SUPPLEMENTAL MATERIAL

S1. 831_mosaic.jpg (Blended mosaic image of TMM 40234-17 available for download. Higher resolution version of Figure 6.)

S2. 831_marked.jpg (Blended mosaic image of TMM 40234-17 with scratches marked available for download. Higher resolution version of Figure 10.)

S3. 831_sup_3.xlsx (Spreadsheet containing scratch-angle data from TMM 40234-17 for download.)