title: Crossing new frontiers: extending tephrochronology as a global geoscientific research tool

authors: Abbott, Peter M.

subjects: Science & Technology

abstract: Tephrochronology is a unique stratigraphic tool for linking, dating, and synchronising geological, palaeoenvironmental, or archaeological sequences and events (Lowe, 2011; Alloway et al., 2013). It relies on the identification and tracing of tephra or cryptotephra horizons spatially between various depositional sequences. These horizons can provide stratigraphic event layers (tephrostratigraphy) and, when dated, isochronous age markers — since most tephra are deposited on a scale of days to weeks — that can be transferred from site to site (tephrochronology) (Lane et al., 2017b). The correlation of horizons between different sequences is reliant on matching the physical characteristics, mineralogical assemblages, and geochemical compositions of minerals and/or glass shards in tephra deposits using a range of analytical methods and visual and statistical approaches (e.g. Lowe et al., 2017). Correlating tephra deposits back to their volcanic source allows tephrochronological studies to provide information on the eruption frequency and geochemical evolution of volcanic regions and individual volcanoes.

text: Crossing new frontiers: extending tephrochronology as a global geoscientific research tool Tephrochronology is a unique stratigraphic tool for linking, dating, and synchronising geological, palaeoenvironmental, or archaeological sequences and events (Lowe, 2011; Alloway et al., 2013). It relies on the identification and tracing of tephra or cryptotephra horizons spatially between various depositional sequences. These horizons can provide stratigraphic event layers (tephrostratigraphy) and, when dated, isochronous age markers — since most tephra are deposited on a scale of days to weeks — that can be transferred from site to site (tephrochronology) (Lane et al., 2017b). The correlation of horizons between different sequences is reliant on matching the physical characteristics, mineralogical assemblages, and geochemical compositions of minerals and/or glass shards in tephra deposits using a range of analytical methods and visual and statistical approaches (e.g. Lowe et al., 2017). Correlating tephra deposits back to their volcanic source allows tephrochronological studies to provide information on the eruption frequency and geochemical evolution of volcanic regions and individual volcanoes.

year: 2020

title: An investigation to determine origin: age and otolith chemistry of a brown bullhead catfish (Ameiurus nebulosus) found at Okawa Bay, Lake Rotoiti

authors: Blair, Jennifer Marie

subjects: New Zealand

abstract: Some time between 10 and 15 January 2009, a brown bullhead catfish(Ameiurus nebulosus) was found washed up on the shore of Okawa Bay, Lake Rotoiti. The elemental signature of the otolith was measured using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) in order to determine the origin of the catfish. The otolith elemental signature of the Rotoiti catfish was compared to the otolith elemental signatures of catfish caught at Tokaanu Bay, Lake Taupo. Because otolith chemistry is largely determined by water chemistry, fish sharing a common origin should show similar otolith elemental signature.

text: An investigation to determine origin: age and otolith chemistry of a brown bullhead catfish (Ameiurus nebulosus) found at Okawa Bay, Lake Rotoiti Some time between 10 and 15 January 2009, a brown bullhead catfish(Ameiurus nebulosus) was found washed up on the shore of Okawa Bay, Lake Rotoiti. The elemental signature of the otolith was measured using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) in order to determine the origin of the catfish. The otolith elemental signature of the Rotoiti catfish was compared to the otolith elemental signatures of catfish caught at Tokaanu Bay, Lake Taupo. Because otolith chemistry is largely determined by water chemistry, fish sharing a common origin should show similar otolith elemental signature.

year: 2009

title: Te whakahaumanu i ngā taonga takatāpui: Belonging and thrivance for takatāpui

authors: Ngātai-Tautuku, Te Aorere

subjects: takatāpui

abstract: This thesis celebrates takatāpui belonging and thrivance; created by, with and for takatāpui. It is carefully crafted with an abundance of love for this community to which I belong. Informed by the overarching conceptual framework of Te Pū o te Rākau (pūrākau) methodology (Lee-Morgan, 2019), this thesis follows pūrākau of how takatāpui and queer Māori identify and express belonging and thrivance. The intention of this study is to privilege the voices and lived experiences of people who have been consistently subject to the systematic dehumanisation of Western research conventions.

In the aftermath of the COVID-19 pandemic in 2020, anti-Māori racism, homophobia and transphobia have risen exponentially in Aotearoa, spurring an increase in aggressive violent attacks on marginalised communities. It is progressively evident that the fundamental right to tino rangatiratanga affirmed by Te Tiriti o Waitangi to express self-determination has failed to be honoured (Came et al., 2024; Mutu, 2011a). Therefore, it is paramount within this rangahau to give power to and centralise the voices of takatāpui as they express their experiences of belonging. 

Drawing upon the springs of mātauranga takatāpui  (re)generated by takatāpui academics, this rangahau is firmly grounded within a takatāpui worldview. Adapted elements from Te Pū o te Rākau methodological framework are implemented in this rangahau to (re)affirm the importance of takatāpui voices and interdependent relationships. Experienced through the ritualistic ceremony of wānanga, informed by Kaupapa Māori tenet - titiro, whakarongo… kōrero – I facilitated a wānanga for a group of kaipūrākau to share their pūrākau at Te Kohinga Mārama marae. Throughout the wānanga the kaipūrākau shared hilarious, heartwarming and painful pūrākau about their lived experiences as Indigenous queer people navigating a settler-colonial Western society and their encounters with belonging. These precious pūrākau are then translated into key themes that communicate the findings of this rangahau, that are described as Whanaungatanga, Tuakiritanga, Mana Motuhake and Te Hari Te Koa.

text: Te whakahaumanu i ngā taonga takatāpui: Belonging and thrivance for takatāpui This thesis celebrates takatāpui belonging and thrivance; created by, with and for takatāpui. It is carefully crafted with an abundance of love for this community to which I belong. Informed by the overarching conceptual framework of Te Pū o te Rākau (pūrākau) methodology (Lee-Morgan, 2019), this thesis follows pūrākau of how takatāpui and queer Māori identify and express belonging and thrivance. The intention of this study is to privilege the voices and lived experiences of people who have been consistently subject to the systematic dehumanisation of Western research conventions.

In the aftermath of the COVID-19 pandemic in 2020, anti-Māori racism, homophobia and transphobia have risen exponentially in Aotearoa, spurring an increase in aggressive violent attacks on marginalised communities. It is progressively evident that the fundamental right to tino rangatiratanga affirmed by Te Tiriti o Waitangi to express self-determination has failed to be honoured (Came et al., 2024; Mutu, 2011a). Therefore, it is paramount within this rangahau to give power to and centralise the voices of takatāpui as they express their experiences of belonging. 

Drawing upon the springs of mātauranga takatāpui  (re)generated by takatāpui academics, this rangahau is firmly grounded within a takatāpui worldview. Adapted elements from Te Pū o te Rākau methodological framework are implemented in this rangahau to (re)affirm the importance of takatāpui voices and interdependent relationships. Experienced through the ritualistic ceremony of wānanga, informed by Kaupapa Māori tenet - titiro, whakarongo… kōrero – I facilitated a wānanga for a group of kaipūrākau to share their pūrākau at Te Kohinga Mārama marae. Throughout the wānanga the kaipūrākau shared hilarious, heartwarming and painful pūrākau about their lived experiences as Indigenous queer people navigating a settler-colonial Western society and their encounters with belonging. These precious pūrākau are then translated into key themes that communicate the findings of this rangahau, that are described as Whanaungatanga, Tuakiritanga, Mana Motuhake and Te Hari Te Koa.

year: 2025-06-19