14 D 



GEOLOGICAL SURVEY OF CANADA. 



Island. 



Brunswick government, and attention was drawn by him to the 

 occurrence of the coal in what he then considered to be rocks of the 

 age of the New Eed Sandstone. From the reefs at Eagged Head 

 beautifully preserved specimens of Devonian plants are obtained, 

 many of which are graphitized. Some of these have been described. 

 (See report of 1870-71.) 

 _. ., , . A similar case of the occurrence of anthracite in rocks of presumed 



Similar coal in r 



Massachusetts Devonian age may be mentioned as existing in the states of Massachu- 



and Rhode ° J ° 



setts and Ehode Island, and is described in the report of Dr. Edward 

 Hitchcock on the Geology of Massachusetts for 1841. In this he des- 

 cribes the occuiTence of coal of precisely similar character to that of 

 Lepreau, glazed with plumbago, and occasionally converted into that 

 mineral ; very irregular in its distribution, and in rocks lithologically 

 resembling those in which the Lepreau mine is situated. These rocks 

 which probably correspond with the grey quartzites of the New Bruns- 

 wick Devonian, he caracterizes as greywacke and greywacke slates, 

 while the other members of the Devonian are represented by soft black, 

 brown and grey shales, slates and sandstones. Although reports on 

 this coal at the time of its discovery were quite favourable, it does 

 not seem to have been ever worked with any degree of success, and its 

 large percentage of ash, as with the Lepreau anthracite, was probably 

 fatal to its successful development. 



The largest area of rocks of this age is that occurring in the northern 

 part of Charlotte county, and extending eastward into Queens county. 

 These rocks have been described in the report of 1870-71, and are also 

 briefly mentioned in the report of 1876-77. They comprise the former 

 so-called pale argillite group. They are superimposed upon Cambro- 

 Silurian rocks, and extend from the St. Croix Eiver, near Sprague's 

 Falls, to the Charlotte county line, and thence into York. At the line 

 of contact the dips are nearly vertical, but there is in places an appar- 

 ent conformability between the dark argillite portion of the Cambro- 

 Silurian and the series under discussion. It is probable, however, that 

 faults occur at the line of contact, as the beds of fossiliferous Silurian so 

 well developed about Oak Bay, on the south side of the Cambro-Silurian 

 belt, are entirely wanting along the northern margin. The Devonian 

 age of these rocks has been based by Mr. Matthew upon the occurrence 

 of remains of Lepidodendron found in Cox's Brook, a small branch of 

 the Magaguadavic Eiver, as well as from certain graphitic films, sup- 

 posed to be the impression of fern leaves, found in the eastern extension 

 of these beds into Queens county. They also possess many points of 

 resemblance, lithologically, to the typical Devonian of Mispec, and 

 hence they have been provisionally assigned to this horizon. Their 

 exact relations have not as yet been determined, the unfavourable 



Devonian of 

 northern part 

 of Charlotte. 



