. The Quarterly journal of the Geological Society of London. [Mar. 24, Leptsena sericea; plentiful Trenton. deltoidea; very abundant „ alternata „ Orthis (testudinaria) striatula „ lynx „ pectinella „ bellarugosa? „ disparilis „ Echino-encrinites anatiformis; plentiful „ Glyptocrinus decadactylus „ Calymene senaria „ Isotelus gigas „ Atrypa plena Cbazy. Encrinurus, with punctured cheeks. Raphistoma, two undescribed species, found also at Poquettes Rapid, Allumettes , allied to A. extans. or Rhynconella, allied to A. navicula, but with a sinus in the front of the larger
. The Quarterly journal of the Geological Society of London. [Mar. 24, Leptsena sericea; plentiful Trenton. deltoidea; very abundant „ alternata „ Orthis (testudinaria) striatula „ lynx „ pectinella „ bellarugosa? „ disparilis „ Echino-encrinites anatiformis; plentiful „ Glyptocrinus decadactylus „ Calymene senaria „ Isotelus gigas „ Atrypa plena Cbazy. Encrinurus, with punctured cheeks. Raphistoma, two undescribed species, found also at Poquettes Rapid, Allumettes , allied to A. extans. or Rhynconella, allied to A. navicula, but with a sinus in the front of the larger , Lingula, Bellerophon, Orthoceras. The fifth new locaHty in which the foot-prints occur is on theRiviere du Nord, in the Seignory of Argenteuil, along which river thesandstone again crops out, and runs in a direction almost ina line with the Valley of the Ottawa (see Map, Sect 3 i and fig. 3). The Fig. 3.—Section across the Riviere du Nord in the Seignory of No. 3 on the Map. Distance about 5 Gneiss, interstratified with limestone and traversed by dykes of trap and Sandstone with the Track-bed. c. Calciferous Sand-rock. dip of the strata is here a little more decided than we have yet had it,the inclination heing south at an angle of ahout 4°; and in the spaceof a mile and a quarter the stratigraphical relations of the rockscan be well made out. We have first the gneiss and its interstrati-fied limestone; then the sandstone, not seen in actual contact withit, but forming an escarpment of between 30 and 40 feet in height,between which and the gneiss there is a flat sandy valley, varying inbreadth from one quarter to half a mile, in which the stream windsits course. The sandstone has been traced thirteen miles consecu-tively to the eastward, and is known far beyond ; and where a trans-verse section was measured the track-bed occurs at the top of theescarpment at a height of probably 100 or 200 feet ov
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
