title: Re-anchoring the late Pleistocene tephrochronology of New Zealand based on concordant radiocarbon ages and combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He zircon ages

authors: Danišík, Martin

subjects: (U-Th)/He dating

abstract: The caldera-forming Rotoiti eruption from Okataina volcano was one of the largest rhyolite events of the last 100ka in the Taupo Volcanic Zone, New Zealand. Its associated widespread tephra layer (Rotoehu tephra) is a significant time marker in terrestrial-marine paleoclimate correlation studies in the SW Pacific. However, the accurate and precise age of this eruption, and of the subsequent, smaller volume Earthquake Flat (EQF) eruption, has been the subject of controversy despite numerous studies. We have applied combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He dating of zircon from Rotoiti and EQF deposits, and obtained overlapping ages of 45.1(7)±3.3ka and 45.1(6)±2.9ka, respectively. These results are supported by new and published high-precision radiocarbon data bracketing the age of the Rotoiti eruption between 44.8±0.3 and 47.5±2.1ka cal BP. These age data are also in good agreement with a range of previously published estimates based on paleoclimate (palynology), luminescence dating of enclosing sediment, and sedimentation rates in terrestrial and marine settings. However, these results are at variance with a commonly quoted age of ~60ka, largely constrained by a single ⁴ºAr/ ³⁹Ar age of an overlying glassy lava flow at a distal tephra site. This study demonstrates the potential for combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He dating of zircon in tephra and other volcanic deposits to provide age control in the 40-100ka time interval, a period difficult to constrain using more traditional radiocarbon, K/Ar and ⁴ºAr/ ³⁹Ar methods.

text: Re-anchoring the late Pleistocene tephrochronology of New Zealand based on concordant radiocarbon ages and combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He zircon ages The caldera-forming Rotoiti eruption from Okataina volcano was one of the largest rhyolite events of the last 100ka in the Taupo Volcanic Zone, New Zealand. Its associated widespread tephra layer (Rotoehu tephra) is a significant time marker in terrestrial-marine paleoclimate correlation studies in the SW Pacific. However, the accurate and precise age of this eruption, and of the subsequent, smaller volume Earthquake Flat (EQF) eruption, has been the subject of controversy despite numerous studies. We have applied combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He dating of zircon from Rotoiti and EQF deposits, and obtained overlapping ages of 45.1(7)±3.3ka and 45.1(6)±2.9ka, respectively. These results are supported by new and published high-precision radiocarbon data bracketing the age of the Rotoiti eruption between 44.8±0.3 and 47.5±2.1ka cal BP. These age data are also in good agreement with a range of previously published estimates based on paleoclimate (palynology), luminescence dating of enclosing sediment, and sedimentation rates in terrestrial and marine settings. However, these results are at variance with a commonly quoted age of ~60ka, largely constrained by a single ⁴ºAr/ ³⁹Ar age of an overlying glassy lava flow at a distal tephra site. This study demonstrates the potential for combined ²³⁸U/ ²³ºTh disequilibrium and (U-Th)/He dating of zircon in tephra and other volcanic deposits to provide age control in the 40-100ka time interval, a period difficult to constrain using more traditional radiocarbon, K/Ar and ⁴ºAr/ ³⁹Ar methods.

year: 2012

title: Physical education and sport in schools: policies and pedagogy

authors: Penney, Dawn

subjects: physical education

abstract: This special issue of European Physical Education Review directs attention to the exploration of contemporary relationships between physical education (PE) and sport in schools from pedagogical perspectives. It reflects the dynamic policy landscape of PE and sport internationally and seeks to extend insights into the pedagogical issues, challenges and opportunities arising from contemporary policy contexts and amidst new curriculum developments in PE.

text: Physical education and sport in schools: policies and pedagogy This special issue of European Physical Education Review directs attention to the exploration of contemporary relationships between physical education (PE) and sport in schools from pedagogical perspectives. It reflects the dynamic policy landscape of PE and sport internationally and seeks to extend insights into the pedagogical issues, challenges and opportunities arising from contemporary policy contexts and amidst new curriculum developments in PE.

year: 2010

title: Local volunteers respond to the Rena oil spill in Maketū, New Zealand

authors: Smith, Kelly

subjects: community action

abstract: Following the MV Rena grounding and oil spill in the Bay of Plenty, New Zealand in October 2011, the Māori community of Maketū were quick to respond to the arrival of oil on their beaches. They asserted their rangatiratanga by establishing their marae as a base and successfully coordinated a cleanup by more than 450 volunteers, feeding these volunteers every day. We interviewed 11 clean-up leaders and volunteers in Maketū to gather information about how the oil spill affected people in the community and how they ensured the success of their clean-up efforts. Many volunteers returned to help with the clean-up day after day over several weeks. Concepts of kaitiakitanga and manaakitanga underpinned the work of the Maketū clean-up organisers. Participants attributed the success of the Maketū clean-up to the speed with which they responded, the support they received from their community and local businesses, and their local knowledge.

text: Local volunteers respond to the Rena oil spill in Maketū, New Zealand Following the MV Rena grounding and oil spill in the Bay of Plenty, New Zealand in October 2011, the Māori community of Maketū were quick to respond to the arrival of oil on their beaches. They asserted their rangatiratanga by establishing their marae as a base and successfully coordinated a cleanup by more than 450 volunteers, feeding these volunteers every day. We interviewed 11 clean-up leaders and volunteers in Maketū to gather information about how the oil spill affected people in the community and how they ensured the success of their clean-up efforts. Many volunteers returned to help with the clean-up day after day over several weeks. Concepts of kaitiakitanga and manaakitanga underpinned the work of the Maketū clean-up organisers. Participants attributed the success of the Maketū clean-up to the speed with which they responded, the support they received from their community and local businesses, and their local knowledge.

year: 2016