SGOUR - Erosion,, e =;p8cially by noTing -"ater. See also EROSIOR. 



SEA ■'• (l) An ocean, ci" alternatively a large body of (usually) salt 

 water less than ari ocean; (2) Waves caused by xjind at the place 

 and tirae of observation; (3) State of the ocean or lake surface 



in regard to waves, 



SKA. (STATS of) - Description of the sea surface with regard to wave 

 action. 



SEA BREBiZE- « (l) A breeze blowing from the sea toward the land; 



(2) A light wind blowing tox-jard the land caused by unequal heating 

 of land and water masses. 



SEA CLIFF - A cliff situated at the seaward edge of the coast. 



SEA lEVEL - See ffiAM SM lEVELo 



SEA MOUNT - A submarine mountain rising more than ^00 fathoms above the 

 ocean, floor. 



SEA PUSS " A dangerous longshore current, a rip current, caused by return 

 floWj loosely the submerged channel or inlet through a bar caused 

 by those currents. 



SEASHORE - The SHORE of a sea or ocean. 



SEAWALL - A structure separating land and water areas primarily designed 

 to prevent erosion and other damage due to wave action. See also 

 BUltHEAD. 



SEICHE - A periodic oscillation of a body of water whose period is 



determined by the resonant characteristics of the containing basin 

 as controlled by its physical dimensions. These periods generally 

 range from a few minutes to an hour or more. (Originally the 

 term nas applied only to lakes but noi.-,' also to harbors, bays, 

 oceai..:!^ etc). 



SEISMIC SEA WAVE - (TSUNAMI) - A generally long period wave caused by an 

 underwater seismic disturbance or volcanic eruption. Commonly mis- 

 named "tidal wave". 



SEMIDIURMxU, TIDES - A tide with two high and two low waters in a tidal 



day^ with comparatively little diurnal inequality. (See Figure A-IO) 



SET OFCURRENT = The direction toward which a current flows. 



A-28 



