Lagoon subsidence and tsunami on the West Coast of New Zealand     

S.L. Nichol  J.R. Goff  R.J.N. Devoy  C. Chagu-Goff  B. Hayward  I. James 《Sedimentary Geology》2007,200(3-4):248-262

Sediment core and trench data from a coastal lagoon on the West Coast of the South Island, New Zealand are used to investigate evidence for co-seismic subsidence and associated tsunami inundation. Physical data are used to document a salt marsh soil buried  80 cm below the modern sediment surface that is locally covered by a gravelly sand bed. The sediment record also contains geochemical and biological (diatom and foram) evidence for abrupt changes in salinity of lagoon waters that link to subsidence, tsunami flooding and to the open versus closed state of the lagoon tidal entrance. At the local scale, these relationships allow for separation of tsunami evidence from other agents of environmental change in the lagoon. We also propose a conceptual connection between these local changes and regional drivers of landscape development, most notably major earthquakes and resultant pulses in sediment supply to the coast.  相似文献   

Report of a field meeting in the Leith Hill District: 22nd June, 1929     

H.A. Hayward 《Proceedings of the Geologists' Association. Geologists' Association》1930,41(2):212-216

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Environmental protection: Regional approaches     

Peter Hayward 《Marine Policy》1984,8(2):106-119

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Fault growth at a nascent slow-spreading ridge: 2005 Dabbahu rifting episode, Afar   总被引：3，自引：0，他引：3  

J. V. Rowland  E. Baker  C. J. Ebinger  D. Keir  T. Kidane  J. Biggs  N. Hayward  T. J. Wright 《Geophysical Journal International》2007,171(3):1226-1246

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新疆伊犁吐拉苏地区的线性构造及控矿特征   总被引：4，自引：0，他引：4  

肖龙  HaywardNick 《地球科学》2003,28(2):191-195

采用多种数值图像进行线性构造解译，其中DEM和NOAA主要用于区域尺度，TM用于勘探区尺度，地面磁法数据用于靶区范围的解译分析。研究认为该区线性构造与金矿床的空间分布关系密切，表现为：（1）区域尺度的一级控矿构造为NEE、NE和NW向构造的交汇部位；吐拉苏地区的一级控矿构造为WNW和NNW及NE方向构造的交汇部位；（2）吐拉苏地区的次级控矿构造为NNE和环形构造的交汇部位；（3）靶区的一级控矿构造为NE、SN和环形构造。线性构造异常分析结果显示，当线性构造的优益度大于40时，有较大的成矿可能性。  相似文献   

Field meeting in the Epping forest district: Sunday, 9th May, 1948     

John F. Hayward  Ph.D.  M.Sc  F.G.S. 《Proceedings of the Geologists' Association. Geologists' Association》1949,60(3):222

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Introduction to ‘The 1997–8 El Niño Atlas of oceanographic conditions along the west coast of North America (23°N–50°N)’     

C. G. Castro  T. R. Baumgartner  S. Bograd  R. Castro  F. P. Chavez  C. A. Collins  R. Durazo  J. García  G. Gaxiola-Castro  T. Hayward  A. Huyer  R. Lynn  A. S. Mascarenhas  M. R. D. Robert  R. L. Smith  P. A. Wheeler  F. A. Whitney 《Progress in Oceanography》2002,54(1-4)

Hydrographic data collected along the West Coast of North America between January 1997 and January 1999 have been compiled into a web-based Atlas of the 1997–8 El Niño event. This paper discusses the organization of the Atlas, describes the data that were incorporated into the Atlas and explains how vertical and horizontal distributions for the different properties were constructed. Examples of figures from the Atlas are shown.  相似文献   

Spectrocam-10 Thermal Infrared Observations Of The Dust In Comet C/1995 O1 Hale-Bopp     

Hayward  T. L.  Hanner  M. S. 《Earth, Moon, and Planets》1997,78(1-3):265-270

We describe 5 to 18 μm broadband images and R ∼ 100 spectra of comet Hale-Bopp taken with SpectroCam-10 on the 5 m Hale telescope during six runs between 1996 June and 1997 April. Our data show the gradual warming of dust grains as the comet approached perihelion. In June, the 10 μm silicate emission feature was already stronger than observed in any other comet, and it increased to about 3 times the continuum level near perihelion. Spectral structure attributed to a crystalline olivine grain component remained relatively constant, but other features associated with pyroxenes appeared to vary with heliocentric distance. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Effect and timing of increased freshwater runoff into sheltered harbor environments around Auckland City, New Zeland     

Bruce W. Hayward  Hugh R. Grenfell  Ashwaq T. Sabaa  Margaret S. Morley  Mark Horrocks 《Estuaries and Coasts》2006,29(2):165-182

Two short cores of late Holocene, low tidal, estuarine sediment from the sheltered fringes of the Auckland's Waitemata Harbor, New Zealand, record the following changes through time since human colonization: an abrupt decline and disappearance of marine molluscs, a major decline and virtual disappearance of ostracods, an abrupt decline in calcareous foraminifera (mostlyAmmonia spp.), a rapid increase, in abundance of agglutinated foraminifera, large diatoms, and freshwater thecamoebians, and an increase in sedimentation rate, but no consistent trend in change of grain size. The up-core foraminiferal changes mimic their present day up-estuary zonation, which correlates strongly with decreasing salinity and pH. In both localities the faunal changes can be correlated with the documented local land-use history and increased freshwater runoff over time. At the head of the Waitemata Harbor, in Lucas Creek estuary, three phases of foraminiferal faunal change occurred: minor changes during initial Polynesian forest clearance (1500–1800 AD), a major change in early European times (1840–1870 AD) with clearance of most of the remaining native forest, and another small change in very, recent times (∼1990s) with urbanization in the Lucas Creek catchment. On the eastern, seaward fringes of the Waitemata Harbor, in the smaller Tamaki Estuary, no faunal changes occurred in association with complete forest clearance and establishment of pastoral farming in Polynesian and early European times (before 1950s). Major foraminiferal and other faunal changes occurred in the late European period (1960s–1970s) coincident with the onset of major urbanization spreading throughout the Tamaki catchment. Our results suggest increased freshwater runoff is the major culprit for many of the observed biotic changes in the urbanized estuaries of New Zealand.  相似文献   

High-resolution provenance determination of construction-stone: A preliminary study of Corinthian oolitic limestone quarries at Examilia     

Chris L. Hayward 《Geoarchaeology》1996,11(3):215-234

At least 1.5 × 10⁶ m³ of oolitic limestone from the Corinthia was quarried during antiquity, mainly for construction. Previously, it has only been possible to speculate about the sources of oolite in ancient constructions because of its uniformity on the macroscopic scale. However, thin section petrography demonstrates a considerable degree of petrographic variation within the oolite of one group of quarries at Examilia, 4.5 km ENE of Ancient Corinth. Variation in the characteristics of the ooids and the amount and types of noncarbonate grains in the oolite from different quarries permit the identification of five petrographically distinct zones in the Examilia quarries. This offers great potential as a high resolution provenancing tool, and the data have numerous other archaeological applications. Following these results, the work has been extended to become a comprehensive study of all Corinthian oolite quarries. © 1996 John Wiley & Sons, Inc.  相似文献