摘要:

Repeat measurements of chloride, electrical conductivity and pH of samples from 11 selected springs in Wairakei Geyser Valley have indicated a downward trend in both chloride content and electrical conductivity since the measurements were initiated in 1953. Changes of pH have been irregular. The recorded effects are shown to be consistent with a decrease in the amount of primary chloride water feeding the area.

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423599

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

A new pleurotomariidMellariumgen. nov. occurs in the Anisian (Middle Triassic) of the Southland Syncline. Superficially the new genus is similar to Shansielia Yin, a late Paleozoic gastropod. Two new species ofMellariumare described,M. mutchi, from lower Etalian greywacke, and underlying breccias, andM. nodulosum, from the upper Etalian. A crushed gastropod from the upper Countess Formation of the Eglinton Valley is possibly conspecific withM. mutchi

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423600

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Series in the Triassic were introduced by Marwick (1951) “largely [for] …mapping requirements”, a grouping of several stages being a more mappable unit than a single stage, especially on small scale maps. The decision of the New Zealand Geological Survey to use series as the units in the 4-mile mapping project bears out the usefulness of these units.

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423601

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Fold axes in the steeply dipping greywackes and schists to the west of the Alpine divide may be located by determinations of the superposition of beds made from observations of: (1) graded bedding; (2) intraformational structures; (3) contemporaneous deformation structures; (4) crossbedding; (5) slip folds; (6) drag folds and minor folds: (7) axial plane cleavages, joints and quartz veins; and (R) feather ioints. Both joints and fault patterns have been demonstrated to be statistically related to the fold axes by means of equal area projections. The fold axes trend between 40° and 50° and locally diverge southward from the Alpine fault whose strike is 58°. Petrofabric study of calcite optic axes from marble shows a preferral orientation nearly normal to the Alpine fault. The direction of maximum principal stress during deformation inferred from fold axes and Joints is about 310° , while that inferred from the attitude of the Alpine Fault and the calcite orientation is about 327°, but it is not thought that the difference is significant,

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423602

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

The stratigraphy and structure of the Flat Point area, eastern Wairarapa is described and illustrated by a map. Strata in upward succession are: Mokoiwian greywackes with spilites; Ngaterian to Piripauan graded-bedded sandstone, siltstone and conglomerate; Haumurian and Teurian brown siltstone with glauconitic sandstone; Lower Dannevirke limestone and greensand; Upper Dannevirke and Bortonian bentonitic siltstone and greensand; Pareora and Southland alternating sandstone and siltstone.

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423603

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Three isolated remnants of Tertiary strata crop out in the Upper Grey Valley. In Clarke River and at Staircase Creek there is Landon limestone and sandy limestone; between Clarke River and Allan Water an infaulted sequence includes, in upward succession, coal measures, Whaingaroan calcareous siltstone and mudstone, and unconformably overlying breccias and grits, and Waitotaran-Nukumaruan Coal measures.

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423604

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Marine inliers at Dowling Bay — Waipuna Bay and Blanket Bay on the northern shores of Otago Harbour are of Waiauan, or at youngest, early Tongaporutuan age. They contain mixed basaltic and trachytic tuffs of the Initial Eruptive Phase at a number of horizons among their upper members, thus fixing the date of initiation of volcanic activity. The beds pass conformably upwards into basaltic tuffs followed by flow-rocks of the First Major Eruptive Phase. The sediments comprise massive and laminated micaceous sandstones, calcareous sandstones and fetid limestones (Dowling Bay Limestone) as well as the interbedded water-lain tuffs. All these, up to the top of the highest sandy layer at Waipuna Bay, are grouped as the Waipuna Bay Formation. They are derived mostly from the Otago schists, but contain minor microcline of granitic or high-grade metamorphic parentage. Outward dips of the sediments and overlying volcanics are ascribed to doming by magmatic intrusions.

ISSN:0028-8306    

DOI:10.1080/00288306.1960.10423605

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor