ISSN:0016-7614    

DOI:10.1080/00167615608728465

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

Chlamys (Zygochlamys) heardensisn. sp. is described from specimens collected from the Drygalski Agglomerate of Heard Island. Its relationships with other large forms of SubantarcticChlamys,fossil and living, indicate that the agglomerate is Neogene in age, probably post‐Miocene and perhaps Pliocene.

ISSN:0016-7614    

DOI:10.1080/00167615608728466

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

Streams on an ancient peneplain (probably Cretaceous) were rejuvenated, and excavated youthful valleys. Gold was included in the thin, generally coarse, poorly‐sorted sediments of these streams. Further tectonic movements stopped erosion in thalwegs and instituted regional accumulation of lacustrine sediments which extended far beyond the old stream channels. Continued movements resulted in three or more cycles of sedimentation over a wide area on what is now the Kiandra Tableland, each beginning with a sandy phase and ending with a lignite phase. In places, the succession is intercalated with flows of olivine basalt. The present residuals are remnants of extensive lava fields which concluded the cyclic sedimentation, and have preserved the sediments. The sediments and lavas cross the present Divide, and must precede its formation.

ISSN:0016-7614    

DOI:10.1080/00167615608728467

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

摘要:

The origin of granite

ISSN:0016-7614    

DOI:10.1080/00167615608728468

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

ISSN:0016-7614    

DOI:10.1080/00167615608728469

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor

ISSN:0016-7614    

DOI:10.1080/00167615608728464

出版商:Taylor & Francis Group    

年代:1956

数据来源: Taylor