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URENUI AND KIORE FORMATIONS Days 5 and 6. Field trip stops. Day 5 & 6: Urenui and Kiore Formations. The purpose of this study is to provide a detailed documentation of the outcropping Urenui and Kiore formations and interpret influences on channel formation and fill. - PowerPoint PPT Presentation
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URENUI AND KIORE FORMATIONS
Days 5 and 6
Field trip stops
Day 5 & 6: Urenui and Kiore Formations
Modified from King et al. (1993)
The majority of Urenui Formation outcrops are bioturbated siltstone with
tubular concretions
The purpose of this study is to provide a detailed documentation of the outcropping Urenui and Kiore
formations and interpret influences on channel formation and fill.
Outcrops of the Urenui and Kiore formations
Lithofacies Map
Section modified from King et al.(1993)
Lithofacies
Lithofacies 1: Siltstone
Lithofacies 3: Conglomerate
Lithofacies 2: Sandstone
Stop 10: Gully Rock Quarry
Highly long-axis imbricated pebble extrabasinal conglomerate
Stop 12: Wai-iti
Modified from King et al. (1993)
Granule extrabasinal
conglomerate with shell hash and
tubular concretion clasts
Stop 11: Urenui Beach Camp
Modified from King et al. (1993)
Interbedded sandstone and siltstone at the top of the Mimi Channel fill
Base of Mimi Channel
Stop 8: Onaero Beach
Tubular concretions, bioturbated siltstone, and MTD.
Modified from King et al. (1993)
Stop 9: Waiau Stream
Modified from King et al. (1993)
Chaotic intrabasinal
conglomerate with pebble and granule extrabasinal clasts
and shell hash
Interbedded sandstone and siltstone in the
channel fill
Current SPODDS Students:Anne Bernhardt, Lisa Stright,
Zane Jobe, Julie Fosdick, Katie Maier, Jon Rotzien, Larisa Masalimova,Glenn Sharman, Blair Burgreen,
Acknowledgements
Field Assistants:Zane Jobe, Matt Coble,
Liz Cassel, Melanie Thompson, Anne Bernhardt
Additional AcknowledgementsMarty Grove, Gail Mahood
(Stanford)Martin Crundwell (GNS)
Adam Vonk (Univ. of Waikato; Chevron)
Stephanie Nyman (Univ. of Waikato; ExxonMobil)
Lorna Strachan (Univ. of Auckland)
Peter King, Greg Browne, and Malcolm Arnot
Steve Graham and Don Lowe
Urenui – Mount Messenger Contact
The MMF and UF have been interpreted as a continuous sequence, but a large erosional contact exists in the coastal section. This erosional contact may
correspond to the large MTD interval in the offshore seismic data.
Normal Fault— Not formation contact
Upper Mount Messenger
FaciesTruncation
Erosional Contact
Siltstone-dominated Urenui Fm