96
Climatic Geomorphology
Figure 4.5. Paths of erratic blocks in the Scandinavian ice sheet. (1) Oslo District bedrock. (2) Dala
porphyries. (3) Aland Islands Rapakivi granites and quartz porphyries. (4) Lappaj~irvi Karnaite. (5) Viipuri
Rapakivi granites. (6) Lake Ladoga Rapakivi granites. (7) Umptek and Lujavr-Urt nepheline syenite.
(Compiled by Flint, 1971, from several authors).
1
rock fragment
5
peak
mineral grain
peak
' I I i/
I ! >
-3 -2 -1
0
1
2
3
4
5
6
7
8
2
0.5
0.125
0.03
0.008 mm
particle size
Figure 4.6. B i-modal distributions of particle sizes in a till (Dreimanis and Vagners, 1971, in Sugden and
John (1976), Figure 11.12).
Climatic Geomorphology
Figure 4.5. Paths of erratic blocks in the Scandinavian ice sheet. (1) Oslo District bedrock. (2) Dala
porphyries. (3) Aland Islands Rapakivi granites and quartz porphyries. (4) Lappaj~irvi Karnaite. (5) Viipuri
Rapakivi granites. (6) Lake Ladoga Rapakivi granites. (7) Umptek and Lujavr-Urt nepheline syenite.
(Compiled by Flint, 1971, from several authors).
1
rock fragment
5
peak
mineral grain
peak
' I I i/
I ! >
-3 -2 -1
0
1
2
3
4
5
6
7
8
2
0.5
0.125
0.03
0.008 mm
particle size
Figure 4.6. B i-modal distributions of particle sizes in a till (Dreimanis and Vagners, 1971, in Sugden and
John (1976), Figure 11.12).