Table 3. 
13C values of ethane in gas samples from Site 997.
| Sample identification |
Depth (mbsf) |
13C (  PDB) |
|---|---|---|
997A-27 |
216 |
-69.4 |
997B-2 |
329 |
-67.6 |
997A-44 |
351 |
-66.9 |
997A-52 |
413 |
-66.7 |
997B-5 |
425 |
-66.2 |
997B-13 |
484 |
-66.5 |
997B-17 |
510 |
-66.8 |
997B-22 |
554 |
-65.5 |
997B-27 |
593 |
-63.5 |
997B-31 |
630 |
-63.4 |
997B-37 |
671 |
-63.3 |
997B-45 |
727 |
-62.3 |