scholarly journals Geomorphic responses of uplifted mixed sand and gravel beaches: combining short-term observations from Kaikōura, New Zealand with longer-term evidence

2021 ◽  
pp. 1-16
Author(s):  
Kate E. MacDonald ◽  
Deirdre E. Hart ◽  
Sebastian J. Pitman
Keyword(s):  
New Zealand ◽  
Short Term ◽  
Gravel Beaches ◽  
Sand And Gravel

Impacts of the Exxon Valdez Spill and Subsequent Cleanup on Intertidal Biota—1 Year Later

1991 ◽  
Vol 1991 (1) ◽  
pp. 467-475 ◽  
Author(s):  
Jonathan P. Houghton ◽  
Dennis C. Lees ◽  
William B. Driskell ◽  
Alan J. Mearns
Keyword(s):  
Random Sampling ◽  
Hot Water ◽  
Short Term ◽  
Exxon Valdez ◽  
Field Surveys ◽  
Upper Intertidal ◽  
Gravel Beaches ◽  
Sand And Gravel ◽  
Littoral Habitats

ABSTRACT A substantial amount of the crude oil which spilled from the tanker Exxon Valdez on March 24, 1989, was deposited on beaches in Prince William Sound. Major beach cleanup activities began in May and continued throughout the summer of 1989. Additional cleanup activities occurred during the summer of 1990. A study was conducted in 1989 to document the short-term impact to biota of hot water wash treatments. Additional field surveys were conducted in the summer of 1990 to evaluate recovery of littoral habitats from the effects of oiling and shoreline treatment. Stratified-random sampling was used to assess epibiota and infauna at 27 sites, representing several habitats and degrees of disturbance. Preliminary data evaluations indicate that treatment methodologies applied in 1989 had varied effects on intertidal assemblages. Some treated rocky beaches were stripped of flora and fauna at mid- and upper intertidal elevations and showed relatively little colonization by mid summer 1990. On other oiled rocky beaches that received less severe or no treatment, the majority of the community dominants remained in place and significant recolonization was underway. Protected sand and gravel beaches subjected to hydraulic treatments displayed greatly altered beach morphology. Finer sands and gravels were flushed from upper intertidal elevations, often burying the lower beach in several centimeters of sediment, resulting in major reductions in infauna in 1990. Oiled but untreated sand and gravel beaches had a rich and varied infauna. The effects of 1989 shoreline treatment activities on intertidal flora and fauna were significant and widespread and will greatly complicate assessment of the long-term impacts of the oil itself.

Beach cusp morphology on sand and mixed sand and gravel beaches, South Island, New Zealand

1999 ◽  
Vol 157 (3-4) ◽  
pp. 185-198 ◽  
Author(s):  
T.J. Nolan ◽  
R.M. Kirk ◽  
J. Shulmeister
Keyword(s):  
New Zealand ◽  
Gravel Beaches ◽  
Sand And Gravel ◽  
Beach Cusp

Motukoreaite, a new hydrated carbonate, sulphate, and hydroxide of Mg and Al from Auckland, New Zealand

1977 ◽  
Vol 41 (319) ◽  
pp. 389-390
Author(s):  
K. A. Rodgers ◽  
J. E. Chisholm ◽  
R. J. Davis ◽  
C. S. Nelson
Keyword(s):  
New Zealand ◽  
Olivine Basalt ◽  
Unit Cell ◽  
Rock Fragments ◽  
Alkali Olivine Basalt ◽  
Beach Rock ◽  
Wet Chemical ◽  
O 19 ◽  
Olivine Sand ◽  
Sand And Gravel

Motukoreaite occurs as relatively abundant, white, clay-like cement in both beach-rock and basaltic volcanic tuffs on the flanks of a small, extinct, late Pleistocene, basaltic cone at Brown's Island (Motukorea), within Waitemata Harbour, Auckland, New Zealand (36° 50′ S., 174° 35′ E.). The occurrence was originally recorded by Bartrum (1941) as ‘beach limestone’ found at two places of the island's shore. The beach-rock consists of a grain-supported fabric of poorly sorted, well-rounded, alkali-olivine basalt pebbles and granules, subangular to sub-rounded fresh olivine sand and abraded sand- and gravel-sized bioclasts in a colourless to pale yellow-green aphanocrystalline matrix of motukoreaite. Additional detritals include quartz, feldspar, and sedimentary rock fragments. Stereoscan examination of the surface of pieces of the cement prised from the beach-rock showed a box-work of plate-like crystals with a hexagonal form in which individuals measured about 3×3×0·02 microns (fig. 1).Wet-chemical analysis of a separate of the cement containing some 5 % quartz and traces of calcite and goethite gives SiO2 5·55, Al2O3 17·87, Fe2O3 0·73, CaO 0·92, MgO 22·98, MnO 0·70, ZnO 0·56, Na2O 0·71, K2O 0·10, CO2 9·32, SO3 10·00, H2O+ 19·62, H2O- 10·35, sum 99·41 %. The unit-cell formula using obtained unit-cell constants and measured specific gravity 1·43) is (Na0·73K0·07)∑0·80(Mg18·13Mn0·32Zn0·21)∑18·66Al11·15(CO3)6·22(SO4)3·97 (OH)51·1927·20H2O. Of several idealized formulae that may be proposed NaMg19Al12(CO3)6.5 (SO4)4(OH)54·28H2O is preferred.

Contesting Transnational Mobility among New Zealand’s Chinese Migrants from an Economic Perspective新西兰中国跨国移民的跨界经济活动及成因

2015 ◽  
Vol 11 (2) ◽  
pp. 146-173 ◽  
Author(s):  
Liangni Sally Liu ◽  
Jun Lu
Keyword(s):  
New Zealand ◽  
Online Survey ◽  
Transnational Migration ◽  
Well Being ◽  
Economic Perspective ◽  
Short Term ◽  
Republic Of China ◽  
Chinese Migrants ◽  
Transnational Mobility ◽  
Economic Revitalization

New Chinese migrants from the People’s Republic of China to New Zealand are renowned for their transnational mobility. Based on an online survey among this group of migrants, this paper aims to explore how economic factors in Chinese transnational migration play out in a way different from that posited by some conventional conceptions in migration studies. For example, compared with the conventional remittance flow that usually takes place from migrant-receiving countries to migrant-sending countries, this research finds a reverse remittance transaction channel among prc migrants. This reverse remittance flow is a manifestation of China’s economic revitalization, which benefited New Zealand, especially in the recent economic crisis. It was also found that economic reasons were not decisive in an immigrant’s decision to settle in New Zealand. However, economic reasons contributed significantly to their on-going movements after arriving in New Zealand. prc immigrants’ deciding to migrate or re-migrate reflects a layering of priorities that measure the short-term goal of maintaining economic livelihood against the longer-term goal of ensuring one’s family’s overall well-being.

In-situ Observations of Infragravity Response during Extreme Storms on Sand and Gravel Beaches

2020 ◽  
Vol 95 (sp1) ◽  
pp. 382
Author(s):  
Oliver Billson ◽  
Paul Russell ◽  
Mark Davidson ◽  
Tim Poate ◽  
Laurent Amoudry ◽  
...  
Keyword(s):  
In Situ Observations ◽  
Gravel Beaches ◽  
Sand And Gravel
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