M.B. Underwood, K.D. Hoke Ms 168-012 Chapter 5, Table 6. Relative abundances of clay minerals, <2-mu m size fraction, Cascadia Basin. Footnote: * T = turbidite matrix, H = hemipelagic mud Relative abundance clay mineral Core, section, Depth Strati- Lithology* Chlorite + interval (cm) (mbsf) graphic Smectite Illite Kaolinite unit (%) (%) (%) 168-1023A- 1H-6, 54-61 8.04 IA T 22 43 36 1H-6, 78-84 8.28 IA M 16 35 49 3H-3, 108-112 22.90 IA M 3 49 48 3H-3, 125-129 23.07 IA T 3 42 55 4H-3, 21-23 31.51 IA T 2 54 44 4H-3, 26-28 31.56 IA M 2 55 43 5H-1, 50-55 38.30 IA T 1 59 41 5H-1, 59-64 38.39 IA M 9 48 42 9H-1, 60-65 76.40 IA T 13 34 52 9H-1, 72-77 76.52 IA M 13 37 50 10H-1, 75-80 86.05 IA M 2 31 67 11H-2, 52-57 96.82 IA T 5 41 54 11H-2, 63-68 96.93 IA M 8 32 59 12H-3, 54-59 107.84 IA M 5 39 56 14H-3, 49-54 126.79 IA T 13 26 61 14H-3, 56-62 126.86 IA M 20 30 50 16X-2, 69-71 134.89 IA T 8 38 54 16X-2, 76-78 134.96 IA M 3 39 58 18X-1, 53-57 152.43 IA M 2 56 43 19X-1, 12-17 161.72 IA T 2 43 55 19X-1, 20-25 161.80 IB M 8 45 47 20X-5, 137-142 178.57 IB M 2 37 61 20X-5, 146-150 178.66 IB M 3 50 47 21X-4, 45-47 185.75 IB M 6 44 50 21X-7, 34-39 190.14 IB M 16 36 48 22X-1, 45-47 190.85 II M 2 38 59 22X-1, 88-93 191.28 II M 3 43 54 22X-2, 47-62 191.90 II M 3 35 62 22X-3, 17-19 192.22 II M 5 44 50 Average for Site 1023 7 42 52 Standard deviation 6 8 7 Maximum 22 59 67 Minimum 1 26 36 168-1024B- 1H-5, 46-48 6.46 IA T 13 33 54 1H-5, 77-79 6.77 IA M 18 32 50 4H-6, 47-52 34.57 IA T 17 45 38 4H-6, 56-61 34.66 IA M 11 46 43 8H-4, 26-31 69.36 IA T 20 34 45 8H-4, 46-51 69.56 IA M 17 33 50 11H-2, 78-83 95.38 IA T 31 29 40 11H-2, 87-93 95.47 IA M 23 32 45 13H-5, 46-48 118.56 IA M 1 45 54 14X-6, 133-138 130.43 IA T 6 47 47 14X-6, 141-146 130.51 IB M 2 48 50 15X-6, 55-57 139.25 IB M 6 34 61 16X-6, 35-38 148.65 IB M 2 36 62 17X-1, 87-89 151.27 II M 2 36 62 17X-5, 51-53 156.91 II M 10 35 56 18X-5, 63-65 166.63 II M 5 50 45 Average for Site 1024 11 38 50 Standard deviation 9 7 7 Maximum 31 50 62 Minimum 1 29 38 168-1025A- 1H-4, 28-34 4.78 IA M 15 37 48 1H-4, 35-48 4.85 IA T 13 40 47 168-1025B- 1H-3, 88-93 3.88 IA M 22 46 32 1H-3, 95-101 3.95 IA T 6 47 48 2H-5, 77-83 11.77 IA T 4 40 56 2H-5, 113-118 12.13 IA M 9 43 49 3H-1, 76-81 15.26 IA T 3 51 45 3H-1, 90-95 15.40 IA M 0 41 58 4H-5, 97-102 30.97 IA T 13 47 41 4H-5, 105-110 31.05 IA M 15 51 34 6H-1, 51-56 43.51 IA T 15 40 45 6H-1, 59-64 43.59 IA M 19 42 39 7H-4, 121-126 58.21 IA T 5 30 65 7H-4, 128-133 58.28 IA M 6 37 57 8H-4, 111-115 67.61 IA T 31 26 43 8H-4, 117-122 67.67 IA M 18 31 51 10X-1, 98-100 82.08 IB M 5 25 70 10X-3, 103-105 85.13 IB M 4 46 50 10X-5, 140-150 88.50 II M 2 41 56 11X-2, 135-150 93.55 II M 2 46 51 11X-4, 52-54 95.72 II M 1 34 65 Average for Site 1025 10 40 50 Standard deviation 8 8 10 Maximum 31 51 70 Minimum 0 25 32 168-1026A- 1H-3, 134-139 4.34 IA M 5 57 38 1H-4, 61-66 5.11 IA T 16 44 40 2H-2, 96-102 7.86 IA T 3 45 52 2H-2, 105-110 7.95 IA M 7 37 56 2H-4, 103-109 10.93 IA T 1 37 62 2H-4, 111-116 11.01 IA M 13 40 47 5H-3, 53-58 37.43 IA T 9 48 43 5H-3, 65-70 37.55 IA M 7 40 52 6H-6, 8-13 50.98 IA T 3 43 54 6H-6, 24-30 51.14 IA M 2 41 58 7H-3, 92-98 56.82 IA T 4 47 48 7H-3, 109-114 56.99 IA M 6 42 53 10H-3, 80-84 85.20 IA T 2 50 48 168-1026C 2R-CC, 7-9 94.27 IA M 1 52 46 4R-1, 113-128 114.63 IA M 16 32 53 5R-1, 135-150 124.45 IA M 11 41 47 8R-1, 63-78 152.63 IA M 12 40 48 10R-2, 135-150 174.05 IB M 13 33 54 12R-2, 90-92 192.90 IB M 2 35 63 14R-4, 130-150 205.90 IB M 2 53 45 15R-1, 81-104 220.11 II M 25 38 38 15R-4, 130-150 225.10 II M 8 41 51 15R-7, 25-45 228.55 II M 0 40 60 Average for Site 1026 7 43 50 Standard deviation 6 7 7 Maximum 25 57 63 Minimum 0 32 38 168-1027B- 3H-5, 95-100 20.65 IA T 6 34 60 3H-5, 104-109 20.74 IA M 1 42 57 6H-6, 37-43 50.07 IA T 6 44 49 6H-6, 55-60 50.25 IA M 5 37 58 8H-1, 88-93 62.08 IA T 9 42 49 8H-1, 97-102 62.17 IA M 5 49 45 17X-1, 31-34 145.81 IA M 11 45 44 17X-4, 5-10 150.05 IA T 2 43 54 17X-4, 12-17 150.12 IA M 5 49 46 22X-1, 135-150 194.85 IB M 3 42 54 25X-2, 61-63 224.51 IB M 1 39 60 28X-1, 40-43 251.70 IB M 1 48 51 29X-6, 61-64 269.01 IB M 3 44 53 33X-5, 11-14 305.51 IB M 12 26 62 33X-5, 15-18 305.55 IB T 38 23 39 36X-7, 17-19 337.57 IB M 6 40 55 39X-3, 34-35 360.64 IB M 3 32 65 40X-7, 29-31 376.29 IB M 2 49 49 43X-5, 125-150 403.05 IB M 2 38 60 50X-3, 10-12 466.10 IB M 2 40 57 50X-5, 13-15 469.13 II M 6 28 66 52X-5, 125-150 489.45 II M 4 43 53 55X-5, 38-41 517.38 II M 3 19 78 60X-6, 125-150 567.85 II M 11 30 59 Average for Site 1027 6 39 55 Standard deviation 7 8 8 Maximum 38 49 78 Minimum 1 19 39 168-1028A- 1H-2, 24-29 1.74 IA T 8 48 43 1H-2, 109-114 2.59 IA M 11 48 41 2H-1, 99-104 4.69 IA T 8 38 54 2H-1, 113-118 4.83 IA M 3 28 69 3H-1, 82-88 14.02 IA T 4 38 58 3H-1, 92-98 14.12 IA M 3 38 60 3H-3, 41-46 16.61 IA T 12 35 53 3H-3, 52-56 16.72 IA M 34 25 41 6H-5, 51-52 48.21 IA T 3 40 57 6H-5, 56-61 48.26 IA M 2 32 66 7H-6, 40-46 59.10 IA T 2 32 65 7H-6, 50-55 59.20 IA M 9 35 56 10H-2, 78-81 81.98 IB M 2 51 47 11H-5, 135-150 96.55 IB M 3 45 52 12H-6, 37-39 106.57 IB M 3 51 46 13X-2, 36-33 110.06 II M 10 46 43 15X-1, 34-36 124.14 II M 19 37 44 15X-5, 21-23 130.01 II M 3 48 50 Average 8 40 53 Standard deviation 8 8 9 Maximum 34 51 69 Minimum 2 25 41 168-1029A- 1H-2, 94-99 2.44 IA T 4 43 53 1H-2, 103-108 2.53 IA M 20 38 42 2H-3, 87-91 8.37 IA T 4 40 56 2H-3, 96-100 8.46 IA M 14 46 40 4H-2, 122-127 26.22 IA T 4 53 43 4H-2, 131-136 26.31 IA M 8 50 42 6H-4, 18-23 47.18 IA T 12 38 50 6H-4, 28-33 47.28 IA M 8 41 51 9H-2, 97-102 73.47 IA T 6 48 46 9H-2, 109-114 73.59 IA M 7 35 58 12H-1, 37-39 99.87 IB M 2 36 63 12H-2, 123-128 102.23 IB T 6 41 53 12H-2, 132-137 102.32 IB M 2 45 52 13X-3, 104-109 113.04 IB T 4 50 46 13X-3, 114-109 113.14 IB M 1 47 52 17X-3, 117-119 144.17 IB M 4 45 52 22X-7, 4-6 197.04 IB M 3 42 55 23X-2, 130-150 200.04 II M 6 40 54 24X-1, 102-103 208.22 II M 17 34 49 25X-2, 125-150 219.55 II M 19 52 30 Average 7 43 49 Standard deviation 6 6 7 Maximum 20 53 63 Minimum 1 34 30 168-1030B- 1H-2, 30-32 1.80 M 8 60 32 2H-3, 36-38 7.36 M 6 37 57 2H-5, 66-68 10.66 M 2 54 44 2H-7, 31-33 13.31 M 1 55 44 3H-2, 140-150 16.40 M 2 41 56 3H-5, 65-67 20.15 M 15 37 48 4H-2, 140-150 25.90 M 1 35 64 4H-4, 140-150 28.90 M 1 48 51 4H-5, 113-115 30.13 M 4 39 57 4H-6, 46-48 30.96 M 5 41 54 5H-1, 126-129 33.76 M 4 41 56 5H-2, 93-95 34.93 M 3 54 42 5H-5, 86-88 39.36 M 14 44 42 5H-6, 140-150 31.90 M 2 44 53 Average for Site 1030 5 45 50 Standard deviation 5 8 8 Maximum 15 60 64 Minimum 1 35 32 168-1031A- 1H-1, 51-53 0.51 M 3 48 49 1H-3, 59-61 3.59 M 1 45 53 1H-6, 35-37 7.85 M 1 37 62 2H-4, 81-83 14.11 M 6 44 50 2H-5, 130-150 16.10 M 0 47 53 3H-3, 16-19 21.46 M 0 65 35 3H-5, 14-17 24.44 M 3 46 51 3H-5, 140-150 25.70 M 0 53 47 4H-3, 93-95 34.93 M 3 40 57 4H-5, 140-150 35.20 M 0 51 49 5H-3, 57-59 40.87 M 11 53 36 Average for Site 1031 3 48 49 Standard deviation 3 8 8 Maximum 11 65 62 Minimum 0 37 35