646 E. O. ULRICH REVISION OF THE PALEOZOIC SYSTEMS 



massive limestone, but for the most part is made up of thin-bedded, 

 ■occasionally argillaceous dolomites, with an estimated thickness of about 

 600 feet. The following 1,000 feet or more consists of interbedded 

 quartzite and more or less heavy-bedded gray dolomite, with occasional 

 beds a few feet thick of thinly laminated dolomite. Thin beds of oolite, 

 often silicified, are rather common toward the top. 



In the Nittany Valley anticline, at Bellefonte, only the upper 340 

 feet is exposed. This consists almost entirely of fine or coarser grained, 

 generally dark colored dolomite. A little sandstone occurs beneath the 

 middle of the exposure, and oolitic chert is sparingly distributed through 

 the upper two-thirds. So far as it goes, the formation agrees very well 

 with the corresponding part in the Lehigh Valley. 



The Kittatinny formation is to be correlated in a general way with the 

 Conococheague of the Chambersburg, Pennsylvania, quadrangle. But 

 "that formation, with its clay and sand-streaked, non-dolomitic limestone, 

 is so strikingly different in its lithologic aspects — in both fresh and 

 weathered states — from the Kittatinny that a distinct name is desirable. 

 The Conococheague in its typical phase (see description in U. S. Geol. 

 Survey Folio 170) extends north in the Cumberland Valley, and thence 

 passes on in the Lebanon Valley as far at least as Heading, being clearly 

 recognizable to the north of that city between Ontelaunee station and the 

 city waterworks. The distribution of these two phases of Ozarkian 

 deposition in Pennsylvania suggests at least partially separated basins. 

 Confluence of these basins is indicated during the early Canadian, but 

 that separation, with some modifications, soon again prevailed is clearly 

 suggested by faunal and lithologic differences noted in comparing the 

 Canadian sections at Chambersburg and Bellefonte. 



The Ozarkian period in Newfoundland and Europe. — Tne Ozarkian 

 may be represented by divisions D and E in Logan's section of western 

 I^^ewfoundland, but the available information respecting these beds is far 

 from satisfactory. Divisions F, G, and H, however, have furnished good 

 fossils, which, as described by Billings, leave no doubt of their Cana- 

 dian age. 



I have failed entirely to recognize the Ozarkian in the British sec- 

 tions. If the system is really present there, then it must be in the 

 ^^Upper Lingula Flags,'' since the "Lower Lingula Flags" are middle 

 Cambrian and the Tremadoc, according to published lists of fossils, 

 undoubtedly Canadian. The faunas ascribed to the Upper Lingula 

 Flags, which contain Dictyonema flabelUforme and Orusia lenticularis, 

 also impress me as younger than any American fauna now referred to 



