. Annual report. New York State Museum; Science; Science. EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 41 include with them the grass-green shale of Shiphead, with Dalmanites dolbeli at the top of Logan's division 7 and from the base of these to the base of the chert beds on Shiphead is about 300 feet. Above are 75 to 100 feet of chert-bearing rocks on which the lighthouse stands, making an approximate total of 400 sh,ph«d ^^^ c««pe- feet. The beds of our division 3, if ever present at the cape, have been sheared away. 3 The beds of this division are gray-blue lime- stones, i
. Annual report. New York State Museum; Science; Science. EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 41 include with them the grass-green shale of Shiphead, with Dalmanites dolbeli at the top of Logan's division 7 and from the base of these to the base of the chert beds on Shiphead is about 300 feet. Above are 75 to 100 feet of chert-bearing rocks on which the lighthouse stands, making an approximate total of 400 sh,ph«d ^^^ c««pe- feet. The beds of our division 3, if ever present at the cape, have been sheared away. 3 The beds of this division are gray-blue lime- stones, iree OI CIlCrL, ailU Section across the Forillon at end of Cape Gaspe; St Lawrence river at the north dt I (right), Gaspe bay at the south. Elevation 6go feet. The figures represent i aiOIlg LllC Logan's divisions, of which 8, 7 and perhaps part of 6 are embraced within the hx •..! /-> / Grande Greve limestones ore at Little Oaspe where they are overlain by the Gaspe sandstones. They contain pretty much the same fauna as the beds immediately beneath, though Chonetes m e 1 o n i c u s has, in a single instance only, been met with at any other horizon. Logan has Regarded the contact of limestone and sandstone at Little Gaspe an unconformity and in this case these beds may not represent the true summit of the series as they are absent from Grande Greve to Shiphead, but it is quite likely that their absence is due to shearing away. They are apparently about 50 feet thick. Our estimate of the probable thickness of these strata, 550 feet, falls notably below that of Logan, 800 feet, but in our judgment some portion of the series has been lost at the top and it is quite possible that the original thickness fully equaled that ascribed to it by Logan. Dtp. The inclination of the limestones on the Forillon is practically uniform and the lower beds are conformable herein with the upper. The degree and direction of dip was given by Logan as southwest < 24°. This dip is qualified
Size: 2327px × 1074px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
