Rit (Vísindafélag Íslendinga) - 01.07.1962, Page 70

Rit (Vísindafélag Íslendinga) - 01.07.1962, Page 70
70 Considering the double glaciation of the slopes of Hvalfell on one hand, and the normal polarization on the other it is most likely that Hvalfell was formed in the Mindel-Riss inter- glacial, not later. On this basis the steep-sided river channel in the old valley would have formed before Mindel. This is in harmony with the results in Eyjafjörður (Einarsson 1959b) that the corresponding channel must be of rather early Pleisto- cene age. Súlur, Gagnheiði, Ármannsfell. The uppermost magnetic group of the Plateau Basalts at the head of Hvalf jörður is of normal polarity and was term- ed N2 in the publications of Einarsson and Sigurgeirsson (1956, 1957). On this group rest reverse lavas on Kjölur and at the hase of Kvígindisfell, termed R,. N2 is the last but one normal group in a local sense. But as the group belongs to the dipping plateau and is older than planation and valley erosion in the plateau there is no doubt that in a universal sense it is a much earlier magnetic group. It is one of the aims of the present study to fill up the gap between this youngest plateau group and the upper Pleistocene normal group. The Súlur massif is a heap of tuff-breccias of normal pola- rization which rests directly on the plateau group N2. The contact is at 550 m in the west, falling to 450 m in the east. On the west and north sides this contact runs along the steep mountain slope and it seems difficult to escape the conclusion that the Súlur rocks are older than this slope, i.e. older than the topography at the head of Hvalfjörður. But in this topography are represented the same erosional stages as we have recognized in the Plateau Basalt area of Middle Northern Iceland. The Súlur seem thus to be older than at least valley erosion, and hence much older than Hval- fell. This is also borne out by the advanced dissection of Súlur, This massif is cut by deep and broad valleys and an
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
Page 13
Page 14
Page 15
Page 16
Page 17
Page 18
Page 19
Page 20
Page 21
Page 22
Page 23
Page 24
Page 25
Page 26
Page 27
Page 28
Page 29
Page 30
Page 31
Page 32
Page 33
Page 34
Page 35
Page 36
Page 37
Page 38
Page 39
Page 40
Page 41
Page 42
Page 43
Page 44
Page 45
Page 46
Page 47
Page 48
Page 49
Page 50
Page 51
Page 52
Page 53
Page 54
Page 55
Page 56
Page 57
Page 58
Page 59
Page 60
Page 61
Page 62
Page 63
Page 64
Page 65
Page 66
Page 67
Page 68
Page 69
Page 70
Page 71
Page 72
Page 73
Page 74
Page 75
Page 76
Page 77
Page 78
Page 79
Page 80
Page 81
Page 82
Page 83
Page 84
Page 85
Page 86
Page 87
Page 88
Page 89
Page 90
Page 91
Page 92
Page 93
Page 94
Page 95
Page 96
Page 97
Page 98
Page 99
Page 100
Page 101
Page 102
Page 103
Page 104
Page 105
Page 106
Page 107
Page 108
Page 109
Page 110
Page 111
Page 112
Page 113
Page 114
Page 115
Page 116
Page 117
Page 118
Page 119
Page 120
Page 121
Page 122
Page 123
Page 124
Page 125
Page 126
Page 127
Page 128
Page 129
Page 130
Page 131
Page 132
Page 133
Page 134
Page 135
Page 136
Page 137
Page 138
Page 139
Page 140
Page 141
Page 142
Page 143
Page 144
Page 145
Page 146
Page 147
Page 148
Page 149
Page 150
Page 151
Page 152
Page 153
Page 154
Page 155
Page 156
Page 157
Page 158
Page 159
Page 160
Page 161
Page 162
Page 163
Page 164
Page 165
Page 166
Page 167
Page 168
Page 169
Page 170
Page 171
Page 172
Page 173
Page 174
Page 175
Page 176
Page 177
Page 178
Page 179
Page 180
Page 181
Page 182
Page 183
Page 184
Page 185
Page 186
Page 187
Page 188
Page 189
Page 190
Page 191
Page 192
Page 193
Page 194
Page 195
Page 196
Page 197
Page 198
Page 199
Page 200
Page 201
Page 202
Page 203
Page 204
Page 205
Page 206
Page 207
Page 208
Page 209
Page 210
Page 211
Page 212
Page 213
Page 214

x

Rit (Vísindafélag Íslendinga)

Direct Links

If you want to link to this newspaper/magazine, please use these links:

Link to this newspaper/magazine: Rit (Vísindafélag Íslendinga)
https://timarit.is/publication/1735

Link to this issue:

Link to this page:

Link to this article:

Please do not link directly to images or PDFs on Timarit.is as such URLs may change without warning. Please use the URLs provided above for linking to the website.