Abstract
SUMMARYCruziana semiplicata (Salter) is recorded, generally in abundance, from previously known and new localities within Upper Cambrian (Ffestiniog) sediments in Snowdonia, and the Portmadoc area, North Wales. C. furcifera (D'Orb) is recorded for the first time in the British Isles from four localities within Lower Ordovician (Arenig) sediments on St. Tudwal's Peninsula, North Wales.It is shown that each of these species is of limited but different range, and it is suggested that they could be useful in distinguishing between otherwise unfossiliferous Cambrian and Ordovician strata.
Publisher
Cambridge University Press (CUP)
Reference12 articles.
1. Traces fossiles d'activite animale et leur signification palaeobiologique;Lessertisseur;Mem. Soc. géol. Fr.,1955
2. Summer field meeting to Western part of the Lleyn Peninsula
3. Palaeocurrent Directions in the Upper Cambrian of North Wales
4. Upper Cambrian trilobite ichnocoenosis from Wielka Wisniokwa (Holy Cross Mountains, Poland);Radwanski;Acta Palaeont. Pol.,1963
5. Srodowisko sedymentacyjne piaskowcow Kambryjskich Wisniowki i ich stosunek do facji fliszowej;Dzulynski;Annls Soc. géol. Pologne,1960
Cited by
25 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献