Geological Survey of Finland, Special Paper 46 - arkisto.gsf.fi

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Geological Survey of Finland, Special Paper 46 Alexander N. Lastochkin and Alexandra Y. Krotova-Putintseva Hypsobathymetric data (Lythe et al. 2000) and the morphodynamic concept with its system-morphologic principle (Lastochkin 1991), applied to the subglacial-submarine surface of the Antarctic have provided new notions about the morphotectonics of the Antarctic. We assumed that the lifetime of ice cover – 25-35 million years (Losev 1982) is commensurable with 158 INTRODUCTION the neotectonic period of Earth crust evolution. In general, neotectonic movements defi ned the height and depth amplitude of modern relief, and morphology and contrast of its forms. The latter were preserved from lithodynamic processes and are the most objective indicators of concurrent tectonic movements. PRINCIPLES OF MORPHOTECTONIC ZONING OF THE ANTARCTIC A morphotectonic map (Figs. 1, 2, 3) is the result of morphotectonic interpretations of subglacial-submarine relief orography. The morphotectonic map shows morphotectonic regions (morphotectonic Fig. 1. Morphotectonic map of the Antarctic (authors: Lastochkin A. N., Krotova-Putintseva A. Y.)
Fig. 2. Legend of the morphotectonic map of the Antarctic (morphostructures). Fig. 3. Legend of the morphotectonic map of the Antarctic (morphotectonic regions). Geological Survey of Finland, Special Paper 46 Morphotectonic investigations of the Antarctic 159
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GEOLOGICAL SURVEY OF FINLAND Specia
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Johansson, P. & Sarala, P. (eds.) 2
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4 CONTENTS Preface, Peter Johansson
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Geological Survey of Finland, Speci
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Applied Quaternary research in the
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DRUMLINS IN KUUSAMO AND RANUA In Ko
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RIBBED MORAINES IN SOUTHERN FINNISH
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ued fl owing from west to east but
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Sarala, P. 2005a. Glacial morpholog
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Pleistocene deposits in southern Li
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Heavy minerals Medininkai Upland Ei
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The South Lithuanian phase of glaci
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Fig. 4. Lateral drainage channels o
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for dating. The deglaciation of nor
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In Lokka, the sheetfl ow tracks wer
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Fig. 5. A compilation of low altitu
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deposited over the fi lled channel,
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Michigan Lobe as it advanced into t
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Type IV Tunnel channels The Type IV
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Attig, J. W., Mickelson, D. M. & Cl
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