 | | Report (issue) | | volcanoes.and. Geothermal areas of Rotorua The Geological Society of New Zealand gratefully acknowledges...guidebook. Published by the Geological Society of New Zealand www.gsnz.org.nz 2002 ISBN 0-908678-92-4 ©...Levin Front Cover: Roto a Tamaheke is part of the Ororea group of hot Springs at Whakarewarewa thermal reserve...Title Page: Hot springs bubble up along the course of the stream that flows down Waimangu Valley. Back...water creates intricate patterns on the surface of the mud pool on Loop Road, Waiotapu. Geyserland |  | | Report (issue) | | Geological Society ?f New Zeala_nd watefully acknowledges the financial assistance of the following companies...companies in the publication of this guidebook. Mobil Oil New Zealand Limited (Mobil Environmental Grant)...Reynolds, Thom and Allardice Ltd BP New Zealand Ltd NZ Steel Ltd ICI New Zealand Limited McCallum Bras Ltd Contents...Formation of Rotorua Basin Later history of Rotorua Basin Geothermal systems Geothermal deposits Rotorua Geothermal...Wairakei Waiotapu Waimangu Day two - around Lake Rotorua Whakarewarewa Day three - Mt Tarawera page 2 6 |  | | Journal (article/letter/editorial) | | HydrothermalEruptionsin the WaiotapuGeothermalSystem,New Zealand:Their Origin, AssociatedBreccias,and Relation...hydrothermaleruption brecciasin the activeWaiotapugeothermalsystem,New Zealand.Thesesurficialdepositsare characterized by...andangularity;a poorlysorted,matrix-supportedtexture;anabsence of primaryvolcanicmaterial;anda variabledegreeof hydrothermal...f 200 to 300 m/s.Previously publisheddiscussions of the originof thesetypesof eruption,or equivalentbrecciasin...fluidoverpressuresin the upper silicifiedportion of a hydrothermalsystem.In this paper an alternative |
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