40 



NEW YORK STATE MUSEUM 



of the Onondaga limestone of New York and in their lithic and stratic 

 features are very suggestive of that rock. At this locality fossils are pro- 

 fuse, especially Rensselaeria ovoides van gaspensis, Camaro- 



toechia pliopleura, Pro- 

 etus phocion, Phacops 

 1 o g a n i. The combined thick- 

 ness of the two parts of this divi- 

 sion is about loo feet. 



2 The chert^bearing, impure 

 limestones constitute most of the 

 exposures to be found on the 

 south slope of the Forillon and 



Sketch of Shiphead from the coule'e separating it from Cape Gaspe may be Studied whereVer the SOil 



is thin. So abundant is the chert that by differential weathering it has been 

 left standing out on all exposed surfaces, the rock presenting an altogether 

 similar aspect to the cherty layers of the Onondaga limestone. The rock 

 has been permeated by silicious matter to such a degree that it passes into 

 "rotten stone" after extraction of the lime. Excellent outcrops of these 

 layers are seen at the foot of the King's road and up this road over the 

 slopes to the west. Stripping of the soil in the hunt for silver-lead 

 veins in recent years has exposed the strata at several spots along the 

 highway below and above Grande Greve. Fossils do not abound in 

 all layers, but they are extremely abundant in some and these are the 

 chief repository of the fauna of the formation. Eatonia pecu- 

 liar i s constitutes entire layers, Spirifer cyclopterus, S. plica- 

 tus, S.murchisoni, Dalmanites dolbeli, D. esnoufi. Lie has 

 bellamicus, Conularia lata, are characteristic and abundant 

 species. Hipparionyx proximus, Rhipidomella muscu- 

 losa, R. logani, Megalanteris thunei and Chonetes cana- 

 densis, the index species of the lowest beds, have not been observed 

 at this horizon. 



It is not easy to estimate the thickness of these beds. I should 



