Abstract
Abstract Petrographic investigation of rocks from Mason Bay reef indicates that it consists of gabbro and amphibolite similar to, but less evolved than, the Walkers Hill diorite of western Stewart Island. Petrographic examination of samples from Mid Bay reef in Te Waewae Bay, and seismic profiling across it, reveal that this reef is predominantly gabbro with some granite, and is raised up, together with probably Pliocene sediments, along a northeasterly oriented structure. This exposure of basement plutonic rocks at Mid Bay reef indicates total uplift of more than 5000 m in the late Tertiary, effectively separating the Waiau Basin to the north from the Solander Basin to the south.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
