Geology Reference
In-Depth Information
2
1
0
-1
-2
-3
700
600
500
400
Time (thousands of years ago)
300
200
100
0
Figure 10.4
Temperature changes over the last 750,000 years, showing alternating colder (glacial) and warmer
(interglacial) stages.
Elevation
(m)
9,000
6,000
3,000
Present snow line
Ice age snow line
0
90°N
60°N
30°N
0°
Latitude
30°S
60°S
90°S
Figure 10.5
Latitudinal cross-section of the highest summits and highest and lowest snowlines.
Source:
Adapted from Barry and Ives (1974)
