Field guide - IUGS

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Breakfast and dinner are usually associated with overnight accommodation. Lunches are planned in the nice outcrops in the field and trip organizers will prepare all necessary lunch materials. Weather: Kola Peninsula is situated at the latitude of 68 degrees N behind the polar circle. Besides, Khibina and Lovozero massifs occupy mountainous area up to 1200 m above sea level. Because of these two factors temperature during excursion may vary dramatically from +25 o C near the Apatity town down to +10 o C at the top of the mountains. Weather in the middle of August on White Sea shore is usually mild and cloudy. Rains are quite often. 4
General introduction Kola Peninsula is a key area for understanding of the glaciations evolution, especially at their final stages, of the development of glacioisostatic, eustatic and tectonic events during the Late Glacial and Interglacial time, and the character of interaction between the Ice Sheet and local mountain glaciations in high latitudes conditions. During the field trip we will examine: well preserved push and damp marginal moraines, subglacial interlobate ridge, and their geological structures (western part of the Kola Peninsula); landforms resulted from the glacial activity and displaying long-term glacialerosion features and smaller scale landforms which in great detail record the process of the deglaciation of the area, as the glacial cirques, marginal moraines, end moraines, hummocky moraines, De Geer moraines, lateral meltwater channels, spillways, troughs, delta formations, ice-dammed lake shoreline, tor-formations (Khibiny and Lovosero Mountains); features of the glaciotectonic rising of the Kola Peninsula in the form of the isostatically raised beach ridges (coast of the White sea) and the seismodislocations caused by the neotectonic activity of the Baltic Shield (area of the Imandra Lake); the well known in region interglacial section of marine sediments, which bear the evidences of the glacio-eustatic marine transgression (valley of the Varzuga River). Quaternary stratigraphic records of Kola Region Geological chronicle of the formation of unconsolidated cover on the Kola region begins with the Moscowian (Saalian) glacial horizon. It is overlaid by the Mikulinian (Eemian) Interglacial horizon and the Valdaian (Weichselian) glacial superhorizon. Moscowian (Saalian) glacial horizon (QBIIBms, MIS 6) Moscowian tills and melt-water deposits (gIIms, fIIms, lgIIms, gmIIms) overlie the basement rocks and eluvium and are located in the deepest depressions of the pre-glaciation relief and river valleys. They are found by same researchers in various times (Armand et al., 1969; Yevzerov, Koshechkin, 1980; Semjonova, 1998; Korsakova et al., 2004; and another) on western and central parts of Kola region (on the northeastern slopes of the Pechenga Tundra, in the area of the Kovdor alkaline-ultrabasic massif and Umbozero Lake), on the South and Northeast Kola Peninsula within the Terskii Coast of White Sea (at the lower parts of the Kamenka, Strel'na, Chapoma, Ust-Pyalka, Ponoi rivers, and at the valley of the Iokanga river and at the head part of the Svyatoj Nos Bay). There is an opinion (Armand et al., 1969), that in these cases the formation of the Moscowian (Saalian) Glaciation’ till came to the end in marine basin under the Dryas-like conditions (according to paleontological data). Judging from petrographic composition of the detrital material from the till horizon of the Moscowian (Saalian) Glaciation, ice flows moved towards the north-east in the north-western part of the region, and towards the south-east in the area of Kovdor massif and southern coast of the Kola Peninsula (Geology ..., 1995). Moskowian (Saalian) Glacial Horizon is overlaied by the Mikulinian (Eemian) or the Valdaian (Weichselian) Horizons in the all known sections. 5
Page 1 and 2: 33 IGC excursion No 34, August 14 -
Page 3: Abstract Partisipants will examine:
Page 7 and 8: ESR-age of subfossil mollusk shells
Page 9 and 10: independent low active Ponoi Glacie
Page 11 and 12: Fig. 1. Quaternary deposits of the
Page 13 and 14: EXCURSION STOPS Day 1: Arrive at Ap
Page 15 and 16: Day 2 Trip to the Lovozero Mountain
Page 17 and 18: 17 Fig. 2.3. Geomorphological map o
Page 19 and 20: 19 Fig. 2.5. U-shaped valley with S
Page 21 and 22: a b Fig. 2.7. Lateral meltwater cha
Page 23 and 24: Fig. 2.9. Kola recessive marginal b
Page 25 and 26: There are two opinions on the genes
Page 27 and 28: Fig. 2.14. Fragment of the dump mor
Page 29 and 30: Fig. 2.18. Orientation diagrams for
Page 31 and 32: een developed in a single field of
Page 33 and 34: Day 3: Trip along the Tersky Coast
Page 35 and 36: Stop 7. Quarry opening the glaciofl
Page 37 and 38: Fig. 3.5.The outcrop of the damp mo
Page 39 and 40: Fig. 3.7. Internal structure of fac
Page 41 and 42: On the Turii Peninsula profile (Fig
Page 43 and 44: Fig. 3.11. The prominent ridge(~30
Page 45 and 46: Day 4. Start in Varzuga village at
Page 47 and 48: and fine-grained sands, is exposed
Page 49 and 50: Fig. 4.3. Sediment and landforms in
Page 51 and 52: 51 Fig.4.6. Strel'na marine beds fr
Page 53 and 54: 53 Fig.4.8. Overview and scheme of
Page 55 and 56:
possible earthquakes (6.5), obtaine
Page 57 and 58:
Stop 13. Paleoseismic dislocation
Page 59 and 60:
glacial formations occurred, positi
Page 61 and 62:
Fig. 5.4. Geological map of the Khi
Page 63 and 64:
Ice dammed lakes features are large
Page 65 and 66:
Fig. 5.8. Glaciofluvial delta and m
Page 67 and 68:
67 Fig. 5.10. Cirques of Tachtarvum
Page 69 and 70:
Fig. 5.14. Scenario of the glacier
Page 71 and 72:
Helmens, K.F., Räsänen, M.E., Joc
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Field guide - IUGS

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