CARBONIFEROUS AND PERMO-CARBONIFEROUS ROOKS, N.S.W. 249 



Previous Observers. 



1. A former Government Geologist of New South Wales, 

 O. S. Wilkinson, following the results of extensive trench- 

 ing done by the late Examiner of Coal-fields, John Mac- 

 kenzie, and extensive observations by the late Rev. W. B. 

 Clarke, showed a large development of Carboniferous strata 

 on the geological map published by the Mines Department of 

 New South Wales (Mineral Products N. S. Wales, 1887). 



2. Professor David in 1893 called the upper part of the 

 Carboniferous rocks the Rhacopteris Series, and the lower 

 the Marine Carboniferous Series (Aust. Assoc. Adv. Sci., 

 1893). 



3. In 1901 Mr. J. B. Jaquet 1 made a detailed examination 

 of the ironstone deposits of Carboniferous age of the 

 Clarence Town District. He described the ironstone 

 deposits and also the limestone deposits in considerable 

 detail and his report is accompanied by an excellent 

 geological map. The other strata are only referred to 

 briefly. 



Mr. Jaquet classed the whole of the Carboniferous strata 

 of this district as Upper Carboniferous, including in this 

 term both the marine beds and the fresh-water Rhacopteris- 

 bearing beds. He estimated the Carboniferous strata 

 examined by him to have a thickness of 19,000 feet, and 

 his section did not include either the top or the bottom of 

 the formation. There is, probably, considerable repetition 

 in Mr. Jaquet's section, due to strike faulting, and the 

 inter-stratification of marine and fresh-water beds shown 

 by him is probably also due to the same cause. Mr. Jaquet 

 gives a list of previous observers, and there is no need to 

 repeat that list here. 



1 The Iron Ore Deposits of N. S. Wales by J. B. Jaquet, a.r s.m., f.g.s., 

 Memoir No. 2 of Geol. Surv. N. S. Wales, p 62, 1901. 



