RRS John Murray JM10/69

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM10/69
Cruise period1969-12-03 — 1969-12-18
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
ObjectivesThe main objective was to obtain an network of closely space geophysical runs in St. George's Channel with bottom samples. It was intended to obtain from the geophysical survey a 3D picture of the superficial cover and the patterns of the sea bed sediment movement. Collect samples of the sea bed on a grid pattern using dredges and grabs principally to study sediment type. Obtain box cores as part of a programme to study geotechnical properties of the boulder clay and recent sediments.

Secondary objectives were: to make a gravity survey of Tremadoc bay; to make a sparker traverse; to make geophysical runs; to collect bottom samples
Chief scientistMaxwell R Dobson (University of Wales Aberystwyth Department of Geology)
Cruise reportRRS John Murray JM10/69 cruise report john_murray10_69.pdf (0.62 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificSt George's Channel
Biology and fisheries 
Other biological/fisheries measurement
Geology and geophysics 
Other geological/geophysical measurements