Juxtaposition of Tethyan and non-Tethyan Mesozoic radiolarian faunas in melanges, Waipapa terrane, North Island, New Zealand

Early Cretaceous Biogeographic and Oceanographic Synthesis of Leg 123 (off Northwestern Australia)

“…Similar species of Parvicingula and Ristola have been reported from New Zealand (Spörli and Aita, 1988;Spörli et al, 1989). Similar (but not identical) Parvicingula species also have been reported in the Middle Jurassic of the Blue Mountains, Oregon (Pessagno and Whalen, 1982) and in other Boreal localities of the Soviet Union (Vishnevskaya, 1988).…”

“…Both features have no parallel in known Mesozoic radiolarian assemblages and are difficult to interpret. Few Early Cretaceous southern middle-to high-latitude radiolarians are known: an Aptian/Albian fauna recently reported by Ling and Lazarus (1990) from the Weddell Sea (Hole 693B), poorly preserved faunas from New Zealand (Spörli and Aita, 1988;Spörli et al, 1989), and well-preserved radiolarian faunas from the Windalia Radiolarite (Carnarvon Basin, West Australia, Ellis, 1978;Ellis et al, 1991). None of these faunas represents an equivalent of the Neocomian sand faunas at Site 765.…”

Age/isotopic characterisation of the Waipapa Group in Northland and Auckland, New Zealand, and implications for the status of the Waipapa Terrane

“…In detail, the structure is complex; early melange formation, subsequent open folding, and imbrication are described (Brothers 1956;Spörli 1978;Bayrante & Spörli 1989;Spörli et al 1989). Along the east coast, there is a regional NNW-SSE strike (dip to the west).…”

Triassic radiolarians from the ocean‐floor sequence of the Waipapa Terrane at Arrow Rocks, Northland, New Zealand

“…Numbers indicate the lithology in which the fossils occur: 1, maroon siliceous mudstones at Arrow Rocks (this study); 2, limestone lens and bedded chert at Arrow Rocks (Takemura et al 1998(Takemura et al , 1999; 3, fusulinid limestone at Wherowhero Point (Leven & Grant-Mackie 1997); 4, radiolarian chert (Caridroit & Ferrière 1988;Adachi 1988); 5, limestone and chert at the west end of Mahinepua Peninsula (Takemura et al 1998); 6, phosphatic nodules within green siliceous mudstone at Mahinepua Peninsula (Aita & Bragin 1999). Inset: Index map of the North Island, New Zealand, showing the distribution of terranes (after Aita & Spörli 1992) and the location of the Whangaroa area (from Takemura et al 1998). greywackes (e.g., Spörli & Gregory 1981;Spörli et al 1989), with minor ocean-floor basic volcanics, limestones, radiolarian cherts, and siliceous mudstones (argillites). Kear (1971) distinguished two lithological facies-Hunua and Morrinsville-based on the presence or absence of volcanics and cherts.…”