STATE GEOLOGIST. 101 



D. Limestone, arenaceous, with nodules of chert. Seen 



dipping into the water 10 rods west, 4 in. 



C. Limestone, dark, calcareous, with bituminous (flinty?) 

 streaks and laminaB — intersected by broad cracks 

 which have been subsequently filled, with material 

 like D 10 in. 



B. Limestone, yellowish, highly arenaceous, thin bedded, 



rather incoherent, the lower one-fourth curiously band- 

 ed with lighter and darker streaks 1 J ft. 



A. Limestone, arenaceous, highly shattered and recement- 



ed. 



The flint nodules in the layer D, are bluish, of a fine, homo- 

 geneous structure and strike fire with steel, with great readi- 

 ness. They exist in large quantity. Should thert be a demand 

 for such an article, Wild Fowl Bay could furnish an abundant 

 supply. 



The layer E, would furnish a superior building material. 



The layers D, E and F, will make excellent lime, and the ele- 

 vation above the water, especially if the rock enters into the 

 formation of the high bank along here, would fully justify the 

 opening of a quarry. 



From this point the formation crosses Saginaw Bay, and next 

 appears on the Charity Islands. The rock is seen under water 

 for a long distance south-west of Little Charity Island. It out- 

 crops along the northern, western and southern shores, consist- 

 ing of one or two layers 12 to 15 inches thick. It abounds in 

 the Syringopora, before referred to, and contains some concre- 

 tions of a cherty nature. It is replete with traces of organic 

 remains, but nothing is well preserved or identifiable, save some 

 Bryozoa and Cyathophyllidce. 



The formation outcrops more extensively on the north side of 

 Great Charity Island, where it rises about five feet above the 

 water, and presents the following section: 



C. Limestone, areno-calcareous, containing Bryozoa, Cyath- 



ophyllidce and Allorisma, 10 in. 



B. Limestone, with cherty nodules, 10 in, 



A. Sandstone, calcareous, obliquely laminated, 4 ft. 



Some portions of A are well characterized sandstone, of a 



