Otto Pettersonfjellet is a mountain in Nathorst Land at Spitsbergen, Svalbard.
It extends over a length of about seven kilometers, and its highest peak is 1,076 m.a.s.l.
It is named after Swedish oceanographer Sven Otto Petterson.
[1] The glacier of Storvolbreen is between Otto Pettersonfjellet and Storvola,[2] and Tarmbreen separates Otto Pettersonfjellet from Gloføykja.
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