−30˚ −28˚ −26˚ −24˚ −22˚ −20˚ −18˚ −16˚
68˚
69˚
70˚
71˚
72˚
0 100
km
−1000
−1000
−1000
−1000
−1000
−500
−500
−500
−500
−500
−400
−400
−400
−400
−400
−400
−400
−300
−300
−300
−300
−300 −300
−300
−300
−300
−200
−200
−200
−200
−200
−200
−200
−200
−100
−100
−100
−100
−100
−100
−100
0
0 0
0
0
0
0
0
−6000 −4000 −2000 0 2000 4000
Bathymetry/topography [m]
ODP Site 987
Kolbeinsey Ridge Figure 2 Greenland
Scoresby Sund
Trough Mouth Fan
R1
0.99Ma
1.77Ma
2.58Ma
II
IV
IIIA IIIB
I
R4 R3
Two-way travel time (seconds) R2 ODP Site 987
Seismic stratigraphy Lithostratigraphy
SW NE N
Acoustically laminated signature
Clay Silty clay Silt Fine sand Medium sandCoarse sand
0.78 Ma 0.99 Ma 1.07 Ma
1.77 Ma 1.95 Ma
2.14 Ma
Ice-rafted debris Age model
Unit I: silty clay with thin sand layers and scattered clastsII: muddy diamictonIII 0
100
200
300
400
Depth (mbsf)
Unit I
Unit II
Unit III
ODP Site 987 D/E
Facies i: Silty clay, irregular boundaries, clay clasts/lenses, sharp color changes Facies ii: Silty clay, horisontal- semi- horisontal boundaries, color banding
Massive, muddy diamicton
Shear zone(?)
Facies iii: Sand layer/lamina
Core disturbance
a)
Facies i Facies ii
Lithological unit I Lithological unit II
Facies iii
Shear zone at the base
of the unit
b) c) d) e)
f)
10cm