CD 157: Investigating the submarine canyons off Portugal


 


Coring...in pictures!

Coring is the main activity on this cruise. The coring gear is lowered over the side of the ship down to the seabed using a winch. When the corer hits the seabed, it pushes through the sediment, allowing a column of sediment to fill up the empty tube inside the core barrel. When the tube is full, a mechanism at the end of the corer closes to stop the sediment falling out, and the whole aparatus is winched back up the ship. It's a lengthy process, especially when you're working in a water depth of several thousand metres! And it's a 24 hour activity too - coring carries on through the night!