ISAVSMELTING

Viek'sa. Kvartærgeologisk kart 2135 IV - M 1 : 50 000. Beskrivelse.

SKRIFTER
91
Publikasjonstype
Utgivelsesår
1989
Summary
The superficial deposits occurring within the map-sheet area are classified according to their genesis and described. Till is the dominating sediment, but considerable glacifluvial deposits also occur. Glacier movement directions have been reconstructed in seven phases and subphases. The two youngest subphases correlate with events during the deglaciation. The older phases are considered to span most of Weichselian time. Of the eight glacial events known from the Porsangerfjord area, three occur within the map-area: The Outer Porsanger, Korsnes and Repparfjord events, with estimated ages about 13,500 - 11,500 years B.P. A broad marginal zone was produced during the Outer Porsanger event, extensive glacifluvial deposits are related to the Repparfjord event. Radiocarbon datings are lacking, suggested ages are based on correlation with dated events elsewhere.
Forfattere
Lebesbye, Erland H.T.
Kommune
LEBESBY
PORSANGER
Fylke
TROMS OG FINNMARK
Tilgjengelig
NGU-biblioteket

Stiklestad. Kvartærgeologisk kart 1722 IV - M 1 : 50 000. Beskrivelse.

SKRIFTER
89
Publikasjonstype
Utgivelsesår
1989
Summary
The superficial deposits within the map-sheet Stiklestad are classified and
mapped according to their genesis. Ice movements and the course of deglaciation
have been reconstructed. The shore-level displacement has been investigated.
Several radiocarbon datings are presented.
Forfattere
Sveian, Harald
Kommune
INDERØY
STEINKJER
VERDAL
LEVANGER
Fylke
TRØNDELAG
Tilgjengelig
NGU-biblioteket

Brattvåg og Ona. Kvartærgeologiske kystsonekart 1220 III og 1220 IV - M 1 : 50 000. Forklaring til karta.

SKRIFTER
85
Publikasjonstype
Utgivelsesår
1988
Summary
The superficial deposits within the map sheets are discribed and classified according to their genesis. Within map sheet Brattvåg both land and sea areas are mapped. The dominant deposits are tills, marine sediments, weathering material and bogs. The area has been glaciated at least three times during the Weichselian with intervening interstadial periods. The last deglaciation occured some time before 12,300 years B.P., and several moraines were deposited. During Younger Dryas the ice front was situated far to the east of the area, but several cirque moraines were formed within map sheet Brattvåg. The regression was very rapid just after deglaciation and up to 9000 years B.P., but levelled off during Younger Dryas. The Holocene transgression maximum was reached at about 6000-7000 years B.P.
Forfattere
Larsen, Eiliv
Klakegg, Ove
Longva, Oddvar
Kommune
ÅLESUND
MOLDE
VESTNES
Fylke
MØRE OG ROMSDAL
Tilgjengelig
NGU-biblioteket

Rissa. Kvartærgeologisk kart 1522 II - M 1 : 50 000. Beskrivelse

SKRIFTER
82
Publikasjonstype
Utgivelsesår
1987
Summary
The superficial deposits occuring within the map-area are described and classified according to their genesis. In the mountains a discontinuous or thin cover of till dominates with peat in the depressions. In the lowland areas glaciomarine sediments were deposited at a sea-level situated c. 155 m above the present one. The deglaciation of this area took place during the Bølling and Allerød chronozones. During the Younger Dryas the glaciers andvanced to the Tautra Moraines, situated some 20 km to the cast of this map-area. This led to an intense calving of the glaciers in the Trondheimsfjord. Drifting icebergs caused a marked increase in the content of coarse-grained rock fragments in the glaciomarine sediments. During the shoreline displacement the sediments below the upper marine limits were influenced by fluvial erosion and slides. Short account are given on the potential for different utilization of the mapped superficial deposits.
Forfattere
Reite, Arne J.
Kommune
ØRLAND
INDRE FOSEN
ORKLAND
Fylke
TRØNDELAG
Tilgjengelig
NGU-biblioteket

Sunndalsøra 1420 III. Beskrivelse til kvartærgeologisk kart - M 1 : 50 000 (med fargetrykt kart).

SKRIFTER
79
Publikasjonstype
Utgivelsesår
1987
Summary
The superficial deposits within the map-sheet are described and genetically classified. Tills are the dominating sediments, but considerable amounts of glaciofluvial and fluvial deposits also occur. Slide and talus deposits occur widely in the valleys and weathering material blockfield is present in the higher areas. The oldest described ice striations probably represent a regional ice movement towards the northwest. This northwesterly ice movement was followed by other ice movements controlled mostly by the regional topograph during the folloving deglaciation. During both periods of glaciation diverging striae provide evidence for the existence of local culmination aeras in the mountains within the map-sheet Sunndalsøra. The progress of the moraine ridges in the Reinsvatnet area indicates the existence of an event, the Reinsvatn event. This event is thought to be of Younger Dryas age. The highest marine level during the deglaciation in Sunndalen occurs at some 145 m a.s.l. Radio carbon dating of shells found in glaciomarine clay indicates that Litledalen was deglaciated 9,740±250 C-years B.P.(T-4516).
Forfattere
Follestad, Bjørn A.
Kommune
MOLDE
SUNNDAL
Fylke
MØRE OG ROMSDAL
Tilgjengelig
NGU-biblioteket

Frosta 1622 II. Beskrivelse av kvartærgeologisk kart - M 1:50 000 (med fargetrykt kart).

