摘要:

The development of previous interpretations of the structure of the Otago schists is outlined. Structural terms are defined, metamorphic structures described, and their interrelations discussed.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423606

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

Burial metamorphism has produced many secondary minerals in Tertiary volcanic and sedimentary rocks from western Viti Levu, Fiji. Secondary assemblages include: albite-epidote—chlorite—sphene, albite—sericite—chlorite—prehnite—pumpdlyite—quartz, mordenite(?)—quartz—celadonite, and chabazite with a phyllosilicate and any two of thomsonite, phillipsite, and analcime. The primary fabrics of the host rocks are usually unchanged.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423607

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

During the D.S.I.R. expedition to White Island in January 1947, plant fossils were discovered in bedded tuffaceous sands on the south side of the island, about 17 chains north-west of Ohauora Point. On this and other coastal headlands a formation of well bedded tuffaceous sands, locally including water-worn pebbles, is exposed from high-tide level to a height of at least 15 ft; it apparently represents marine sediments now raised above sea level, either deposited during the Last Interglacial when sea level stood at a higher level than at present, or uplifted by tectonic movements. The discovery was mentioned by Hamilton (1959) in a botanical paper and is here drawn to the attention of geologists.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423608

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

In March 1961, Mr H. S. Gair, N.z. Geological Survey, Christchurch, forwarded a collection ofTerebellina mackayi(Bather) from argillite of the Torlesse Group on the east side of the road bridge over the Cascade Glen Stream at Redcliffe Hill, at the northern end of Mount Hutt Range, near Lake Coleridge. The collection also included a small ammonite aptychus, the first record of a cephalopod fossil from the Triassic geosynclinal strata of the Torlesse Group. The collection is numbered S73/504 (GS 7842; grid reference 988748).

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423609

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

Fossils are rare in the indurated sediments forming the axial ranges of the North Island, classed as “undifferentiated greywackes of Jurassic-Permian age” in the Geological Map (1958), but which may be correlated with Suggate's Torlesse Group (1961) of the South Island. It is therefore worth while drawing attention to the following recent finds (Fig. 1).

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423611

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

A single specimen of the polyzoan“Monotrypella” maoricaWilckens has been identified in a sample collected by Mr Guyon Warren, Geological Survey, Christchurch. Locality details are as follows: GS9004; S59/532; grid ref.ca.072246; boulder in Halpin Creek, at main road bridge, two miles south of Arthurs Pass township (Fig. 2).Monotishas been found in a number of places nearby.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423612

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

Although the rocks of Tongariro National Park have been mapped and their petrograplty is reasonably well known, little attention has so far been paid to their physical character and modes of eruption. Lava, scoria, and ash are the most common types, though hot avalanches that erupted in 1949 and 1954 have been described by Battey (1949) and Gregg (1960). These left round the base of Ngauruhoe deposits that are still recognisable. Gregg (1960) has also referred to a spatter-cinder cone built within the crater of Ngauruhoe by lava fountaining.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423613

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

Petrological examination of rocks from Cuvier Island (N.Z.M.S. 1, Sheet N36) collected by Messrs J. Healy and B. N. Thompson of the Geological Survey has indicated that certain contact rocks are highly tourmalinised (P 12992, 12993, 23185* A brief account of this discovery is incorporated in theGeological Map of New Zealand 1 : 250,000, Sheet 2B, Barrier, where it is stated, “The western end of Cuvier Island is composed partly of Moehau Formation siltstone metamorphosed to hornfels by quartz porphyry and plutonic intrusives. Both the hornfels and a large part of the intrusive rocks have been tourmalinised, silicified, and carbonated.” (Thompson, 1960.) The intrusive rocks are noritic quartz gabbros, biotite-augitequartz gabbros and quartz diorites, and can be correlated with similar rocks on Coromandel Peninsula (“Paritu Tonalite”).

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423614

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

A small specimen of light-blue beryl, recently discovered in the Canaan area by Mr E. J. Sixtus and kindly presented by him to the New Zealand Geological Survey, is of interest not only as an addition to the few records of this mineral in New Zealand but also because of its unusual properties. Because of the small size of the specimen, the full nature and extent of zoning in the beryl are unknown, but the data obtained are of interest.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423615

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor

摘要:

To clarify local stratigraphy near Silverdale, 20 miles north of Auckland (Fig. 6), the Geological Survey asked the Geophysics Division to drill a hole along Duck Creek Road, near its junction with Spur Road, 1½ miles south-east of Silverdale.

ISSN:0028-8306    

DOI:10.1080/00288306.1963.10423616

出版商:Taylor & Francis Group    

年代:1963

数据来源: Taylor