Middle and Upper Ordovician graptolites from the St. Lawrence Lowlands, Quebec, Canada
- 1 May 1977
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Earth Sciences
- Vol. 14 (5) , 932-952
- https://doi.org/10.1139/e77-088
Abstract
Eleven species of Middle and Upper Ordovician graptolites are described and illustrated, a lectotype is selected for Orthograptus reudemanni (Gurley) and the occurrence of eighteen other species is recorded. The specimens were collected from sections along the Bécancour, Nicolet, Nicolet Sud-Ouest, and St. François Rivers of the St. Lawrence Lowlands, Quebec. The graptolite zonal scheme proposed by Riva for eastern North America is reviewed and adopted in the present study.This publication has 1 reference indexed in Scilit:
- North American Graptolites: New Species and Vertical RangeThe Journal of Geology, 1896