Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Hvalroso (Walrus Island)

stripes

Occurrence number: 
063-00-002
Country: 
Greenland
Location: 
Longitude: -18.07, Latitude: 74.05

A specimen from a sill forming the small island of Hvalroso, southeast of Sabine O, has been described by Tyrrell (1932, p. 525 - referred to as Walrus Island). The rock is an olivine essexite of labradorite, augite, olivine, red-brown biotite and magnetite, with groundmass alkali feldspar, probable nepheline and abundant analcime.

Age: 
Tertiary.
References: 
TYRRELL, G.W. 1932. The petrography of some Kainozoic igneous rocks, and of the Cape Parry alkaline complex, East Greenland. Geological Magazine, 69: 520-7
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith