Table T14. Contamination observed in the interior of gabbro cores using fluorescent beads as bacterial mimics, Site 1253.
Core
Depth
(mbsf)
Sample
position
in core
Microspheres/
50 FOV
Microspheres
per mL of
gabbro
Delivery
confirmed
205-1253A-


32R 543.2 Outside 351 8,585 Yes


Interior 33 807
34R 552.9 Outside 174 4,256 Yes


Interior 4 98
36R 562.5 Outside 331 8,096 Yes


Interior 2 49
37R 566.0 Outside 68 1,663 Yes


Interior 4 98
38R 572.2 Outside 17 416 Yes


Interior 1 24
39R 577.2 Outside 839 20,522 Yes


Interior 3 73
41R 585.8 Outside 62 1,517 Yes


Interior 0 0
42R 589.9 Outside 1,643 40,188 Yes


Interior 0 0
43R 595.4 Outside NA NA No


Interior 3 73

Notes: FOV = a field of view using the 100x objective with an approximate area of 3.14 x 104 µm2. NA = not applicable.