HONEYMAN ON THE GEOLOGY OF NOVA SCOTIA. 199 



Island of Cape Breton," London, 1871, thus writes page 4, " the 

 limestones of this formation, (carboniferous) are well adapted for 

 agricultural and building purposes, and in some places, in the 

 vicinity of igneous rocks, furnish white, gray and variegated 

 marble of good quality in great abundance." The "igneous 

 rocks " are the syenites and diorites described ; and the *' white, 

 gray and variegated marble," are our white, blue and serpentinous 

 marbles. 



In the geological map of Cape Breton, opposite the title page of 

 Mr. Brown's work, and intended to illustrate it, I find the geology 

 of George's River indicated by a broad band of carmine color, 

 (igneous) and then a band of light purple metamorphic and Silurian, 

 extending to George's River. This covers all the region of my 

 survey from Long Island to George's River, and inserts a metamor- 

 phic and Silurian band between his igneous rocks and carbonifer- 

 ous, which would interfere with the conversion of any limestone of 

 the latter by the igneous rocks into marble. 



Dr. Dawson, in his Acadian Geology, specifies this district and 

 its marble, under " Carboniferous System, Cape Breton County," 

 page 419. He says, "An altered limestone which extends from 

 the neighborhood of Long Island on the Little Bras d 'Or, toward 

 the East Arm, affords a gray and white marble." 



This is substantially the same view in reference to the age and 

 origin of the George's River marble, as given by Mr. Brown. 



In answer to this view, I only adduce one incontrovertible fact, 

 which proves that the contact of syenite with lower carboniferous 

 limestone, does not produce marble. On the south side of An- 

 tigonish Harbor, there is a mountain consisting of syenite and 

 lower carboniferous limestone, having syenite in direct contact with 

 fossiliferous limestone throughout. On the summit the syenite and 

 limestone form a breccia. The limestone and its fossils, which 

 consist of connularia and entomastraca, are entirely unaltered. 

 Vide specimens in the Provincial Museum and in the Museum of 

 the Dominion Survey, Gabriel Street, Montreal. 



In the Map of the Cape Breton Coal Field, Acadian Geology, 

 page 413, I find that the geology of the whole George's River 

 district under examination, is indicated by five parallel lines, and 



