o.— 9.

1909. NEW ZEALAND.

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

Presented to both Houses of the General Assembly by Command of His Excellency

CONTENTS.

Page Letter of transmittal . . . . . . . . 2 Introduction .. . . ■ ■ . • .. 2 Summary of operations . . .. .. .. 2 Publications .. .. .. ■ . .. 2 Field and office work of the Director . . . . 3 Investigations at Tiraumea .. . . ■ • 3 Work in Whangaroa Subdivision . . . . 3 Reconnaissance of North Cape Peninsula .. 5 •Introduction .. ■ ■ • ■ .. 5 General geology . . . . •. .. 5 Economic geology .. ■ . . . . . 5 (1.) Quartz veins .. .. .. '. 5 (2.) Copper-ore .. .. ■• ..5 (3.) Iron-ore .. . . . . . . 5 (4.) Coal and peat . . .. . . 6 (5.) Glass-sand .. .. •• ..6 Work in tho Dun Mountain Subdivision.. . . 6 General geology . . .. ... .. 6 Economic geology . . . . . ... 6 (1.) Gold .. •• •• •• 6 (2.) Copper .. •. •. . . 7 (3.) Chromite .. . . .. .. 9 (4.) Coal .. .. .. .-9 (5.) Cement-materials and building-stone .. 9 The Pakawau Coalfield .. • • .. 9 Work at the Franz Josef Glacier .. 10 Coal-bearing strata in the Wai-iti and Wangapeka valleys .. .. .. •• ..11 Reports of field officers Mr. P. G. Morgan, General Geologist .. .. 11 Office-work Field-work in the Greymouth Subdivision .. 11 I. Physiography .. ■ ■ .. 12 11. General geology .. •. .. 12 Greenland Series .. .. .. 12 Coal-measures .. .. .. 12 Miocene beds .. • • .. 13 Pliocene, Pleistoceno, and Recent .. 14 111. Economic geology .. .. .. 14 (1.) Alluvial gold .. .. ..14 (2.) Auriferous quartz veins .. 15 (3.) Antimony .. .. .. 15 I (4.) Coal .. .. .. .. 15 (5.) Petroleum .. .. .. 15 (6.) Building-stone, and materials for lime, cement, brick, &c. .. 16 IV. Miscellaneous economic resources .. 17 Mr. Colin Fraser, Mining Geologist .. .. 17 Field-work in the Thames Subdivision, Hauraki 17 Extent and position of the area .. 17 Nature of work carried out .. . • 17 General geology .. .. • • p .. 17 General classification of rock formations .. 17 (1.) Pre-Jurassic and Jurassic stratified rocks .. .. • • 17 (2.) Tertiary volcanic rocks of the " First Period " .. • • .. 17 (3.) Tertiary volcanic rocks of the " Second Period" .. •• ..17 (4.) Tertiary volcanic rocks of the " Third Period " . ■ • • .. 18 (5.) Intrusive rocks of various periods .. 18 .(IS.) Unconsolidated and loosely consolidated debris .. .. ..18

I—C. 9.

l'age Reports of field officers— continued. 18 Mr. Colin Frasor, Mining Geologist— continued. 18 General geology— continued. 18 Economic geology .. .. 18 (1.) Gold-silver quartz veins .. .. 18 Waiomo Valley and adjacent country 18 Te Puru Valley and adjacent country 19 Tararu .. .. .. 19 The Kauaeranga Valley .. 19 Kirikiri-Wharehoe-Matatoki Area . . 20 Puriri Area .. .. 20 Thames Special Area .. 20 (2.) Metalliferous deposits other than goldsilver .. .. .. 21 (3.) Stone for building and roadmaking .. 21 (4.) Water-power .. .. ..21 Mr. E. J. H. Webb, Assistant Geologist .. 21 Work in the Mount Radiant Subdivision . . 21 General geology .. . . .. .. 21 General classification . . .. 21 (1.) Aorere Series .. .. ..21 (2.) Oamaru Series .. .. ..22 (3.) Beach and river d'bris, talus slopes .. 22 (4.) Igneous rocks .. .. ..22 Economic geology .. .. . . 22 (1.) Copper and molybdenum .. ..22 (2.) Lead and zinc .. .. ..22 (3.) Alluvial gold .. .. ..23 (4.) Coal .. .. .. ..23 (5.) Materials for lime and cement .. 23 (6.) Petroleum . . .. .. .. 23 Mr. J. H. Adams, Assistant Geologist .. .. 23 Work in the Whatatutu Subdivision .. 23 General geology .. .. .. .. 23 (a.) Whatatutu Series .. .. .. 23 (1.) Clay-shale, chalky limestone, glauconitic sandstone .. 24 (2.) Claystone and argillaceous sandstone, with calcareous concretions .. 24 (3.) Claystone and argillaceous sandstone, limestone, conglomerate, fossiliferI ous argillaceous sandstone, coarse sandstone .. .. .. 24 Structure of the series .. 25 (6.) Waipaoa beds .. .. ..25 (c.) River and terrace gravels .. .. 25 Economic geology .. .. 25 Petroleum .. .. ... 25 Gold .. .. .. ■• -.26 Coal 26 Material for macadamising roads .. 26 Brickmaking .. .. .. .. 26 Cement .. • • .. 27 Suitable sites for deep boring ... .. 27 Mr. K. M. Graham, Topographer .. .. 27 Field-work in the Waihi Subdivision .. .. 27 Mr. H. Richardson, temporary Assistant Topographer .. .. .. ■ ■ 27 Coal-seams in tho Turimawiwi-Anaweka district 28 MAP. Sketch-map of Kotuku Oilfield.