Table 1 Amplitudes of residual anomalies and morphometric properties of the overdeepening along the various profiles

Profile Nr. on Fig. 1

1

2

3

3

5

6

7

8

9

10

Width of main trough (m)

1250

3860

2450

2080

2000

1700

1600

3900

2380

2500

Maximum residual anomarly of main trough (mGal)

− 1.7

− 2.5

− 2.5

− 1.6

− 1.8

− 1.4

− 0.8

− 1.3

− 1.7

− 3.3

Base of storey 1 (m a.s.l.)

550

500

500

500

–

–

–

–

500

350–400

Base of storey 2 (m a.s.l.)

450–550

400

400

400

–

–

–

–

350

300

Base of storey 3 or inner gorge (m a.s.l.)

330–450

300–350

200–250

 < 300

–

–

–

–

300?

250–300

Width/Depth ratio of storey 1

30

 > 30

 > 40

20

–

–

–

–

 > 15

 > 15

Width/Depth ratio of storey 2

8

15

15

15

–

–

–

–

6

10

Width/Depth ratio of storey 3

2

6

1

 < 0.5

–

–

–

–

–

4

With/Depth of entire trough

5

19

7

8

–

–

–

–

12

10

Maximum thickness of the fill (m)

218

205

300

200

–

–

–

–

130

240

Density of fill, storey 1 (kg/m³)

2000

2000

2000

2000

–

–

–

–

2000

2000

Density of fill, storey 2 (kg/m³)

2150

2150

2150

2150

–

–

–

–

2150

2150

Density of fill, storey 3 (kg/m³)

2150

2150

2150

2150

–

–

–

–

–

2150

Slope angle of eastern margin storey 1 (°)

38.7

7.6

4.6

16.7

–

–

–

–

13

10.7

Slope angle of western margin storey 1 (°)

8.4

7.5

26.6

11.3

–

–

–

–

13.8

18.4

Slope angle of eastern margin storey 2 (°)

82.4

17.5

35.5

13.5

–

–

–

–

15.5

74.1

Slope angle of western margin storey 2 (°)

15.5

13.5

14

24.8

–

–

–

–

37.6

54.5

Slope angle of eastern margin storey 3 (°)

76

83.9

65.8

2.8

–

–

–

–

–

5.1

Slope angle of western margin storey 3 (°)

20

11.4

87.1

11.3

–

–

–

–

–

29.7