594 Annals of the Carnegie Museum. 



and seems to indicate a retreating sea at the close of the period immediately 

 preceding the deposition of the Black River strata." . . . "At Larrabee's 

 Point, over forty feet of Calciferous and Chazy limestones occur in proximity 

 to the base of the section, but the transition beds to the base of the lilack 

 River are not shown." . . . "At the southern end of South Hero, Grand 

 Isle, is an extensive anticline which exhibits . . . the entire section of the 

 Chazy." 



1902. Perkins, Geo. H. The Geology of Grand Isle. Report of the Vermont 

 State Geologist, New Series, No. 3, p. 102. 



This article describes in detail the outcrops of the Chazy formation found 

 on Grand Isle. The layers do not seem to be greatly tilted, the dip rarely 

 exceeding 10° to 15°, and is often less; but there are pronounced faults. 

 The upper beds are best exposed and are full of Ca7iiarot<xchia phna. The 

 lowest beds are thus described : " A mile northeast from Phelps Point is a 

 hill 150 feet above the lake, where the lower beds are well shown. Before 

 reaching this hill, not far east of the wagon road, there is a small outcrop 

 of the very lowest beds of the Chazy. These beds are very hard, yellow 

 when weathered, but dark-gray when freshly broken. There are here in 

 all not over four feet of rock. Most of it is not fossiliferous, but a few 

 layers contain an abundance of a large and probably undescribed Lingular 



1902. Raymond, P. E. The Crown Point Section. Bulletin of American Paleon- 

 tology, No. 14. 



In this paper a detailed section of the Chazy strata at Crown Point is 

 described, and many fossils listed. Four new species of Chazy fossils are 

 described, one of which, Triplecia g}-aci/is, is a synonym for Cavierella 

 longirostris Billings. 



1902. Seely, H. M. Some Sponges of the Chazy Formation. Report of the 

 Vermont State Geologist, New Series, Vol. 3, p. 151. 



In this paper several new species of sponge-like forms from the Chazy are 

 described. The species occur at Grand Isle and Isle La Motte, Vermont, 

 and Chazy, New York. 



1902. Ui.RlCH, E. O., and Schlichert, C. Paleozoic Seas and Barriers. Report 

 of the New York State Paleontologist, Bulletin 52 of the New York State 

 Museum, p. 633. 



In this extremely suggestive paper, it is attempted to show by the geo- 

 graphic distribution and faunal relations that the Chazy rocks were deposited 

 in a narrow bay which forked, one branch extending up the Ottawa ^'alley 

 and the other down the Champlain Valley, the open sea being to the east. 

 The following quotation seems to show their views of the basins in which 

 the Chazy formation was deposited. 



" With the earlier part of this subsidence, the Atlantic invaded the conti- 

 nent westward by means of the two subparallel and closely approximated 

 channels that we have called the Chazy Bay and Levis Channel. The 

 former extended along the northwestern side of the Quebec barrier, which 



