Fig. 2
From: Glacier ice archives nearly 15,000-year-old microbes and phages
Sampling sites of glacier ice and an overview of experimental design. a Location of the Guliya ice cap; b drilling sites of the S3 and PS ice cores in Guliya ice cap; c sampling depths of eight ice samples used to investigate the microbial and viral communities; and d an overview of experimental design for microbial and viral investigations of collected ice samples. S3 and PS cores were drilled from the summit and plateau of Guliya ice cap, respectively (b). The drill date and length of the two ice cores and the approximate age of each sample are indicated (c). The sample names are coded by depth, e.g., for D13.3 is from 13.3 m below the glacier surface. All samples were subjected to microbial investigations, and two samples D25 and D49 (light blue) were selected for viral investigation