RRS John Murray JM1/68 Leg 2
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM1/68 Leg 2 |
| Cruise period | 1968-01-18 — 1968-01-29 |
| Status | Completed |
| Port of departure | Bilbao, Spain |
| Port of return | Las Palmas, Spain |
| Purpose | Research |
| Objectives | Aims
1. Reconnaissance - geochemical/geological investigations of the NW African Shelf 2. refraction, seismic and other geophysical studies in the Canaries. |
| Chief scientist | J S Tooms (Imperial College London Department of Geology) |
| Cruise report |  (12.08 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | North West Africa Shelf |
| Measurements | |
| Biology and fisheries | |
| Gear research | Description: tests of presssure casing of the UKAERE scintollometer |
| Geology and geophysics | |
| Dredge | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
| Grab | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
| Core - rock | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
| Core - soft bottom | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
| Bottom photography | Quantity: number of stations = 6 Description: camera on the Casablanca traverse |
| Single-beam echosounding | Description: echo-sounder watches kept |
| Seismic refraction | Description: each traverse had a continuous seismic profile taken before sampling |
| Magnetic measurements | Quantity: number of observations = 6 Description: magnetometer record between each traverse |
| Other geological/geophysical measurements | Quantity: number of surveys = 7 Description: traverses across shelf, 3 north of Canaries and 4 south - all crossed areas of different sedimentation conditions |
