Alkaline Rocks and Carbonatites of the World

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Seno Skyring

stripes

Occurrence number: 
034-00-003
Country: 
Chile
Region: 
Magallanes
Location: 
Longitude: -72, Latitude: -52.58

Extrusive rocks lying close to the north shore of Seno Skyring consist of labradorite, with some albite, pyroxene, altered nepheline, serpentine and magnetite in a glass base. Little detail of field relationships is available. Described as trachydolerite (shoshonite) by Quensel (1912, p. 99); chemical analyses given.

Age: 
Probably Upper Cretaceous (Quartino and Llambias, 1964, p. 4).
References: 
QUARTINO, B.J. and LLAMBIAS, E. 1964. Synopsis on rocks with alkaline affinities in the Argentine Republic. Report of the 22nd Session, International Geological Congress, 16: 1-12. QUENSEL, P.D. 1912. Geologisch-petrographische Studien in der Patagonischen Cordillera. Bulletin of the Geological Institution of the University of Upsala, 11: 1-114
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith