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I used for designation of subsurface materials on boring logs and subsurface sections M ROCKS LESS THAN 0.25 m Lim.slone MEDIUM STIFF 1 STIFF Sillstone M Crystalline Lilrleslone HARD to M Bedded Cheri el OD M ssr,it 00e o,ot e w cloy n MOrplt Fol Void (Inalcast Site of Void) ® N ® Water Chalk COoal ^ ApprodmOH E.is inq Grouad Surtace ® M OVERBURDEN: Dolamile Cr Solt Olt ® Anhydrite .::...:;.: Limestone C he" q D, Nodule( Of "l of a Flml GI «ial till ¢n o z I•, •: ',I Gforel [A of q k— J of i� Er(. saga Illfff sill z� ® Clay W Y m cc, W W W Organic Motaiol O used for designation of subsurface materials on boring logs and subsurface sections CONSISTENCY OF COHESIVE SOILS CONSISTENCY SEDIMENTARY ROCKS LESS THAN 0.25 ® Lim.slone MEDIUM STIFF Sigma STIFF Sillstone M Crystalline Lilrleslone HARD Sandstone Bedded Cheri el Gneiss M ssr,it 00e o,ot e w cloy n MOrplt Fol Void (Inalcast Site of Void) ® 5tlole ® Water Chalk COoal ^ ApprodmOH E.is inq Grouad Surtace ® Gydsvm ® Dolamile ® Solt Co.91"erate ® Anhydrite Limestone C he" q D, Nodule( Of "l of a Flml CONSISTENCY OF COHESIVE SOILS CONSISTENCY UNCONFINED COMPRESSIVE STRENGTH TONS PER SQUARE F007 VERY SOFT LESS THAN 0.25 SOFT 0.25 TO 0.50 MEDIUM STIFF Q50 TO t 0 STIFF 1.0 TO 2 0 VERY STIFF 2.07040 HARD MORE THAN e.0 DENSITY OF GRANUI All Sna S DESIGNATION BLOWS PER FOOT VERY LOOSE 0.4 LOOSE 5.10 MEDIUM DENSE 11.30 DENSE 3150 VERY DENSE OVER 50 METAMORPHIC & IGNEOUS ROCKS: MISCELLANEOUS VERY SOFT CRUSHES UNDER PRESSURE OF FINGERS AND /OR THUMB Scllistoae Or - Gnelssold Granite ' Slog MEDIUM HARD BREAKS EASILY UNDER SINGLE HAMMER SLOW BUT WITH CRUMBLY EDGES HARD 4(}>7, Gronile Fill VERY HARD BREAKS UNDER SEVERAL STRONG HAMMER BLOWS BUT WITH VFRY RESISTANT SHARP EDGES AND MAY SPALL LEAVING CONCHOIDAL FRACTURES Gneiss Contrele Ooortf.le Fol Void (Inalcast Site of Void) Schist ® Water Slow Lo.a Flows ^ ApprodmOH E.is inq Grouad Surtace A«ro.imote Top 01 Race e'o,'o oo Bedded Tu11 ' STANDARD PENETRATION RESISTANCE IS THE NUMBER OF BLOWS REQUIRED TO DRIVE A 2 INCH O.D. SPLIT BARREL SAMPLER 12 INCHES USING A 140 POUND HAMMER FALLING FREELY THROUGH 30 INCHES. THE SAMPLER WAS DRIVEN IS INCHES AND THE NUMBER OF BLOWS RECORDED FOR - EACH 6 INCH INTERVAL. THE RESISTANCE TO PENETRATION IS INDICATED ON THE DRAWING AS BLOWS PER FOOT. CL[.I f1[.L ....Gs 1 Of .1..0..0.. E.. O.[FrFOf s• t sa- »' .• .a .20 .ro .n.ro .HO.mF ,Om 1001... a 1A n OY O0p oa c«n[s Llwu s..o I'll ..O fit, Cathy, n.[ ....St wEo.. n.