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SEABED SAMPLING

Tables 3 and 7 show the positioning data and description of samples. Sampling by corers was successful even on hard grounds.


Table 7: Cruise MARM11: grab description.
SAMPLE DESCRIPTION
Grab_01 Grab is full (ca. 60 l) of muddy bioclastic sand (10Y 5/1) constituted mostly by molluscs fragments; no evident structure were recorded. No evident living fauna on the surface. The thanathocoenosis is dominated by molluscs Timoclea ovata (dominant), Clausinella brogniartii (very common), Pitar rudis (dominant), Pteria hirundo, Mytilus sp., Cardita calyculata and by the scleractinian Caryophyllia sp.
Grab_02 Grab is full (ca. 60 l) of muddy bioclastic sand (7.5GY 5/1) constituted mostly by molluscs fragments; no evident structure were recorded. 10 cm below the surface a thin layer (ca 5 cm) of gravels was present. No evident living fauna on the surface. The thanathocoenosis is dominated by molluscs Cerastoderma glaucum (common), Turritella communis, Pitar rudis (dominant), Cardita calyculata, Mytilus sp.
Grab_03 Only one cobble fouled by epifauna (serpulids).
Grab_04 ca. 30 l of muddy bioclastic sand (5GY 5/1) constituted mostly by molluscs fragments; no evident structure were recorded. No evident living fauna on the surface. The thanathocoenosis is characterized by molluscs Mytilus sp., Timoclea ovata, Antalis dentalis. Calcareous algae were also present.



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2012-11-20