URENUI AND KIORE FORMATIONS Days 5 and 6

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