摘要:

The several methods for dating vo1canic formations are reviewed. They are: superposition (including the relationship to eustatic terraces), local and distant fossils, radiocarbon, petrology, paleomagnetism, weathering and erosion of rocks, and erosion of cones. The stratigraphic data of the many volcanic formations north-west of the Volcanic Belt are summarized in a figure and a table.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423161

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The Alpine Fault intersects the west coast of the South Island of New Zealand about four miles north of Dale Point at the entrance to Milford Sound; moraine on the west of the fault has beeili faulted against Fiordland Gneiss on the east, A well defined fault trace was followed from the air from the south side of Lake McKerrow through the east side of a huge eroded crush zone in the Kaipo River to the contact between moraine and gneiss at Stripe Point. The fault trace interrupts topography that probably formed during the last glaciation. The major displacement is dextral transcurrent and similar in direction and amount to that on the fault in the north, the valley of Kaipo River being displaced about a mile. The Alpine Fault is thus a major transcurrent fault at its southern limit on land with essentially the same character as along the western side of the Alps to the north.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423162

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

One hundred and fifty-six water samples from 17 localities in the Lower Buller Gorge were analysed for uranium.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423163

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The graded beds of the Mahoenui formation (Upper Oligocene) are confined to a fairly narrow zone with a north-south trend; narrow in the north (south-east of Te Kuiti) and broadening out to the south on either side of Taumarunui. The beds are graded from fine to medium argillaceous sandstone at the base to silt or clay at the top. The orientation of plant fragments and the under surfaces of sandstones commonly show linear features which have a very marked north-south trend. Flute casts are usually weak to absent. Where present, they show anomalous directions for the source of supply of the sediments. Many flute casts suggest a sediment origin in the south, but others, combined with current bedding on the flanks of the area, and overturning of convolutions within the sandstones, indicate a northern source of supply. Considering all the available data, it is suggested that a northern source area for the sediments is more probable. The graded beds are interpreted as having been deposited, in part, by turbidity currents initiated by the flooding of a major river flowing from the north.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423164

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The greater proportion of heavy grains in the Permian to Jurassic sedimentary rocks are either stable detrital minerals which have survived intrastratal solution, or authigenic minerals produced hy diagenetic alteration. Mineralogical elements of detrital origin in the rocks represent a wide variety of provenance areas. There are strong flushes of certain mineral groups of igneous oriRin, but these minerals have been partJly altered by percolating solutions. The combined effects of sedimentary processes during deposition, and post-depositional diagenesis, have produced in these Permian-Jurassic rocks a relatively stahle heavy mineral assemblage containing zircon, tourmaline, apatite, and authigenic granular epidote.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423165

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Extensive F-region ionospheric disturbances were recorded at the New Zealand ionospheric stations at Rarotonga, Christchurch, and Campbell Island followingthe Johnston Island nuclear explo5ions. From these records, as well as from magnetic recordings made at adjacent stations, the characteristics of the ionospheric movements, and of the gaseous wave which generated them have been deduced. The ga5eous wave appears to be a surface wave with velocity greater than that of sound and it has some of the characteristics of a normal shock wave.

ISSN:0028-8306    

DOI:10.1080/00288306.1959.10423166

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor