C—9

1908. NEW ZEALAND.

NEW ZEALAND GEOLOGICAL SURVEY DEPARTMENT (SECOND ANNUAL REPORT (NEW SERIES) OF THE).

Presented to both Houses of the General Assembly by Com maud of His Eacetlency.

CONTENTS. p ag e Page Letter of transmittal .. .. .. ..II Reports of field officers, <fco.— continued. Introduoti >n .. .. .. .. .. 1 Mr. Colin Fraser, Mining Geologist .. .. 18 Staff .. .. .. .. . • .. 1 Field-work in the Coromandel Subdivision, Summary of operations .. .. .. .. 2 Hauraki .. .. .. .. .. 18 Publications .. .. .. .. .. 2 Fieldwork in the Thames Subdivision, Hauraki 18 Library .. .. .. .. .. 2 1 Ex ent and position of the area .. .. 18 Field and offioe work of Direotor .. .. .. 2 Nature of the work carried out .. ..18 Reconnaissance of the Landsborough and Kara- Physiographic notes .. .. .. 18 ngarua Valleys .. .. .. .. 3 General geology .. .. .. .. 19 Narrative .. .. .. .. .. 8 General classification of rock-formations .. 19 General geology .. .. .. .. 4 (1.) Pre-Jurassic and Jurassic stratified rocks 19 Physiography .. .. .. ..4 (2.) Tertiary volcanic rooks of the "First Reoonnaissanoe of Mount Radiant copperfield .. 7 Period" .. .. .. .. 19 Karamea to Parapara .. .. .. 7| (3.) Tertiary volcanic rocks of the "Second Inauguration of Whangaroa work .. .. 7 Period" (Beeson's Inland group) .. 19 Reconnaissance in the Heaphy Subdivision .. 7 (4.) Tertiary volcanic rooka of the " Third Physiography .. .. .. .. 8 Period" .. .. .. .. 19 General geology .. .. .. .. 9 (5.) Intrusive rocks of various periods .. 19 The Urewera country .. .. .. ..9 (6.) Loosely consilidated and unconsolidated Narrative .. .. .. .. ..9 debris .. .. .. ..20 Physiography .. .. .. .. 10 Eoonomic geology .. .. .. .. 20 General geology .. .. .. 10 (1.) Gold silver quartz voins .. 20 Detailed work in Poverty Bay oilfields .. .. 10 Manaia .. .. .. .. 20 Thames Subdivision .. .. .. ..11 Waikawau .. .. .. ..20 Tairua Goldfield .. .. .. ..11 Te Mata .. .. . ..20 Physical geography .. .. .. .. 11 Tapu .. .. .. .. .. 21 General geology .. .. .. 11 Areas southward of Tapu Stream .. 21 The principal mines.. .. .. ..12 Eastern side of the Main Range .. ..21 Tairua Broken Hills .. .. ..12 Special area within the Thames Borough .. 21 Tairua Golden Hills .. .. .. 12 (2.) Coal .. .. .. .. 21 The Golien Belt Mine ..12 Stream gauging and water-power .. ..21 The Champion Mine .. .. ..13 Conclusion.. .. .. .. ..22 Work in the Town of Thames .. .. .. 13 Mr. Edward Clarke, Assistant Geologist .. 22 Reports of field officers and senior draughtsman— Work in the Whangaroa Subdivision .. ..22 Mr. P. G. Morgan, General Geologist .. .. 13 Introduction .. .. .22 Narrative of field work in the Mikonui Sub Physiographic notes .. ..22 division .. .. .. .. 13 General geology .. .. .. .. 22 Area of country examined .. .. .. 15 General classification .. .. .. 22 Physiography .. .. ..15 (1.) The Kiriwha Series .. ..22 General geology .. .. .. .. 16 (2.) The Waipapa Series .. .. 23 Classification of rock-formations .. 16 (3.) The Kaeo Series .. .. 23 Distribution .. .. .. ..16 (4.) Tertiary volcanics .. .. ..23 Structure and other features .. ..16 (5) Post-Tertiary rocks .. ..23 Eoonomic geology .. .. .. 16 Economic geology .. .. .. 23 (1.) Metalliferous veins of the Arahura and (1.) Copper-ore .. .. .. .. 23 Greenland Series .. .. 16 (2.) Manganese-ore .. .. .. 23 (2.) Asbest s and talo .. .. .. 17 (3.) Iron-ore .. .. .. .. 23 (3.) Building and ornamental stones, clays, (4.) Petroleum shales .. .. 24 &c. .. .. .. .. 17 (5.) Gold .. .. ..24 (4.) Alluvial gold .. .. .. .. 17 Mr. E. J. H. Webb, Assistant Goologist .. .. 24 Water-power, river-gauging, &o. .. 17 System of work .. .. .. .. 24 Office-work .. .. .. 17 Work in the Heaphy Subdivision .. .. 24 i—C. 9.