Depth {Fathoms). Enter sonic depth at time 

 sampler reached bottom. 



Geomorphvlogy of Immediate Area. Enter 

 any information concerning the land or sub- 

 marine relief features of the area. 



Type of Sampler. Enter the name and type 

 Sampler, e.g., Kullenberg (gravity), Hydro- 

 Plastic (Piston), Orange Peel, Pipe Dredge. 



Weight of Sampler. Enter the approximate 

 total weight of the device (corers only). 



Ajyprox. Penetration. For core samples only, 

 as soon as the corer is brought aboard, measure 

 the length of sediment visible on the outside of 

 the coring tube, and enter the measurement in 

 feet and inches or centimeters. Indicate the 

 imlt of measurement. 



Length of Core. For core samples; measure 

 the length of the core sample in the coring tube 

 or plastic liner. Enter the measurement in feet 

 and inches or centimeters. Indicate the unit of 

 measurement. 



Rock Color Chart Core Numbers, Core Top, 

 Core Bottom. Examine the sediment at the top 

 and bottom of the core, and if a Geological 

 Society of America Rock-Color Chart is avail- 

 able, enter the matching color code number. If 

 a rock-chart, is not available, leave blank. 



Field Description of Core and Remarks. En- 

 ter field description of bottom sediment sample. 

 Enter remarks concerning operational diffi- 

 culties or instrument damages such as degree 

 of wire angle, dented core cutter, most of sam- 

 ple washed out, sample retained on core catcher 

 and cutting edge, core in sections (1,2,3), etc. 



Field Description. — A complete description 

 of a bottom sample consists of: One or more 

 adjectives descriptive as to size, composition, 

 or consistency ; one or more adjectives designat- 

 ing color; and one or more nouns naming the 

 class of bottom material. The descriptions 

 should be based on the nouns and adjectives of 

 table L-1, should indicate grain diameters 

 determined by comparison or estimation, and 

 should utilize the standard abbreviations given 

 in the Classification table for bottom samples 

 to be symbolized on nautical charts (table 

 L-1) and in part "S" of H.O. Chart No. 1, 

 Nautical Chart Symbols and Abbreviations, 

 September 1963. Descriptive terms needed, 

 which are not included in the chart, should be 

 written in full. Indicate the nature of the bot- 

 tom material by an adjective such as soft, hard, 

 or sticky and the size as coarse, fine, or medium. 

 Indicate the form of occurrence (reef, bank, 

 whole shells, or fragments) for shell and coral. 

 Wien consistency of the bottom is determined 

 by feeling with a leadline or pole and without 

 visual examination; it should be described by 

 an adjective, hard or soft, without a noun. The 

 use of "rocky" should be avoided for this pur- 

 pose and should be used only when it is known 

 that the bottom consists of material larger than 



stones, but no specimen can be obtained for 

 examination. 



The color of the specimen should always be 

 noted while it is wet, using the color names of 

 Part "S" of Chart No. 1. The terms "dark" and 

 "light" should never be used alone but should 

 indicate the intensity of a color. (When war- 

 ranted for special operations, rock-color charts 

 of the Geological Society of America will be 

 furnished for determination of coloration.) 

 The description should be recorded in the fol- 

 lowing order: size or consistency, color, com- 

 position, and classification. 



OBS. INIT. Enter observers initials. 



The original M-Sheet should not be packed 

 and shipped with the samples. It should be 

 hand carried or mailed separately. 



L-40 Labeling the Bottom Sediment Sam- 

 ple(s). — The bottom sediment sample label, 

 shown in figure L-24, should be securely at- 

 tached to all bottom sediment samples (core 

 liners, sample jars, wooden boxes, or canvas 

 bags). The items on the sample label should 



t TOPt 



n 



CORE SAMPLE 



D 



B0TT0I1 SAMPLE 



SAMPLE NO 



GENERAL LOCATION 



DEPTH I'f'mW 



COLLECTOR 



TOU.S. NAVAL OCEANOGRAPHIC OFFICE 

 WASHINGTON, D.C. 20390 



PRNC-NAVOCEANO-3I67/3I (Rev. 3-64) 



Figure L-2-i- Bottom sediment sample label. 



L-20 



