title: Tectonomorphic evolution of Marie Byrd Land - Implications for Cenozoic rifting activity and onset of West Antarctic glaciation

authors: Spiegel, Cornelia

subjects: Science & Technology

abstract: The West Antarctic Rift System is one of the largest continental rifts on Earth. Because it is obscured by the West Antarctic Ice Sheet, its evolution is still poorly understood. Here we present the first low-temperature thermochronology data from eastern Marie Byrd Land, an area that stretches ~ 1000 km along the rift system, in order to shed light on its development. Furthermore, we petrographically analysed glacially transported detritus deposited in the marine realm, offshore Marie Byrd Land, to augment the data available from the limited terrestrial exposures. Our data provide information about the subglacial geology, and the tectonic and morphologic history of the rift system. Dominant lithologies of coastal Marie Byrd Land are igneous rocks that intruded (presumably early Paleozoic) low-grade meta-sedimentary rocks. No evidence was found for un-metamorphosed sedimentary rocks exposed beneath the ice. According to the thermochronology data, rifting occurred in two episodes. The earlier occurred between ~ 100 and 60 Ma and led to widespread tectonic denudation and block faulting over large areas of Marie Byrd Land. The later episode started during the Early Oligocene and was confined to western Pine Island Bay area. This Oligocene tectonic activity may be linked kinematically to previously described rift structures reaching into Bellingshausen Sea and beneath Pine Island Glacier, all assumed to be of Cenozoic age. However, our data provide the first direct evidence for Cenozoic tectonic activity along the rift system outside the Ross Sea area. Furthermore, we tentatively suggest that uplift of the Marie Byrd Land dome only started at ~ 20 Ma; that is, nearly 10 Ma later than previously assumed. The Marie Byrd Land dome is the only extensive part of continental West Antarctica elevated above sea level. Since the formation of a continental ice sheet requires a significant area of emergent land, our data, although only based on few samples, imply that extensive glaciation of this part of West Antarctica may have only started since the early Miocene.

text: Tectonomorphic evolution of Marie Byrd Land - Implications for Cenozoic rifting activity and onset of West Antarctic glaciation The West Antarctic Rift System is one of the largest continental rifts on Earth. Because it is obscured by the West Antarctic Ice Sheet, its evolution is still poorly understood. Here we present the first low-temperature thermochronology data from eastern Marie Byrd Land, an area that stretches ~ 1000 km along the rift system, in order to shed light on its development. Furthermore, we petrographically analysed glacially transported detritus deposited in the marine realm, offshore Marie Byrd Land, to augment the data available from the limited terrestrial exposures. Our data provide information about the subglacial geology, and the tectonic and morphologic history of the rift system. Dominant lithologies of coastal Marie Byrd Land are igneous rocks that intruded (presumably early Paleozoic) low-grade meta-sedimentary rocks. No evidence was found for un-metamorphosed sedimentary rocks exposed beneath the ice. According to the thermochronology data, rifting occurred in two episodes. The earlier occurred between ~ 100 and 60 Ma and led to widespread tectonic denudation and block faulting over large areas of Marie Byrd Land. The later episode started during the Early Oligocene and was confined to western Pine Island Bay area. This Oligocene tectonic activity may be linked kinematically to previously described rift structures reaching into Bellingshausen Sea and beneath Pine Island Glacier, all assumed to be of Cenozoic age. However, our data provide the first direct evidence for Cenozoic tectonic activity along the rift system outside the Ross Sea area. Furthermore, we tentatively suggest that uplift of the Marie Byrd Land dome only started at ~ 20 Ma; that is, nearly 10 Ma later than previously assumed. The Marie Byrd Land dome is the only extensive part of continental West Antarctica elevated above sea level. Since the formation of a continental ice sheet requires a significant area of emergent land, our data, although only based on few samples, imply that extensive glaciation of this part of West Antarctica may have only started since the early Miocene.

year: 2016

title: From sit-forward to lean-back: Using a mobile device to vary interactive pace

authors: Jones, Mark Hedley

subjects: computer science

abstract: Although online, handheld, mobile computers offer new possibilities in searching and retrieving information on the go, the fast-paced, "sit-forward" style of interaction may not be appropriate for all user search needs. In this paper, we explore how a handheld computer can be used to enable interactive search experiences that vary in pace from fast and immediate through to reflective and delayed. We describe a system that asynchronously combines an offline handheld computer and an online desktop Personal Computer, and discuss some results of an initial user evaluation.

