RRS John Murray JM5/68 Leg 2
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM5/68 Leg 2 |
| Cruise period | 1968-04-24 — 1968-05-06 |
| Status | Completed |
| Port of departure | Plymouth, United Kingdom |
| Port of return | Plymouth, United Kingdom |
| Purpose | Research |
| Objectives | Generally to investigate the geological nature of the sea-floor. More specifically:
1. Examine Hurd Deep to determine possible mode of origin 2. Continous seismic profiles and magnetometer traverses to collect data on sub-surface geological structure - 50° 10'N, 2degW and 4degW 3. Sample surface sediments at selected sites inshore and in the open sea 4. Continous seismic profiles and magnetometer traverses west of 5degW 5. Detalied bathymetric survey of lower submarine canyon system 6. Gain experience in laying bottome current meter stations |
| Chief scientist | Douglas Hamilton (University of Bristol Geology Department) |
| Cruise report |  (0.29 MB) |
| Ocean/sea areas | |
| General | English Channel Celtic Sea |
| Specific | Western English Channel and southern Celtic Sea |
| Measurements | |
| Physical oceanography | |
| Current meters | Quantity: number of deployments = 1 Description: buoyed |
| Current meters | Quantity: number of recoveries = 1 Description: buoyed |
| Biology and fisheries | |
| Phytoplankton | Quantity: number of stations = 1 Description: plankton sampling |
| Zooplankton | Quantity: number of stations = 1 Description: plankton sampling |
| Gear research | Description: sparker testing continued |
| Geology and geophysics | |
| Grab | Description: core, Shipek and Murray sediment samples taken |
| Core - soft bottom | Description: core, Shipek and Murray sediment samples taken |
| Bottom photography | Quantity: number of stations = 2 Description: underwater camera tested |
| Single channel seismic reflection | Quantity: number of surveys = 6 Description: sparker and magnetometer surveys |
| Magnetic measurements | Quantity: number of surveys = 6 Description: sparker and magnetometer surveys |
