Elevation profile B-B'

Ele

va

tio

n(m

)

50

40

30

20

10

0

Distance (km)

40 35 30 25 20 15 10 5 0

Line 62 B’B

Elevation profile A-A'

40 35 30 25 20 15 10 5 0

Ele

va

tio

n(m

)

50

40

30

20

10

0

AA’Line 04

Distance (km)

!

-720 -700 -680 -660 -640 -620

13

80

14

00

14

20

14

40

Surface elevation40

0

Bed elevation700

0

-1000

A

A’B

B’ Trough

Trough

Ridge

Halley 6a

Line 04

Line 62

Line 05

psy

(km

)

psx (km)

McDonaldIce Rumples

Ch

asm

1

Ch

asm

2

’LOW SHELFf’’LOW SHELFf’

’RAILWAY TRACK’

’RAILWAY TRACK’

’Railway track’

’LOW SHELF’’LOW SHELF’