RRS John Murray JM4/79
Cruise summary report
|Ship name (ship code)||RRS John Murray (74MJ)|
|Cruise period||1979-04-03 — 1979-04-26|
|Port of departure||Barry, United Kingdom|
|Port of return||Barry, United Kingdom|
|Objectives||1) To clarify aspects of the near surface geography in the St George's Channel, Cardigan and Caernarvon bays arising out of previous research cruises.
2) To compare and contrast the performance of various seismic profiling equipment over known geological sequences in Cardigan Bay with the intention of establishing a series of test lines for the evaluation of seismic profiling equiptment
3) To carry out a calibration of the newly aquired La Coste Gravimeter over the Blackstones Bank gravity range, to the S.W. of Mull
4) To establish a grid of Gravity, Magnetic and Air-gun seismic profiling traverses across the Hebrides Terrace Seamount and to sample the Seamount using a rock dredge.
|Chief scientist||R J Whittington (University of Wales Aberystwyth Department of Geology)|
|Cruise report||(0.11 MB)|
|General||Irish Sea and St. George's Channel|
North East Atlantic Ocean (limit 40W)
|Geology and geophysics|
|Dredge||Quantity: number of deployments = 6|
|Core - rock||Quantity: number of cores = 4|
|Single channel seismic reflection||Quantity: track kilometres = 2222.4|
|Gravity measurements||Quantity: track kilometres = 1481.6|
|Magnetic measurements||Quantity: track kilometres = 1481.6|
Description: format: 0 means analogue trace.