

258 THE CAMBRIAN. (bull. 81. 



Feet, 

 (wt) Hard, thick beds of gray and sometimes reddish limestone. Two species 

 of Conocephalites have been recognized by Mr. Billings, and a small 

 fragment supposed of Paradoxides from a loose stone at Topsail Head; 



also Salterella and Crania labradorica. Thickness at Topsail Head 100 



(I) lied, green, and blackish argillaceous slates. A few remains of trilobites 

 were found at Random Island, one of which resembles Bathyurus grega- 



rius (Billings) 250 



(k) Conglomerate of Manuel's Brook, not recognized elsewhere 50 



(j) Red and green argillaceous shales or slates. Thickness at Brigus South 



Head 150 



(i) Red and flesh-colored limestones, in which some obscure fossils have been 



found, and an Arclneocyathus detected by Mr. Billings 20 



(h) Red slate - 30 



(<7) Thin bed of impure red limestone 10 



(/) Red slate 40 



(e) Red, green, and gray sandstones, with occasional beds of conglomerate. The 



upper beds flaggy 750 



(d) Green and reddish brown or purple slates, with smooth and regularly par- 

 allel cleavage, independent of the bedding, splitting into slabs under 

 half an inch thick. This is the position of the workable slates of Smith's 



Sound and Random Island 137 



(c) Abed of impure flesh-colored limestone 3 



(6) Green slate, same character as d 10 



150 



(a) Hard, dark green-gray sandstones with slaty divisions, the sandstone beds 



varying in thickness from 4inches to 1 loot 600 



Total 5,972 



On page 100 of the reprint of the report of the Geological Survey of 

 Newfoundland for 1808 1 a section is given of the strata of Great Bell 

 Isle, as follows : 



ASCENDING. 



Feet. 



(1) Black or dark brown shales, with thin beds of sandstone from 2 to 6 inches 



thick, of a gray color on fracture, mica being thickly disseminated in both 

 shales and sandstones, and especially at the division of the harder mem- 

 bers 20 



(2) Thin bands of sandstone like the preceding, weathering a rusty brown color, 



aud divided by layers of black shale : 6 



(3) A hard, strong bed of gray sandstone, with conchoidal fracture, irregularly 



bedded, average thickness about 4 



(4) Alternations of black shale and sandstone towards the top of the vertical 



cliff 60 



(5) A heavy mass of strata, mostly sandstone, forms the crest of the cliff 10 



(()) Alternations of very micaceous gray sandstone aud shale, the former mostly 



thin-bedded, varying from 1 to 6 or 8 inches, with Cruziana in great profu- 

 sion on many surfaces. Nodular concretions, holding Lingular among the 

 shales 100 



(7) The upper strata are a good deal coucealed, but beds of sandstone occasion- 



ally crop out on the bed and banks of a small brook near the line of section, 

 some of which is of a pale yellowish color, in some cases nearly a foot thick, 

 estimated 196 



'Murray, Alex.: Of the sequence and distribution of the formations. Report upon the geological 

 survey of Newfoundland for 1868. St. John's, 1868. Revised edition, 1881. 



