INTERNATIONAL HYDROGRAPHIC			 INTERGOVERNMENTAL OCEANOGRAPHIC
    ORGANIZATION					   COMMISSION (of UNESCO)
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UNDERSEA FEATURE NAME PROPOSAL   OHO/IOC form No. 1
(See Note overleaf)
Ocean or Sea 			Atlantic			Name proposed      MARKOV hole (deep)
Coordinates: А —   of midpoint or summit: Lat. 	5°54’,0 N  	Long. 		33°11’,5 W 		  
______________ kilometers in ___________________ direction from _________________________
and/or B — extremities (if linear feature):
Lat. ________________________   to        Lat. ________________________
Long. ______________________              Long. ________________________
Description (kind of feature): 		Deep				
Identifying or categorizing characteristics (shape, dimensions, total relief, least depth, steepness, etc.): Unusially deep hole in the axial rift (probably the deepest point in Atlantic rift system). Orientation – NW-SE. Lengs – near 12 miles. Situated in axial valley of the Mid-Atlantic Ridge to south from Sierra-Leone FZ 
Associated features: _______________________________________________________________________________
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Chart reference:
Shown with name on chart No. ____________________________-_____________________________________
Shown but not named on chart No. _________________________-____________________________________
Not shown but within area covered by chart No.	 	5.08 GEBCO, 1982		
Reason for choice of name (if a person, state how associated with the feature to be named): Named after professor M.S.Markov (1929-1988), geologist from Geological Institute RAS. He studied tectonic evolution of the oceanic crust, continents and planets. He was in some crouses of Russian research vessels 
Discovery facts:
Date	 June, 2000	 by (individuals or chip) R/V “Academician N.Strakhov”
By means of (equipment):  		Multi-Beam Simrad EM-12				
Navigation used: 				GPS								
Estimated positional accuracy in nautical miles: ± 25 m
Description of survey (track spacing, line crossings, grid network, etc.): 	full covering survey
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Nature and repository of other survey activities (dredge samples, cores, magnetics, gravity, photographs, etc.): _________
, magnetics						 _________________________________________________________________________________________________________________________________________________
Supporting material: enclose, if possible, a sketch map of the survey area, profiles of the feature, etc., with reference to prior publication, if any:	 Bathymetric map and map Shaded Relief with tracks			 _____________________________________________________________________________
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Submitted by:  	Agapova G.V. _________________________________________________________________________________
Date:                       20 February 2001		
Address:                  Geological Institute of the Russian Academy of Sciences, Pyzhevsky, 7, 109017 Moscow Russian Federation __________________________________________________________________________________
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Concurred in by (if applicable): ________________________________________________________________________
Address:                  __________________________________________________________________________________
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National Authority (if any): _______________________________________________________
Address:                  __________________________________________________________________________________
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NOTE: This form should be forwarded, when completed:
а) If the undersea feature is located in territorial waters: — 
to your “National Authority for Apporoval of Undersea Features Names” or, if this does not exist or is not known, either to the International Hydrographic Bureau or to the Intergovernmental Oceanographic Commission (see addresses below);
b) If the undersea feature is located in international waters: —	
to the International Hydrographic Bureau or to the Intergovernmental Oceanographic Commission, at the following addresses:
International Hydrographic Bureau					Intergovernmental Oceanographic Commission
7, Avenue President J.F.Kennedy					UNESCO	
B.P. 445								Place de Fontenoy
MC 98011 MONACO CEDEX					75700 PARIS
Principality of MONACO 						FRANCE
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