Growth history of lake ice in relation to its stratigraphic, crystalline and mechanical structure

KEY WORDS (Continue on reverse side ll necessary and Identify by block number) Crystal growt~ Crystal st ructure Electrical conductivity Ice Orientation Stratigraphy Structure Thickness 20.ABSTRACT (Continue on reverse side II neceseary and Identify by block number) DOStudies of the growth history and structural characteristics of winter ice covers on two New Hampshire lakes are described.These investigations included measurements of ice cover thickness, characterization of the stratigraphic and crystalline structure of the ice, identification and classification of major ice types and measurements of electrolytic conductivity.The fo rmation of cracks and flaws in the ice and their effects on the mechanical properties of the ice were also investigated.A method of correlating ice growth with surface wind and temperature measu rement is described and the interrelationships of the various physical and mechanical properties of temperate lake ice cove rs are discussed.