TABLE OF CONTENTS. XI 



PENNSYLVANIA. 



Views of H. D. Rogers in regard to tlio older rocks of this State, 4G7, 468 ; 

 remarkable contradictions in his statements, 467, 468. HuN'T employed by 

 Lesley " to collate all the known, sujjposed, and suspected facts of American 

 Azoic Geology," 468; result of the same, 469. Hunt's views, in 1861 and 

 1871, of Pennsylvania geology, 469, 470 ; here again most remarkable contra- 

 dictions, 470. Hunt, in 1876, makes various statements contradictory of Les- 

 ley's opinions, 471. Prime on the gneissic rocks of Lehigh County, 471 ; he 

 contradicts Hunt in reference to the age of certain iron ores, 472. C. E. Hall 

 on the formations of Eastern Pennsylvania, 472. His results differ much from 

 those of Hunt, 473. Some remarks of Lesley in regard to the remarkable 

 differences between the views of Rogers and C. E. Hall, 473 ; a key to the 

 geology found, but "it will not turn in the lock," 474. 



VIRGINIA. 



Fontain'e's views of the geology of the vicinity of Balcony Falls, 474. Ca^ipbell 

 on the same rocks, 475 ; his peculiar views in regard to the Laurentian and 

 Huronian, 475 ; criticism of these Wews, 476. 



NORTH CAROLINA. 



Kerr's report of 1875, 476, 477 ; he assigns a large portion of the State to the 

 Laurentian and Huronian, 476, 477 ; Bradley, in 1875, considers a large part 

 of these rocks as being Silurian or newer, 473 ; Kerr admits doubt in regard to 

 the validity of his results, 478. No satisfactory reference of any of the rocks of 

 this State older than the Trias, 479. 



SOUTH CAROLINA. 



Lieber's work gives no clue to the age or order of succession of the older crystalline 

 rocks of this State, 479 ; Hunt, however, from Lieber's description, considers 

 that he identifies the Green and White Mountain series, 479 ; Hunt's inferences, 

 so far as can be made out, in contradiction with the statements of Lieber, 480. 



GEORGIA. 



Little says that there is no Azoic in this State, 480 ; Hunt, on lithological grounds, 

 refers some of the rocks to the Montalban, and some to the Taconian, 480. 



TEXAS. 

 Buckley's reports noticed and criticised, 480, 481 ; they are of no importance, 481. 



TENNESSEE. • 



Safford on the older rocks of this State, which he sees no reason for referring to 

 the Laurentian or Huronian, 481. Bradley holds that all the metamorphic 

 rocks of Tennessee are of Silurian age, 481. 



