OF CENTRAL CANADA PART V. 351 



Some of the Dudswell beds form veined marbles of considerable 

 beauty, black and yellow, and white and yellow, in colour ; and these 

 limestones in their less altered portions shew Devonian fossils, or 

 mixtures of these with Upper Silurian types. In Gaspe, proper, 

 Devonian rocks occupy wide areas, and consist of limestones, sand- 

 stones, and conglomerates. Where in contact with Upper Silurian 

 strata (below), and with Lower Carboniferous conglomerates (above), 

 as in Perce, etc., they are unconformable to both of these formations. 

 The arenaceous beds constitute the more typical strata of this 

 Devonian series, and are made up essentially of gray shales and gray, 

 brown, and reddish sandstones, holding in places, more especially 

 around Gasp^ Bay and near Fleurant Point on the Bay of Chaleurs, 

 numerous plant remains ; and at the latter locality the remains also 

 of ganoid fishes (see ante, page *J91). The fossil plants comprise 

 examples of Psilophyton (tig. 12u), Lepidodendron (fig. 121) Stig- 

 maria, Cordaites (fig. 122), Catamites (fig. 119), Annularia, Pro- 

 totaxites, etc. A thin seam of shaly coal, a few inches thick, occurs 

 also in these beds at Little Gaspe Cove ; and petroleum springs ooze 

 through the strata at Douglastown on the south shore of Gaspe Bay, 

 but borings put down in the vicinity of these have failed to obtain 

 a profitable supply. At Tar Point, a grey amygdaloidal dyke con- 

 tains pitch-like petroleum in some of its cavities. Other eruptive 

 dykes break through the Devonian strata on this part of the Gaspe* 

 coast and on the Bay of Chaleurs, as described below. 



The Carboniferous strata of the district belong to the lower part 

 of the Coal Measures, but are entirely destitute of coal. They form 

 the "Bonaventure formation" of the late Sir William Logan, and 

 consist essentially of conglomerates, associated with red and brown 

 sandstones and shales, many of which contain fossilized vegetable 

 remains or casts of these. The conglomerates are made up of rounded 

 masses or pebbles of limestone, sandstone, syenite, agate, quartz and 

 other rock-matters, held together by an arenaceo-calcareous cement. 

 These beds rests unconformably on the Devonian and Silurian strata 

 of the Gasp^ coast. They occupy the entire area of Bonaventure 

 Island, and occur in comparatively narrow strips along the Bonaven- 

 ture and Perce shore of the mainland. They form also the upper 

 portion of the Perc^ mountain, but the lower conglomerates for- 