( US CS CLASSIFICATION FOR SOILS I CO(tl LWLO[I ( I It NL( -. L... I.• 11:cfl w �Ta;� sllslo.[ WENTWORTH SCALE FOR ROCK TERMS USFO TO OFSrPiRF THE RFl ATIVF nmarrK n[ o DESCRIPTIVE TERMS DEFINING CHARACTERISTICS VERY SOFT CRUSHES UNDER PRESSURE OF FINGERS AND /OR THUMB SOFT CRUSHES UNDERPRESSURE OF PRESSED HAMMER MEDIUM HARD BREAKS EASILY UNDER SINGLE HAMMER SLOW BUT WITH CRUMBLY EDGES HARD BREAKS UNDER ONE OR TWO STRONG HAMMER BLOWS OUT WITH RESISTANT SHARP EDGES VERY HARD BREAKS UNDER SEVERAL STRONG HAMMER BLOWS BUT WITH VFRY RESISTANT SHARP EDGES AND MAY SPALL LEAVING CONCHOIDAL FRACTURES CL.. MpYI I.K1K1lS CunTO.L .w0 s••.L[« RO THE SPACING OF THE DISCOUTINU171ES IN THE ROCK MAY BE DESCRIBED BY ONE OF THE FOLLOWING TERMS DESCRIPTIVE TERMS SPACING VERY BROKEN LESSTHANA W BROKEN 1 N. TO 3 W SLIGHTLY BROKEN 3 W. TO 6 W MASSIVE 6 N AND GREATER ew.,,,tsiiiK,...n� mane u..1r s...nrw 7" O.D. SPLIT BARREL SAMPLE NUMBER +•• w• VILYL 510.5 "'4t PFNE7NA710N REFUSAL RESISTANCE AND -"�.�FRACTIONAL INCREMENT DRIVEN IN FEET { •10.75' ;I GROUND WATER LEVEL AND DATE U.S.C.S ; ?'1UNIFIEO SOIL CLASSIFICATION SYSTEM (CAPITAL LE TTERS !„;INDICATE LAB TEST CLASSIFICATION. LOWER CASE LETTERS INDICATE VISUAL FIELD CLASSIFICATION). AMPLE NUMBER s » :t�3 "' UNDISTURBED SAMPLE (SHELBY TUBE) RECOVERY INCHES { T IC LIMIT IPLI ATTERBERG LIMITS ,OUID LIMIT (U.) -ROD (ROCK QUALITY DESIGNATION - PERCENT) ; 1'(LENGTH OF NUMBER OF PIECES GREATER THAN 4 INCHES (601 ''DIVIDED BY THE LENGTH OF THE CORE RUN) 90, 1— INDICATES PERCENT OF CORE RECOVERED (LENGTH OF CORE RECOVERED DIVIDED BY LENGTH OF CORE RUN) C DRILLING FLUID LOSS —% � J . DRILLING FLUID REGAINED __ % TRACE - INDICATES PRESENCE OF 5 TO 12 % OF SUBJECT MATERIAL BY WEIGHT SOME - INDICATES PRESENCE OF 12 TO 30% OF SUBJECT MATERIAL BY WEIGHT. AND - INDICATES PRESENCE OF 45 TO 55% OF SUBJECTAAATERIAL BY WEIGHT. THE BORING LOGS AND RELATED INFORMATION DEPICT SUBSURFACE CONDITIONS ONLY AT THE SPECIFIC LOCATIONS AND DATES INDICAT(D SOIL CONDITIONS AND WATER LEVELS AT OTHER LOCATIONS MAY DIFFER FROM COFfDITIONS OCCURRING AT THESE BORING LOCATIONS. ALSO THE PASSAGE OF TIME MAY RESULT IN A CHANGE IN THE CONDITIONS AT THESE BORING LOCATIONS. ,t SUBSURFACE DE SCRIP7IONS SHOWN IN PAR[ N 1 111. SE S I I INDICATE CLASSIFICATION FROM WASH SOIL fit IAINED ON DRILL TOOLS OR ACTION OF DRILL TOOL S DURING ADVANCEMENT OF BORING GENERAL NOTES AND LEGEND LOWER TAILINGS DAM BULLDOG MOUNTAIN OPERATION PREPARED FOR HOMESTAKE MINING COMPANY CREEDE, COLORADO IDt it—'bup_'q�rA1W1 -1A. I IIINI IIIII IIIN IIIII liiil !iii Ili! 19868