284 Scientific Intelligence. 
is hardly a place to which we would refer with such confidence for,the 
true order of the strata, as to these rocks in St. Albans.” p. 375 
near Quebec. He says “from the physical structure alone, no person 
only his own ignorance of the question. We have no doubt from the 
palzontological evidence, that a great dislocation and overlap. exists 
at St. Albans and at Quebec. : : 
Not content with having annexed the Green mountain gneiss to his 
Taconic system, Mr. Marcou next proceeds to discuss the Laurentian and 
having found some Taconic rocks on the southern edge of the Lauren » 
g ; 
tide mountains, “ proposed to introduce into the table of the Americal 
strata two new systems, which he called the Laurentian and Huronian 
systems. The Laurentian system is composed of the Lower nn 
which are added all the unstratified crystalline rocks forming the ce” 
the Laurentide mountains, such as granite, syenite, diorite and por 
atte 
such a display of ignorance and misrepresentation is almost gece 
As to the Laurentide mountains, of which Mr. Marcou knows _ the 
ene 
rock, quartzites and limestones, which make up their 40,000 feet, a 
most clearly interstratified, and are lithologically entirely ease 
the gneiss of the Green mountains, a fact upon which Eaton insisted + she 
see ago. (Geological Text-book, 2d edit. 1832.) For a map? 
urentian limestones, showing their distribution, see the Geol. Survey 
Canada, Report for 1859. This system has been identified and fi 
nized by Sir Roderick Murchison as identical with the fundamenta- a ait 
of western Scotland, which he now calls Laurentian ; an additional 
As for the Huronian series, with its 10,000 feet of quartzites, conglom 
erates and diorites, so carefully studied and described by Mr. on 
Z e ' 
which all the world now knows to be Si uae by the per 
River limestones,) nor the rocks of Keweenaw Point, the Upper Cope 
bearing series of Sir William Logan; which he shows to ; 
graphical position of the Ste. Marie sandstones, and to rest make 
on the upturned Huronian strata. As for the error that would 
