Other formats

    Adobe Portable Document Format file (facsimile images)   TEI XML file   ePub eBook file  

Connect

    mail icontwitter iconBlogspot iconrss icon

Report on the Sixth and Seventh Victoria University of Wellington Antarctic Expedition 1962-63: VUWAE 6 & 7

(b) Granitic Rocks

(b) Granitic Rocks.

Granitic rocks constitute almost all of the basement. Several distinct granite types were recognized. In some cases they were able to be mapped separately over fairly extensive areas but elsewhere they were interbedded or irregularly emplaced with respect to one another. They range in appearance from coarse grained porphyritic, with strong foliation, to uniformly fine grained varieties, and from leucocratic to melanocratic in composition. It was found that the fine grained leucocratic granite was younger than the coarser grained melanocratic granite. Samples were collected for radioactive age determinations by potassium-argon and Rubidium/strontium methods.