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Map of Antarctica showing the location of the Dry Valleys (A). DNA sequenced in this study was isolated from paleomat samples collected in Victoria Valley, Wright Valley, and Taylor Valley (B). MinION calibrations were performed in the Albert P. Crary Science and Engineering Center at McMurdo Station, as well as on the peak of Hut Point Peninsula on Ross Island (C). Field sequencing runs were performed in the vicinity of Lake Fryxell in Taylor Valley (D).
