Surveyor 40/70

Cruise summary report

Cruise Info. 
Ship nameSurveyor
Cruise identifier40/70
Cruise period1970-06-23 — 1970-07-10
Port of departureFairlie, United Kingdom
Port of returnOban, United Kingdom
ObjectivesThe principal scientific aims of the programme were:
1. to investigate the continuation of the Great Glen Fault and associated faulting in the area from Lismore Island to south west of Colonsay - locating its position, finding whether it bifurcates, and elucidating its history of post-palaeozoic movements by determining the development of Mesozoic and younger strata on both sides of it;
2. making detailed investigations of the submerged Tertiary igneous centre near Stanton Banks which has been recognised from the I.G.S. aeromagnetic maps by the Geophysics Section of I.G.S. some years earlier.
Chief scientistAdam C McLean (University of Glasgow Department of Geology)
Cruise reportSurveyor 40/70 cruise report 40_70.pdf (3.20 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsSurveyor 40/70 cruise track — trk1331.html Surveyor 40/70 cruise track — trk1837.html Surveyor 40/70 cruise track — trk1837a.html Surveyor 40/70 cruise track — trk1837b.html
Geology and geophysics 
Multi-beam echosoundingQuantity: track kilometres = 815
Single channel seismic reflectionQuantity: track kilometres = 815
Seismic refractionQuantity: number of track lines = 8
Description: Each line shot both ways. Total of 204 track kilometers.
Gravity measurementsQuantity: track kilometres = 1037
Magnetic measurementsQuantity: track kilometres = 815