Environmental Engineering Reference
In-Depth Information
FIGURE 6
Modern examples of burrows in deposits containing organic matter. (A) Core 16867-3
(2.2
S, 5.1
E; 3,894 mwater depth; 1,655-1,695 cm), producers of
Zoophycos
(
Z
) displacedmaterial
downward as indicated by sediment color;
Z
1
fromthe top carbonate ooze layer,
Z
2
fromthe blackmud
layer. (B) Core 12337-5 (15
58.4
0
N, 18
07.1
0
W, 3,082 mwater depth; 34-44 cm; X-ray radiograph
negative); cross-cutting relationships suggest a four-tier bioturbated zone. (C and D)
Sonne
Cruise
187, core 61-2 (11
25.5
0
N, 111
17
0
E, 2,226 m water depth); X-ray-radiograph negative; (C)
487-493 cm core depth; (D) 505-512 cm core depth; bioturbation within the oxygenminimum zone;
lowoxygenation indicatedby the highproportionof biodeformational structures, andby the small size
of traces. h, homogeneous (biodeformational structures); s, shear plane formed during retrieval of the
core;
Ch
,
Chondrites
;
P
,
Planolites
;
Sc
,
Scolicia
;
Th
,
Thalassinoides
;
Z
,
Zoophycos
.
Search WWH ::
Custom Search