Cruise inventory

RRS Discovery D11

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD11
Cruise period1966-04-15 — 1966-05-21
StatusCompleted
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
ObjectivesMain project for the first leg was to study the origin of the Bay of Biscay by mapping lineations in the magnetic and gravity fields, by exploring the buried basement using seismic profiling and by surveying and sampling two of the seamounts emerging from the abyssal plain.
Second Leg: to make seismic profiles across Gelicla Bank with a view to finding prominent strata which outcrop and which could be sampled.
Chief scientistAnthony S Laughton (National Institute of Oceanography)
Cruise reportRRS Discovery D11 cruise report d11.pdf — access key 'C' (0.62 MB) 
Ocean/sea areas 
GeneralBay of Biscay
SpecificBay of Biscay,
Track chartsRRS Discovery D11 cruise track — d11trk.pdf (0.03 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 9
Description: Investigation into the relationship between thermal gradients in the bottom water and in the sediments.
Chemical oceanography 
OxygenQuantity: number of samples = 9
Description: oxygen and silicate concentrations measured on all water-bottle samples.
SilicateQuantity: number of samples = 9
Description: oxygen and silicate concentrations measured on all water-bottle samples.
pHQuantity: number of cores = 7
Description: pH measurements were made on seven of the cores collected.
Biology and fisheries 
ZooplanktonQuantity: number of stations = 12
Description: Planktonic foraminifera were collected between 0 and 300m using an N50 net.
Geology and geophysics 
DredgeQuantity: number of hauls = 14
Description: Dredges.
Core - soft bottomQuantity: number of cores = 26
Description: Twelve small gravity cores and fourteen long gravity cores.
Bottom photographyQuantity: number of stations = 4
Single channel seismic reflectionDescription: Seismic reflection profiling.