcinula auletlcon, S. microphthalma, Orthocera 

 paradoxica, Conularia quadrisulcata, C. teres, Productus depressus 

 and Gorgonia ripesteria. 



Third Cardinal Point. 



OOLITIC SERIES OF CALCAREOUS ROCKS. 



Coral Rag, or the Pyritiferous kind. — Astrea stylophora, A. po- 

 rosa, Asaphus Hausmannii. These three species are found in En- 