text: From sit-forward to lean-back: Using a mobile device to vary interactive pace Although online, handheld, mobile computers offer new possibilities in searching and retrieving information on the go, the fast-paced, "sit-forward" style of interaction may not be appropriate for all user search needs. In this paper, we explore how a handheld computer can be used to enable interactive search experiences that vary in pace from fast and immediate through to reflective and delayed. We describe a system that asynchronously combines an offline handheld computer and an online desktop Personal Computer, and discuss some results of an initial user evaluation.

year: 2003-03

title: Decolonising Midwifery Education in Aotearoa: A Case Study Approach

authors: Cleaver,  Deanne Lesley

subjects: Decolonisation

abstract: The bicultural nature of Aotearoa (New Zealand) creates a strong foundation for the unique environment that supports the weaving of indigenous knowledge throughout midwifery education, and in turn creating a platform for decolonisation. Te Tiriti o Waitangi/ The Treaty of Waitangi serves to inform the direction that midwifery education and midwifery practice must take by underpinning these frameworks.
The revised midwifery curriculum and reaccreditation that supported the immersion of Indigenous knowledge throughout the midwifery degree at Wintec is currently in its fifth year. It was identified that there needed to be a more explicit focus of cultural safety and responsiveness, therefore in support of this Mātauranga Māori (Māori knowledge) was carefully embedded and linked to learning outcomes. This is in direct support of Te Tiriti o Waitangi and a move towards a Te Tiriti honouring programme. Topics that relate to tikanga Māori (customs), Te Ao Māori (Māori worldview) and Te Reo Māori (language) are respectfully taught, providing opportunities for understanding and growing competencies for midwifery tauira.  
Understanding colonisation in its global context alongside its role in the history of Aotearoa supported by Te Tiriti o Waitangi knowledge, is vital in the process of decolonisation. Tauira are encouraged to explore and reflect on these factors throughout their degree, supporting their growing cultural safety and awareness of relationships.  An anti-racism workshop in the final year of the degree adds another layer to the work of decolonisation and equips tauira with tools to be active in their allyship.
This personal and curricula journey empowers tauira to become culturally safe and responsive midwives, positively impacting the health of whānau Māori.
Through a case study approach the effectiveness of the interweaving of indigenous knowledge, Te Tiriti o Waitangi and Anti-Racism praxis will be explored, with the purpose of unpacking the learnings as a tool for social transformation within the process of decolonisation.
These changes promote the professional development of educators and the empowerment of tauira to uphold Indigenous rights, while providing care in partnership that is respectful. Decolonising Midwifery Education in Aotearoa: A Case Study approach’ will be explored and unpacked.

text: Decolonising Midwifery Education in Aotearoa: A Case Study Approach The bicultural nature of Aotearoa (New Zealand) creates a strong foundation for the unique environment that supports the weaving of indigenous knowledge throughout midwifery education, and in turn creating a platform for decolonisation. Te Tiriti o Waitangi/ The Treaty of Waitangi serves to inform the direction that midwifery education and midwifery practice must take by underpinning these frameworks.
The revised midwifery curriculum and reaccreditation that supported the immersion of Indigenous knowledge throughout the midwifery degree at Wintec is currently in its fifth year. It was identified that there needed to be a more explicit focus of cultural safety and responsiveness, therefore in support of this Mātauranga Māori (Māori knowledge) was carefully embedded and linked to learning outcomes. This is in direct support of Te Tiriti o Waitangi and a move towards a Te Tiriti honouring programme. Topics that relate to tikanga Māori (customs), Te Ao Māori (Māori worldview) and Te Reo Māori (language) are respectfully taught, providing opportunities for understanding and growing competencies for midwifery tauira.  
Understanding colonisation in its global context alongside its role in the history of Aotearoa supported by Te Tiriti o Waitangi knowledge, is vital in the process of decolonisation. Tauira are encouraged to explore and reflect on these factors throughout their degree, supporting their growing cultural safety and awareness of relationships.  An anti-racism workshop in the final year of the degree adds another layer to the work of decolonisation and equips tauira with tools to be active in their allyship.
This personal and curricula journey empowers tauira to become culturally safe and responsive midwives, positively impacting the health of whānau Māori.
Through a case study approach the effectiveness of the interweaving of indigenous knowledge, Te Tiriti o Waitangi and Anti-Racism praxis will be explored, with the purpose of unpacking the learnings as a tool for social transformation within the process of decolonisation.
These changes promote the professional development of educators and the empowerment of tauira to uphold Indigenous rights, while providing care in partnership that is respectful. Decolonising Midwifery Education in Aotearoa: A Case Study approach’ will be explored and unpacked.

year: 2023