Examples of microscopic images examining BSi contents with a 40x magnification using an Olympus CH light microscope.

• Main Authors: Malin E. Kylander (807890), Mikaela Holm (10318543), Jennifer Fitchett (10318546), Stefan Grab (10318549), Antonio Martinez Cortizas (3332232), Elin Norström (10318552), Richard Bindler (2057503)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Physiology; Evolutionary Biology; Ecology; Environmental Sciences not elsewhere classified; Astronomical and Space Sciences not elsewhere classified; Biological Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; season precipitation; BP; Africa Southern Africa; Antarctic Cold Reversal; centennial timescales; precipitation zones; slope basin; yr; data support; spectroscopy attenuated; Glacial period; Quaternary paleoclimatic change; drier period; drier conditions; region; winter precipitation; ACR; Sekhokong Range; δ 13 C; nuanced picture; 80 years; paleoclimatic variability; paleoenvironmental evolution; sample; Drakensberg; FTIR-ATR; reliably-dated records; Antarctic; Olympus; Antarc*
• Online Access: https://doi.org/10.1371/journal.pone.0246821.s002

The selected images represent the general content of the samples. Image A and B present samples from 13,640 and 13,870 cal yr BP, respectively, which are characterized by low diatom content and high abundance of long elongated phytoliths. Image C and D present samples from 15,170 and 16,430 cal yr BP, respectively, and have high diatom content. (TIF)