NIAGARAN (aNTICOSTIAN) SERIES 705 



the line between the Cincinnatic and Sihiric periods or systems between 

 Kichardson's zones Cn and C^g- 



Becsie River formation {Eicliardsori s C^2 io C^^ and D^), — The Becsie 

 Eiver formation can be seen on the south shore beginning at Bear Cliff 

 and extending eastward to Otter Eiver. The strata here have a thicknesb 

 of perhaps 200 feet, an estimate which is about -iO feet less than that 

 given by Eichardson, this reduction relating entirely to D^, which Eich- 

 ardson gives as 100 feet. This formation consists of yellowish gray to 

 brown, argillaceous, brittle, nodular and shell limestones, with shale 

 partings, and without zones of conglomerate. 



Along the north shore this formation begins at Lousey Cove and forms 

 the line of cliffs and coves extending eastward to Fox Bay. Its upper 

 limit is arbitrarily placed at the east horn of Fox Bay. As will be shown 

 later, the strata of Fox Bay belong to the next succeeding formation. 

 Few fossils were obtained on the north side, as the weather did not per- 

 mit access to many of the cliffs and much is concealed in the upper half, 

 but the thickness is probably slightly in excess of 200 feet. The zones 

 of the Becsie Eiver formation are characterized as follows: 

 Phwnopora expansa 'beds. P^^^ 

 Di (Richardson's Cio). South shore. Gray limestones with argil- 

 laceous partings 62 



Has Brachyprion leda, Schuchertella pecten, Parastrophia n. 



sp. 1 (transitional between P. reversa and Clorinda harrandii), 



and Atrypa marginalis. 



D, (rz^Cis). South shore. Brownish gray, argillaceous, brittle, nodular 



limestones, interstratified with thin shale bands. Forms Bear 



Head 42 



Has Stromatopora, Favosites gothlandicits, Rhipidomella cir- 

 cula (a Clinton species), Brachyprion leda, Parastrophia n. sp. 

 1, Clorinda n. sp., Atrypa marginalis, and Anoplotheca plano- 

 convexa (common, the Dundas, Ontario, Medina form). 

 Dg (=Ci4). South shore. Brownish gray thin-bedded limestones form- 

 ing outer beds of Long Point 35 



Has Stromatopora, F. gothlandicus, Phcenopora expansa 

 (common), Rapiesquina ceres or profunda, and Parastrophia 

 n. sp. 1. 



Clorinda barrandii beds. 



D4 (=Di). South shore. Thin-bedded grayish to brownish gray some- 

 what arenaceous limestone with almost no shale partings. 

 Richardson gave the thickness as 100 feet, but there is believed 



to be little more than 60 



These beds may be seen between Long Point and Whale Cliff, 

 and especially at Becsie River and Duck River. All of the 

 strata have Clorinda harrandii, but they are especially abundant 



