摘要:

Bolivinita quadrilaterais a long-ranging species of relatively stable morphology that intermittently inhabited the New Zealand region and developed locally abundant populations in the upper Miocene (Tongaporutuan Stage), lower Pliocene (Opoitian and Waipipian Stages), and about the Pliocene-Pleistocene boundary (Mangapanian and Nukumaruan Stages). Many of the occurrences are from deep-water (outer “shelf” to bathyal) biotopes, and bathymetry may have been a major control over its stratigraphic distribution. Populations previously distinguished asB. granttayloriare considered to be conspecific withB. quadrilatera. Although spiral profiles inB. quadrilateraare mainly quasi-rectangular, a few are rhomboidal as inB.cf.pohana. There is some evidence in support of a morphocline between these taxa, but population distributions in Tongaporutuan strata suggest that they were distinct, although occupying comparable biotopes. The localised distribution ofB. quadrilatera, even in favourable, deep-water biotopes is a restriction on its use as a criterion for the base of Tongaporutuan Stage.

ISSN:0028-8306    

DOI:10.1080/00288306.1979.10424160

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Pseudaucella marshalli, the index species of Ururoan Stage (Pliensbachian-Toarcian), is recorded for the first time from Canterbury Suite (≡ Torlesse Supergroup) rocks of the South Island. Its discovery is further evidence against the assumption that fossil zones characteristic of Murihiku Supergroup are absent from Canterbury Suite.

ISSN:0028-8306    

DOI:10.1080/00288306.1979.10424161

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Gravity observations suggest that Mesozoic basement rocks are thrust south to south-eastwards over Tertiary sediments in eastern Southland, New Zealand. The angle of thrust may be as low as 30° north of Pebbly Hills.

ISSN:0028-8306    

DOI:10.1080/00288306.1979.10424162

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

ISSN:0028-8306    

DOI:10.1080/00288306.1979.10424163

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

ISSN:0028-8306    

DOI:10.1080/00288306.1979.10424164

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor