Miocene stratigraphy of the Hokianga-Waimamaku coastline, north of Kawerau, North Auckland
- Author
- Hayward, B.W.
- Year
- 1973
- Journal / Source
- Tane
- Volume
- 17
- Pages
- 119-125
- Summary
- The lower Miocene geology of the 8 km coastal strip from Hokianga South Head to Waimamaku River mouth is described. Al l four formations recognised are included within the Waitemata Group. Shallow-water Otaua Formation sandstones, siltstones, pebbly mudstones and minor conglomerates appear conformably overlain by the deltaic, heterolithologic Omapere Conglomerate. Conformably overlying these deposits are interbedded basalt flows, breccias, and sediments of the Waipoua Basalt, which are overlain in turn by interlensing conglomerates, sandstones, siltstones and lignites of the shallow-water and terrestrial Pukorukoru Formation. The Omapere Conglomerate and Pukorukoru Formation wedge out to the south in this area, while the Waipoua Basalt flows wedge out northwards.