The Late Mesozoic fragmentation of the New Zealand segment of Gondwana in Gondwana Five. Selected papers and abstracts of papers.

Auteurs :
LAIRD, M. G.
CRESSWELL, M. M.
VELLA, P.

Description :
Following compression, uplift and erosion of the rocks of the Rangitata Orogen (Carboniferous-Lower Cretaceous) a change to extensional tectonics occured in mid-Cretaceous times throughout the New Zealand region. A rift system developed on the West Coast of the South Island, while a tectonically-controlled basin developed on the east coast of both islands. This early extensional phase was accompanied by volcanism ranging from rhyolitic to basaltic. The Late Cretaceous transgression and pene-contemporaneous extrusion of alkali basalts over much of the New Zealand area and renewed onset of rifting on the West Coast were related to the opening of the Tasman sea and the beginning of separation form Antarctica.


Type de document :
Congrès

Source :
International Gondwana symposium. 5th, 1980, p. 311-318, Références bibliographiques : 30 réf.

Date :
1981

Identifiants :
isbn : 90-6191-088-9

Editeur :
Pays édition : Inconnu