SKRIFTER
75
Publikasjonstype
Utgivelsesår
1986
Summary
The superficial deposits occuring within the map-area are described and classified according to their genesis. In the mountains a discontinuous or thin cover of till dominates with peat in the depressions. In the lowland areas glaciomarine sediments were deposited at a sea-level situated c. 180 m above the present one. In Frosta and Skatval these sediments are overlain by till, deposited by a glacial advance during early Younger Dryas, reaching just to the west of the map-area. Marginal moraines from a late Younger Dryas glacial advance can be traced more or less continuously from Hegra in Stjørdal toowards Hoklingen and Alstahaug. During the shoreline displacement the sediments below the upper marine limit were influenced by fluvial erosion and slides. Short accounts are given on the potential for different utilization of the mapped superficial deposits.
Forfattere
Reite, Arne J.
Kommune
INDRE FOSEN
INDERØY
FROSTA
LEVANGER
STJØRDAL
Fylke
TRØNDELAG
Tilgjengelig
NGU-biblioteket

Ullensaker 1915 II. Beskrivelse til kvartærgeologisk kart - M 1 : 50 000 (med fargetrykt kart).

SKRIFTER
76
Publikasjonstype
Utgivelsesår
1987
Summary
The superficial deposits occuring within the mapped area are classified according to their genesis. Finegrained marine sediments are the dominating deposits. The map covers one of the biggest Preboreal glaciofluvial icefront deltas in Norway - the Hauerseter deposit. A silt layer - The Romeriksmjele - covering maine sediments, has been found to be a flood deposit settled during a Preboreal catastrophic flood. Iceflow direction has varied from SE to SV most likely being SV during maximum glaciation and during a late stage of deglaciation. Sealevel was 205 m a.s.l. during the Hauerseter event c. 9,500 BP and 150-160 m a.s.l. approx 9,200 BP. The clay deposits are severely dissected by river- and creek erosion and quick clay slides.
Forfattere
Longva, Oddvar
Kommune
EIDSVOLL
ULLENSAKER
NES
LILLESTRØM
Fylke
VIKEN
Tilgjengelig
NGU-biblioteket

Kristiansund 1321 II og Bremsnes 1321 III. Beskrivelse til kvartærgeologiske kart - M 1:50 000 (med fargetrykte kart).

SKRIFTER
74
Publikasjonstype
Utgivelsesår
1986
Summary
The superficial deposits within the map-sheets are classified genetically and described. The icemarginal line "Bremsnestrinnet" is reconstructed from the positions of terminal moraines in the fjord areas. Radiocarbon dating of the younger event "Tingvolltrinnet" further to the east to some 12 000 years, indicates that the "Bremsnestrinnet" is somewhat older, but no more than 13 500 years, at which time the continental shelf of Norway still thought to be covered by glaciers. Short accounts of the distribution of glacifluvial and fluvial deposits are given. Diverse tests have been carried out and are summarized in the "Grusregister".
Forfattere
Follestad, Bjørn A.
Kommune
KRISTIANSUND
AURE
AVERØY
TINGVOLL
Fylke
MØRE OG ROMSDAL
Tilgjengelig
NGU-biblioteket

Stjørdal 1621 I - M 1:50 000. Beskrivelse til kvartærgeologisk kart (med fargetrykt kart).

SKRIFTER
72
Publikasjonstype
Utgivelsesår
1986
Summary
The superficial deposits occurring within the map-area are described and classified according to their genesis. In the mountains till and organic deposits dominate. In the lowland areas glaciofluvial and glaciomarine sediments were deposited at a sea-level situated c. 180 m above the present one. During the shoreline displacement these sediments were strongly influenced by fluvial erosion and slides. The ice recession vas interrupted by a glacial advance during the first half of the Younger Dryas glacial advance ca be traced less continuously from the lakes Store Dragstsjøen - Foldsjøen towards Frigården, Lånke, and Hegra in the Stjørdal valley. Radiocarbon datings from Frosta, Levanger and Verdal indicate that these marginal deposits were formed during late Younger Dryas. Short accounts are given on the potential for different utilization of the superficial deposits.
Forfattere
Reite, Arne J.
Kommune
STJØRDAL
MALVIK
SELBU
Fylke
TRØNDELAG
Tilgjengelig
NGU-biblioteket

Bøkfjorden, Joakobselva og Grense Jakobselv. Beskrivelse til de kvartærgeologiske kartene 2434 I, 2534 III og 2534 IV M 1:50 000 (med fargetrykt kart.

SKRIFTER
70
Publikasjonstype
Utgivelsesår
1985
Summary
The superficial deposits occurring within the area covered by the map-sheets are classified genetically and described. Most of the deposits are tills covering wide areas in the southeast, where there are also many deposits of glaciofluvial origin. Fluvial deposits are deposited mainly in the Jakobselva valley, along the Russian border. Along the shore there are few superficial deposits, except for small marine deposits. Brief descriptions are given of the lithology and grain-size distribution of all the superficial deposits. A model for the sequence of geological events during the Quaternary era is proposed based on earlier work and recent field mapping. It is suggested that the deglaciation of the coastal area of Sør-Varanger took place about 12,500 - 10,000 years B.P.
Forfattere
Bakkejord, Knut J.
Lebesbye, Erland H.I.
Kommune
SØR-VARANGER
Fylke
TROMS OG FINNMARK
Tilgjengelig
NGU-biblioteket