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, Geologic map of the Fuegian thrust-fold belt with main structural features 1262 and stratigraphic units mentioned in the text. See location in Fig. 1a, and text for 1263 details of stratigraphic units, Compiled from Klepeis, vol.3, p.1264, 1994.

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, Cross-sections x-y and y-z indicate location of Fig. 12a. Pt: Parry thrust

U. Martial and . Pluton, UPA: Ushuaia Peninsula Andesites, JP: Jeu-Jepén pluton, 1268 MP: Moat pluton, BP: Bahía Pía, BT: Bahía Thetis

, Figure 4: Time constraints for the deformations recorded in the Fuegian thrust-fold 1271

, Modified from Torres Carbonell 1272 and Dimieri, 2013.

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, Notice the lack of intense deformation in pictures a 1283 (person for scale) and b, from the main body of the intrusion, Outcrop photographs of the Ushuaia Peninsula Andesites (UPA) and host 1282 rock (Yahgan Formation, YG), vol.5

, Formation shows slight folding and cleavage away from the main body of the intrusion 1285 (scale is 6 cm long)

, Photomicrographs of cleavage in the dike of picture d, plane-polarized light. Note 1288 horizontal pressure-solution seams with wriggly morphology defined by opaque 1289 insoluble residue, Pl: plagioclase, Hbl: hornblende (chloritized)

, Beauvoir Formation) with scarce pressure-solution 1291 seams (from upper-right to lower-left) reflecting the prior cleavage, which is 1292 obliterated by recrystallization of the plagioclase + quartz (Qz) groundmass, 1293 dissemination of insoluble residue inherited from the pressure-solution seams, and 1294 growth of biotite, Hornfels from the Jeu-Jepén pluton

, Brittle-1298 ductile shear zones (BDZS) are numbered for reference to picture b. Location of 1299 photographs c-j is shown. b. Panoramic photograph with depiction of major structures 1300 as shown in a. Acronyms are for stratigraphic units in the map. c-d. Outcrop (backpack 1301 for scale) and close-up view of cataclastic fabrics in thrust zones. e. S-C type fabric 1302 showing top-to-north component of movement. f. Cataclasite block revealing faulted 1303 folds (horizontal trace) affecting an older transposition foliation (alternating lighter 1304 and darker bands). Encircled 23-mm coin for scale. g. Photomicrograph of a cataclasite 1305 from a thrust zone affecting older quartz-mica schist, cross-polarized light

, Crenulation of a previous foliation in the upper flat of the BDSZ 1. Scale is 6 cm long

S. , type fabric showing northeastward component of displacement in the detachment 1310 zone. k. Cross-section

, Panoramic photograph of the structure at Arroyo Velazquito. The 1314 detachment near the base of the Beauvoir Formation is folded by a large antiform

, b-d. Details of brittle-ductile fault fabrics in the 1317 detachment zone (located in a), superposed on older foliations and folds. In b, s-c type 1318 fabrics show a component of northward displacement (notice that north points to the 1319 lower left). 6-cm scale highlighted, Towards the north, the beds dip northwards with progressively shallower angles 1316 (values given in dip direction/dip)

, Schematic description and examples of D1 CB structures (a) and D2 CB -D1 FB 1323 structures (b), further explained in section 6. S0: bedding, J: Jurassic and older, vol.8, p.1324

, Ku: Upper Cretaceous. Cross-sections are idealized and not to scale, Lower Cretaceous, p.1325