template_pc - GIANT CURRENT RIPPLE MARKS SATELLITE OVERVIEW...

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GIANT CURRENT RIPPLE MARKS: SATELLITE OVERVIEW OF THE NEW LOCATIONS ON THE EARTH. A.N. Rudoy 1 and S.S. Chernomorets 2 , 1 Tomsk State University, Russia, ru- [email protected] , 2 Department of Geography of Lomonosov Moscow State University, Russia, devdo- [email protected] . Introduction: Giant current ripple marks usually emerge following rapid outbursts of large periglacial and rock-dammed lakes given extremely high intensity of flow. They represent morphological and genetic macro-analog of sand current ripplet. We have produced analysis of known locations of giant current ripples and geographic conditions in which emergence of current ripples is possible at today’s stage of active degradation of glaciers and mass forma- tion of large periglacial lakes. Remote research was carried out – satellite image interpretation for various mountainous regions of the world – to discover other parts of the giant current rip- ples terrain. Discussion: Emergence of the exotic relief of giant current ripples is connected with out- burst of large lakes dammed by glacial or landslide dikes. After the outburst, the river fac- es extremely high intensity of flow for some time, and a terrain in the form of diluvium or flood dunes with height of dozens of meters emerges [1]. Until recently, three areas of giant ripples were thoroughly examined: basin of Co- lumbia River in the north-west of the USA, Altai and Tuva in Russia [1,3]. The age of the ripples in these areas goes back to the end of the late Pleistocene within the range of 7-22 thousand years ago [1]. As for other areas, giant ripples
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This note was uploaded on 05/11/2010 for the course GEOLOGY 43 taught by Professor Rudoya.n. during the Winter '10 term at American University in Bulgaria.

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template_pc - GIANT CURRENT RIPPLE MARKS SATELLITE OVERVIEW...

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