Abstract - Carbonate rocks have been sampled through predominantly siliciclastic sediments above the Precambrian-Cambrian global stratotype level in ...
265
Geol. Mag. 129 (3), 1992, pp. 265-279. Primed in Great Britain
Oxygen and carbon isotope stratigraphy of early Cambrian carbonates in southeastern Newfoundland and England M. D. BRASIER*, M. M. ANDERSON! & R- M. CORFIELD* •Department of Earth Sciences, Parks Road, Oxford 0X1 3PR, U.K. f 6 Maypark Place, St John's, Newfoundland A1B 2E3, Canada
(Received 10 April 1991; accepted 31 October 1991)
Abstract - Carbonate rocks have been sampled through predominantly siliciclastic sediments above the Precambrian-Cambrian global stratotype level in southeastern Newfoundland to assess their potential for oxygen and carbon isotope stratigraphy. Comparable successions were sampled at Nuneaton and Comley in England. Greatly depleted S1SO signals are attributed to widespread thermal alteration during deep burial and granitic intrusion, including within the stratotype region. Carbon isotope ratios appear to have been less affected and these are described from nine sections. A provisional, composite
