Miscellaneous Information, Table III
Miscellaneous Information Numbers Refer to Number of Persons Involved
1951-65
1959-65
1966
U.S.A.
CAN.
U.S.A.–CAN
Terrain
Rock
536
24
46–4
Snow
293
26
27–0
River
3
0
0–0
Unknown
0
0
0–2
Ascent or Descent
(River crossing not included)
Ascent
405
28
35–2
Descent
368
21
34–1
Unknown
49
1
4–3
Immediate Cause
Fall or slip on rock
298
11
28–3
Failure of piton
20
1
0–0
Falling rock or object
79
7
8–1
1–0
Failure of rappel
45
1
Slip on snow or ice
120
10
13–0
Fall into crevasse
24
4
0–0
Loss of control in
voluntary glissade
40
3
3–0
Avalanche
61
7
3–0
Lightning
21
3
0–0
Stuck rope
5
0
0–0
Skiing
2
0
0–0
Faulty use of crampon
5
0
0–0
Fall in river
2
0
0–0
Exposure and/or exhaustion
42
1
1–0 0–0
Heat prostration
2
0
Illness, medical (including
pulmonary edema)
9
1
6–0
Exceeding abilities
(inexperience)
19
0
5–0
Miscellaneous
(including frostbite)
29
1
5–2
Contributory Causes
Climbing unroped
210
9
21–2
Climbing alone
53
4
11–2
Attempt to exceed abilities
(inexperience)
118
10
17–2
Darkness
10
0
1–0
2–0
Inadequate equipment
37
0
Old rope
4
0
1–0
Piton failure
13
1
1–1
1951-65
1959-65
1966
U.S.A.
CAN.
U.S.A.–CAN.
Bad weather
15
5
5–0
Exposure and/or exhaustion
10
3
2–0
Party separated
17
0
5–2
Age of Individuals
Boys
6
0
0–0
Under 15
24
1
0–1
15-20 years
261
12
33–0
“Young or college age”
14
1
0–0
21-25
186
4
14–2
26-30
84
11
4–1
31-35
61
1
9–0
Over 35
89
9
11–0
Unknown
78
11
2–2
Affiliation with Climbing Groups
Unaffiliated
211
9
21–2
Not stated
272
5
33–2
Member of mountaineering club.
340
36
19–2
Estimate of Experience
None or little
390
18
31–2
Moderate
Experienced
215
115
16
13
26–1 9–1
Unknown
102
3
7–2
Month of Year
January
25
1
3–0
February
43
1
2–0
March
31
0
2–0
April
46
1
6–2
May
67
0
5–0
June
91
2
7–3
July
185
29
13–0
August
151
14
14–1
September
75
1
11–0
October
41
0
2–0
November
36
0
4–0
December
19
0
3–0
Not specified
2
1
1–0