Transactions of the Royal Society of New Zealand Volume 83 [electronic resource]

Volume 83, 1955-56

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Series	Formation or Zone	Lithology and Thickness	Important Fossils	Age
Arnold & Landon	Weka Pass and Amuri limestones	Sandy limestone glauconitic at base. Fine grained limestone, flinty at base. c 2,500 feet.	Numerous foraminifera	Oligocene.	Tertiary

Danne Virke	Flint beds	Flint beds, calcareous at top, sulphurous and carbonaceous at base 1000 to 2000 feet.	No fossils found.	Eocene
				Paleocene
Mata	Whangai shale	Flinty sulphurous siltstone, dark when fresh rusty weathering. 500 to 1000 feet.	Rzehakina epigona.	Danian	Upper Cretaceous
				Maestrichtian.
	Australis zone (solid black on map)	Thick bedded medium sandstone slightly carbonaceous 0 to 500 feet.	Inoceramus cf. pacificus 1*	Campanion	Senonian
			Inoceramus australis 2
Raukumara=R	A zone	Dark micaceous sulphurous siltstone, sandstone bands. 0 to 1000? feet	Inoceramus sp. A 3
	B. zone	Siltstone and medium sandstone. 0 to 200 feet.	Inoceramus sp. B 4	Santonian
	Bicorrugatus zone	Medium to coarse sandstone, glauconitic 0 to 400 feet.	Inoceramus bicorrugatus Belemnites. sp. A 5	Coniacian
Clarence =C	Porrectus zone	Medium blue-grey mudstone with concretionary bands c 1000 feet.	Inoceramus porrectus Gaudryceras subsacya Porapuzosia off. haughtoni Belemnites sp. B 6 Aucellina euglypha	Turonian

	Barren zone	Medium blue-grey mudstone with concretionary bands c. 1000 feet	Inoceramus frags. only	Cenomanian
	Concentricus zone	Medium blue-grey mudstone, concretionary bands, plant fragments c. 1000 feet	Turrilites circumtaeniatus Belemnites sp. C Inoceramus concentricus7	Albian	Lower Cretaceous
	Anglicus? zone	Dark mudstone	Inoceramus cf. anglicus 8
Taitai? = T?	Wharfe Gorge Sandstone	Graded bedded sandstone	Belemnites sp. D	Aptian?
	C. zone	Dark mudstone	Inoceramus sp. C 9
	Basal conglomerate'	Conglomerate and mudstone bands Conglomerate with well rounded pebbles of greywocke, red chert, quartz, and igneous rocks. c. 50 feet.	No fossils found
	Pre-Clarence	Strongly compacted dark muddy sandstone and sandy siltstone. Many conglomerate bands. c. 5000 feet.	No fossils found near Coverham.	Neocomian or Jurassic.	?

Fig. 5 (above).—Stratigraphic Column to accompany geological map of Coverham district showing lithology and important fossils. Numbers show distribution of zone fossils on map opposite.

Fig. 6 (on right).—Geological map of Coverham district on about the same scale as the air mosaic Fig. 1. Thomson's formations are shown on left in sloping capitals. Numbers 1 to 8 show distribution of zone fossils as indicated in Fig. 5.

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