THE 



AMEHICAN 



JOURNAL OF SCIENCE, &c. 



Art. I. — A Description of the Mineralogy and Geology 

 of a part of Nova Scotia; by Charles T. Jackson and 

 Francis Alger. 



(Concluded from Vol. XV, p. 160.) 



The fossils discovered in it are the tellenite, pectinite, and 

 terebratulite, which are common throughout the bed. They 

 are usually small although very distinct. Among those of 

 less frequent occurrence are small lenticular shells, resem- 

 bling the nummulite, as figured in Parkinson's Outlines of 

 Oryctology, plate vi, fig, 5. Also several impressions of en- 

 trochi, which, instead of being in cylindrical columns as they 

 ordinarily occur, are formed of trochital, or round joints, 

 which are smaller at one extremity than the other, so that 

 the entrochus itself assumes a conical form. See Park. Org, 

 Rem. vol. ii, p. 164. These impressions are not confined to 

 the ore alone, but may be seen, more or less, in almost every 

 slate stone scattered through the adjoining fields. Should 

 this ore be explored, it is probable that a greater variety of 

 these entombed relics will be brought to light, and furnish 

 the collector with many rare productions of the antediluvian 

 world. This bed of ore does not again distinctly appear, 

 until it shows itself on Nictau Mountain, in Annapolis coun- 

 ty, being covered and hidden for the whole distance by the 

 unbroken forest. Intermediate indications of it have, how- 

 ever, been discovered, and masses have been found in sever- 

 al places ; as for instance on the Horton Mountains, which 

 are a part of the connected range. Here we found speci- 

 mens of it exhibiting similar impressions with the other, and 

 rendering probable the supposition, that the ore continues for 

 the whole distance, though perhaps intercepted by dykes 

 which are at present undiscovered. At Nictau, the width of 



Vol. XV,— No, 2. 1 



