Page:Quarterly Journal of the Geological Society of London, vol. 33.djvu/188

150 150

AMUND HELLAND ON THE FJOKD8, LAKES,

the winter, for the icebergs " calve " from the glacier at that season also, as is stated by the Greenlanders, in so doing making cracks in the winter ice of the fjord.

The small ice-fjords of Alangordlek and Sarkardlek are situated in two branches of the Tasiussak, but are connected with each other by a glacier called Akuleakatua.

The general appearance of this resembles that of the glacier of Jakobshavn ; but all the phenomena are on a small scale except the moraines, which are larger. The rate of motion also is strikingly small compared with that given in the Table above : it cannot be measured accurately in a short time owing to the small angular variation ; but the glacier of Alangordlek did not move faster than 0*5 metre a day, Akuleakatua not faster than 0*4 metre a day.

The ice-fjord of Torsukatak (69° 50' N. lat., according to Dr. Eink) sends its bergs out through the Waigat ; it ia difficult to get to the glacier in summer, but I succeeded in reaching it over a lake called Taserssuak. This glacier descends in four arms into the sea, being divided by several NunataJcs : its northern arm gives rise to great bergs ; the others appear to produce only small bergs and " calf-ice." The glacier ends in a level vertical wall about 15 metres high, and is about 9000 metres broad. The fjord just below is closely filled with bergs and fragments of ice. From the end of the glacier to a place where the Inland Ice covers every thing is but a short distance. Stones and erratic blocks only occur near the edge of the glacier, the middle and most crevassed part being free from boulders : the slope of its surface is less than two degrees ; the rate of motion was measured as before, and the results are given below.

The Bate of Flow of the Glacier of the

Fjord of

' Torsulcatalc.

l9

"o

©

Day and Hour when

hours ch the noved.

rrt OJ

O ©

£"£

o

o

•r-l ■+2

©

o

d o

©

'©

c ,2

.-5 © '5b 53 ^ ©

^_i "*-' _a

o

a

ft

the rate of motion was measured.

Number of during whi point had j

Distance t by the poin hours.

Hourly m( the point.

Daily moti point.

Distance o point from border of t]

me tres.

metres.

metres.

metres.

I.

•»

21

3-28

0156

375

210

II.

From the 24th of July,

21

4-95

0236

5-66

367

III.

> at noon, to the 25th of July, 9 a.m.

21

772

0-368

8-82

1926

IV.

21

8-84

0421

10-10

4070

V.

21

8-89

0-423

10-16

4939

VI.

1

21

8-18

0-390

9-35

4968

In the last three measurements there may be a fault of 1 metre, the whole variation of angles being only 7 minutes during 21 hours. It is evident from the Table that the motion of the glacier is in-