Initial Reports, Volume 206 Ms 206IR-101 Chapter 1, Table T9. Igneous unit and contact log, Hole 1256C. Notes: C = chilled margin, NR = not recovered, GS = gradational change in grain size. Depths calculated relative to the top of each core and based on piece lengths. Unit/Subunit Upper contact (core, section) Piece Depth (mbsf) Type Minimum thickness (m) Rock type 206-1256C- S1 4R-1 245.525 NR 0.16 Chert 1 4R-1 5 245.235 NR 3.8 Sheet flows S2 5R-1 1 252.415 NR 0.03 Chert 2 5R-3 5 255.93 NR 0.35 Sheet flows 3 6R-1 4 257.26 NR 0.29 Sheet flows 4 6R-1 7 257.55 C 0.28 Sheet flows S3 6R-1 12 257.83 NR 0.17 Sediment 5 6R-1 15 347.1 NR 1.17 Sheet flows 6 6R-2 11 259.17 C 3.44 Sheet flows 7 6R-5 2 262.61 NR 1.01 Sheet flows 8 7R-1 2 266.4 NR 0.5 Sheet flows 9 7R-1 11 266.9 C 0.76 Sheet flows 10 7R-2 1 267.66 C 0.63 Sheet flows 11a 7R-2 4 268.29 C 0.28 Sheet flows 11b 7R-2 7 268.57 C 0.1 Sheet flows 11c 7R-2 11 268.67 C 1.35 Sheet flows 11 (total) 1.73 Sheet flows 12 7R-3 6 270.02 NR 0.39 Sheet flows 13 7R-4 3 270.41 C 0.2 Sheet flows 14 7R-5 1 270.61 C 1.21 Sheet flows 15 7R-5 2 271.82 NR 2.63 Sheet flows 16 8R-2 3 277.75 C 0.97 Sheet flows 17 8R-3 9 278.72 NR 1.55 Sheet flows 18a 8R-4 3 280.27 C 0.72 Flow margin 18b 8R-5 4 280.99 GS 4.03 Massive flow 18c 9R-3 1 287.17 GS 5.8 Massive flow 18d 9R-7 1 292.97 GS 1.67 Massive flow 18e 10R-1 1 293.9 GS 3.31 Massive flow 18f 10R-3 2 297.21 GS 0.08 Massive flow 18g 10R-3 4 297.29 GS 3.46 Massive flow 18h 11R-1 1 304.04 GS 7.46 Massive flow 18i 11R-6 1f 311.83 GS 2.75 Flow margin 18 (total) 29.28 Massive flow 19 12R-1 1 312.8 NR 0.48 Sheet flows 20a 12R-1 4 313.28 C 0.13 Sheet flows 20b 12R-1 5 313.41 GS 0.25 Sheet flows 20c 12R-1 7 313.66 GS 0.38 Sheet flows 20 (total) 0.76 Sheet flows 21a 12R-1 11 314.04 C 0.58 Sheet flows 21b 12R-2 2 314.62 C 1.33 Sheet flows 21 (total) 1.91 Sheet flows 22 12R-3 3 315.95 C 1.45 Flow margin