摘要:

A landing, followed by observations from a fishing launch, has shown that the Solander Islands are erosional remnants of a maj or volcano consisting of dacitic hornblende-biotite-andesite in the form of lava, tuff, agglomerate, and dykes. Indirect evidence suggests that the rocks are about Upper Pleistocene in age, but more direct evidence might be obtained if ash-showers are found in the sediments of Foveaux Strait and of Stewart Island and the South Island, New Zealand. The volcanism is curiously isolated, the nearest comparable rocks of Tertiary or Quaternary being at Mt. Egmont, 640 miles to the north-north-east. This isolation is a problem of Quaternary tectonics.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422772

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Bedded uraniferous deposits have been discovered in the middle (?) Cretaceous Hawks Crag Breccia formation of the lower Buller Gorge region of the South Island of New Zealand, and in three areas to the south (Bullock Creek, Waitahu River, and Fox River mouth). The characteristic feature in all the areas is the restriction of the mineralization to the arkosic facies of the Hawks Crag Breccia.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422773

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

The basalt surrounding a tree mould in a flow from Mt. Wellington, Auckland, has been found to contain native iron produced by reduction of ore. Shrinkage cracks in the charcoal within the mould have been invaded by an alkali-rich residuum of the basalt, thus providing a small-scale example of “filter-press” differentiation.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422774

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Submarine eruptions were reported on 1 December 1877 near East Cape. They were probably not of volcanic origin, and may have been a tsunami.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422775

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

In a small area at the southern end of Bluff Harbour, which has been explored by submarine drilling, a thin sequence of moderately compacted late Tertiary terrestrial and estuarine beds rests on a basement of Paleozoic intrusive and metamorphic rocks, and is overlain by uncompacted Recent estuarine sands. The basement rocks are decomposed to a depth of 45 It beneath the Tertiary beds which also have undergone a similar type of decomposition with leaching. The Tertiary beds are Taranakian or lower Wanganui in age (upper Miocene to Pliocene).

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422776

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

The theory of late Pliocene warmth is of some importance in explanation of Southland pedimentation and also of the deep weathering of greywackes at Wellington, where the K Surface, though of late date, may, like the “peneplains” of Tertiary ages in Europe, have been planed in a warm-humid, or “tropical” climate.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422777

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

A simple analysis of variance model is applied to the problem of assessing whether or not homogeneous populations of Foraminifera exist within a lithologic unit. Experimental results show that while for some species samples were drawn from common populations, there were others for which sampling indicated heterogeneity. This heterogeneity tended to be generated in the stratigraphic dimension and the hypothesis is advanced that this is due to differential rates of sedimentary influx. The practice of taking single samples from beds or from wide stratigraphic intervals in uniform lithologies is considered unsafe for generalizations concerning the distribution of populations within the sampling interval.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422778

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Waitemata Formation strata of probable Otaian age, unconformably overlie a highly irregular, unweathered surface cut in rocks of Mesozoic age. A tuffaceous sandstone within the former is correlated with the Parnell Grit horizon. It contains large blocks of Waitemata sandstoie and mudstone.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422779

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

A structure in the young Tertiaries of the Patoka district, northern Hawke's Bay, is anomalous when the area is compared topographically with districts further north and south. A faulted body consisting of greywackes of probable Jurassic age, has, pushed the Tertiary and its lower Pleistocene cover up, and initiated the local anomalous topography. The action started in Nukumaruan time. The movement had a mild southern component causing, disturbance in the area immediately north of the Opau greywackes.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422780

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Some features of the bed of Waitemata Harbour are described and four cross profiles of the main stream are presented. The profiles afford evidence of an interval of stillstand during the Last Glaciation or earlier at an elevation approximately 30 feet below modern sea-level.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10422781

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor