摘要:

Primary carbonate‐bearing lamprophyric rocks have been recognised in the Walloway Diapir, South Australia. Their petrography and trace‐element geochemistry indicates that they have carbonatitic affinities. The rocks are magnetic and can be detected by ground magnetometer surveys.

ISSN:0016-7614    

DOI:10.1080/00167617208728808

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

A study of the Narrabeen Group in the southern part of the Sydney Basin has provided a more complete understanding of the conditions of deposition in the area during the Lower Triassic. The sedimentology of the sequence indicates that several different types of fluvial deposits are represented, with an upward succession from piedmont conditions with braided streams to a swampy deltaic plain. This sequence is interpreted as the onshore portion of a slow marine transgression, probably brought about by declining erosive activity in the hinterland.

ISSN:0016-7614    

DOI:10.1080/00167617208728809

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

ISSN:0016-7614    

DOI:10.1080/00167617208728797

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor