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Table T3. Prominent lithologic horizons: sharp boundaries, Site U1331. (See table note.)

Unit Core, section,
interval (cm)		 Depth
CSF (m)		 Note Core, section,
interval (cm)		 Depth
CSF (m)		 Note Core, section,
interval (cm)		 Depth
CSF (m)		 Note
  320-U1331A- 320-U1331B- 320-U1331C-
I 1H-1, 74 0.74 Top of Mn crust            
IIa   2H-1, 143 6.63 Sharp boundary* 1H-5, 117 7.18 Sharp boundary* 1H-6, 5 7.56 Sharp boundary*
2H-3, 80 9.00 Sharp boundary 1H-7, 74 9.75 Sharp boundary 3H-2, 32 20.78 Sharp boundary
3H-4, 73 19.93 Sharp boundary            
IIb    6H-4, 143 49.13 Erosional contact* 4H-5, 9 35.21 Sharp boundary 4H-4, 77 33.55 Sharp boundary
6H-7, 9 51.79 Erosional contact* 6H-1, 133 49.43 Sharp boundary 4H-6, 36 35.99 Sharp boundary
      6H-3, 90 52.00 Sharp boundary      
      6H-4, 32 52.92 Sharp boundary      
IIc         10H-2, 111–112 83.82 Sharp inclined contact* 8H-5, 6 73.17 Sharp boundary      
10H-3, 39–44 84.64 Sharp inclined contact* 9H-4, 25 81.37 Sharp boundary      
10H-5, 13–15 87.35 Sharp inclined contact* 9H-5, 55 83.18 Sharp boundary      
10H-7, 42–49 90.19 Sharp inclined contact* 9H-7, 39 86.03 Sharp boundary      
11H-4, 43 95.25 Sharp boundary 10H-2, 10 87.70 Sharp boundary      
      10H-5, 127 93.37 Sharp boundary      
      10H-6, 127 94.87 Sharp boundary      
      11H-2, 91 98.01 Sharp boundary      
      11H-3, 22 98.82 Sharp boundary      
IIIa        12H-1, 14 100.34 Sharp color contact 11H-4, 79 100.89 Sharp boundary 12H-1, 28–35 129.35 Sharp boundary
12H-1, 92 101.12 Sharp contact† 11H-5, 40 102.00 Sharp boundary 12H-6, 119 137.49 Sharp boundary
12H-5, 22 106.42 Sharp contact† 12H-1, 88 105.98 Sharp boundary      
12H-7, 21 107.91 Sharp contact† 12H-2, 90 107.50 Sharp boundary 12H-CC, 1 138.84 Sharp boundary
12H-6, 50 108.20 Sharp contact† 13H-3, 27 117.87 Sharp boundary 13H-3, 73 142.23 Sharp boundary
12H-7, 67 109.87 Sharp contact† 14H-3, 56 127.66 Sharp boundary      
17X-CC, 22 138.84 Sharp boundary 14H-4, 51 129.11 Sharp boundary      
      14H-5, 60 130.70 Sharp boundary      
IIIc   22X-1, 21 186.61 Sharp boundary       17H-1, 132 185.32 Sharp boundary
            17H-1, 144 185.44 Sharp boundary
            17H-2, 29 185.79 Sharp boundary

Note: * = sharp inclined contact overlain by coarse-grained material (e.g., foraminifers and/or oxides), † = sharp irregular contact defined by color change.

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