摘要:

Sedimentary rocks within the Whangaparaoa area are divided into two groups. Of these, one group and three formations are newly established and one formation is redefined; another previously accepted formation is discarded. Poorly exposed, unfossiliferous Haumurian-Teurian sediments are included within the Mangatu Group which is not further subdivided. Coarse lithologies which grade up the stratigraphic sequence into interbedded thin sandstones and grey mudstones containing basal Miocene microfaunas are included within the Whakai Formation. The Wharekahika Formation, which was erected by Ongley and MacPherson in 1928 and regarded as of probable Pliocene age, is discarded because it cannot now be readily identified and the fauna listed for it is likely to be a mixed one. Strata of the Runaway Group which crop out over large portions of the Whangaparaoa area comprise two formations—the Te Kahika Formation of Opoitian age and the Whangaparaoa Pumiceous Sandstone of Opoitian to ? Waipipian age. Fossiliferous Castlecliffian lithologies of two small, widely separated outcrops are included as separate members of the Waipaoa Formation. Within one member is the richly fossiliferous Te Piki Bed which contains an excellently preserved, diverse, Aotea zone fauna. Middle to Upper Pleistocene deposits underlying terraces at 63 m and 33 m, and other undifferentiated levels, constitute the Rukuhanga Formation.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422453

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A crustal section across the Tasman Sea between latitudes 31° S and 35° S has been obtained by interpreting continuous gravity measurements with the aid of previous seismic measurements. A quasi-continental type of crust exists under the Dampier Ridge (crustal thickness 20 km), Lord Howe Rise (26 km), West Norfolk Ridge (21 km), and Norfolk Ridge (21 km). The crust beneath the New Caledonia Basin is of oceanic type (9 km).

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422454

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Gravity measurements suggest that the earth's crust has a thickness of about 20 km beneath the south-eastern margin of the New Caledonia Basin. From a point 50 km within the edge of the New Zealand continental shelf the crust thickens to a maximum value of about 36 km near the Marlborough Sounds. Residual gravity and magnetic anomalies indicate that a broad belt of dense, magnetic rocks underlies the South Taranaki Bight but does not appear to extend beneath Taranaki Province. These rocks may be either Paleozoic intrusives similar to those found in the South Island, Or Pleistocene volcanics similar to Egmont Andesite.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422455

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Predation is an important factor in the food web of living organisms. Prey-predator relationships are delicately balanced and over a short period may greatly modify populations and communities. Whereas evidence of predation amongst living organisms is obvious, evidence from fossil assemblages is difficult to document even though predation must have been occurring continuously. Only rarely does a paleontologist see direct evidenoe of predation such as the mosasaur bites on an ammonoid shell described by Kauffman and Kesling (1960).

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422456

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

When Dr C. R. Laws (1936) revised the Pliocene faunule at Kaawa Creek, on the west coast of Auckland 8 miles south of Waikato Heads, he added to the list of bivalves the speciesBassina parvaMarwick, on the basis of four left valves which he stated were more elongate and lighter in the hinge but otherwise agreed well with topotypes. When Marwick (1927) describedB. parvafrom Okauawa Creek, Hawke's Bay (Nukumaruan), he wrongly stated that his illustrations (pl. 47, figs. 153, 155) were natural size, but they are in fact twice the dimensions of the holotype, an error that doubtless influenced Laws in his identification of the larger specimens from Kaawa.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422457

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Glibert and Van de Poel (1967, p. 38) placedLucina concinnaDeshayes, 1857 in the genusCavilucinaFischer, 1887 and in the subgenusMonitiloraIredale, 1930. On the next page they placedLoripes concinnaHutton, 1885 in the genusCavilucinaand in the subgenusGonimyrteaMarwick, 1929 (which was erected forLoripes concinna). Thus Hutton's name became a junior secondary homonym of Deshayes', and Glibert and Van de Poel (p. 39) renamed Hutton's speciesCavilucina(Gonimyrtea)exconcinna. Glibert and Van de Poel gave no references to earlier reviews of the Lucinidae that they might have followed in their drastic rearrangement of generic and subgeneric groups, so it is assumed that their classification expresses their own ideas on relationships in the family. New Zealand workers may not agree thatGonimyrteashould be ranked as a subgenus ofCavilucina, in which case they must follow Article 59 (c) of the Code, which states: “A name rejected after 1960 as a secondary homonym is to be restored as the valid name whenever a zoologist believes that the two species-group taxa are not congeneric ... ”.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422458

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

This note is published mainly to bring to the notice of Southern Hemisphere workers a recent important paper on size variation inHiatella arcticaby Strauch (1968), and the taxonomic implications of Strauch's work.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422459

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Retention of juveniles within the shell of the mother for some time after their emergence from the egg (ovoviviparity) occurs in several gastropod genera, and ddferent kmds of such brood protectIon have been outlined by Thorson (1946, p. 170, 186), Morton (1958, p. 124), and Fretter and Graham (1964, p. 155). Records of ovoviviparity in living members of the Turritellidae, however, seem to be quite rare, the only ones known to the writer being that of Peile (1922, p. 13) for t?e east AustralianTurritella gunniReeve and that of Iredale who supplied the specimens to Petie. Iredale (1924, p. 247) gave additional notes ongunniand proposed the genusGazamedafor it, citing “the characters of the protoconch, due to their viviparous habit” among the basic characters.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422460

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Three zones of radial lineations interpreted as faults are described on the lower slopes of Mt Egmont. Magma is considered to have ascended along three of the faults to form four cumulodomes—The Dome, Skinner Hill, and the two Beehives. Jointing patterns, concentric to the margins, suggest that the cumulodomes formed largely by internal growth.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422461

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

In the Kaka District the Cretaceous Separation Point Granite is unconformably overlain by Lower Tertiary sediments belonging to the Westhaven Group which is divided into four formations. The oldest formation, Motupipi, consisting of coal measures overlain by marine sands, is conformably overlain by algal limestone and sandstone of the Huia Formation. The Huia Formation is conformably overlain by massive fine-grained sediments of the Sherry River Formation which encloses a sequence of graded beds in the north, mapped as the Burmeister Formation. The contact of Lower Tertiary sediments and granite is depositional in the south, but in the north it is faulted along the Matariki Fault Zone. Faulting was preceded by folding of the Tertiary beds into two north-north-east trending folds, the Hope Anticline to the west and the Sherry Syncline to the east. Both the granite and Lower Tertiary rocks are unconformably overlain by non-marine beds belonging to the Tadmor Group. The Tadmor Group consists of the Upper Tertiary Glenhope Formation and the conformably overlying Lower Pleistocene Moutere Gravel. In the valleys a sequence of Upper Pleistocene aggradational gravels were deposited.

ISSN:0028-8306    

DOI:10.1080/00288306.1971.10422462

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor