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Koettlitz and Skelton Groups

Ice-Free Valleys, Koettlitz Glacier, Southern Victoria Land [Pg.78]

Blue glaciers is partially ice-free and exposes metasedimentary and metavolcanic rocks of the Koettlitz Group (Adapted from Bull 1962) [Pg.78]

The Anthill Formation is about 3,300 m thick (Stump 1995, p. 99) and consists of well-bedded white to grey limestone interbedded with lesser amounts of mudstone, sUtstone, and quartzite. The limestone appears to be unfossiliferous. The metamorphic grade of the AnthiU Formation increases from the greenschist facies on the south side of the Skelton Glacier to the amphibolite facies farther north between the Skelton and the Koettlitz glaciers. [Pg.78]

The Cocks Formation contains a porphyritic pillow lava that was dated by RoweU et al. (1993) by means of the samarium-neodymium (Sm-Nd) method (Appendix 3.6.6). The rock yielded a Sm-Nd model date of700-800 Ma, which indicates that the flow was extruded during the Neoproterozoic Era The metamorphic grade of the Cocks Formation also increases in a northerly direction. [Pg.78]

Salmon Marble Garwood Lake Formation Miers Marble [Pg.78]


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