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Four Corner - Texas Water Development Board

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KEY TO TERMS AND SYMBOLS USED ON BORING LOGS<br />

~<br />

Clay<br />

~ aa,..,.<br />

~<br />

UphalUc<br />

Coa.cnt.e<br />

SOIL SYMBOLS<br />

!loll Typa<br />

illiill I]<br />

Slit<br />

Sand<br />

Waditiers<br />

illl []<br />

Silty Sandy<br />

Coaatruction )(a t.eria Ia<br />

... ,, ~, i<br />

.~ ..<br />

Stabilized<br />

Sue<br />

§<br />

FlU or<br />

Debrla<br />

~<br />

c ... ftl<br />

Thin 'tl'alled<br />

I Shelb7 Tube<br />

~<br />

Spilt Barn!<br />

SAMPLER TYPES<br />

~<br />

(] Liner Tu.IM B<br />

Cemented<br />

~<br />

Portland<br />

Cement<br />

Concrete<br />

~<br />

0<br />

No ReeoYery<br />

[) A~r<br />

Jar Sample<br />

WATER LEVEL SYMBOLS<br />

Croun4water lnwl determiDed durinc<br />

drill1Dc open.uoDa<br />

Croundwat.er left! after drillinc in<br />

~ open borehole or piezometer<br />

Clautnca Uon<br />

Clay<br />

Silt<br />

Sand<br />

Crud<br />

Cobble<br />

Boulder<br />

SOIL GRAIN SIZE<br />

Particle Size<br />

< 0.002 mm<br />

0.002 - 0.075 =<br />

0.075 - 4.75 mm<br />

4.7:5 - 75 mm<br />

75 - zco mm<br />

> 200 mm<br />

Particle Size or Slnw<br />

No. (U.S. Standard)<br />

< 0.002 =<br />

0.002 mm - 1200 aieTe<br />

#ZCO ai...-.. - 14 aieTe<br />

14 line - 75 mm<br />

75mm-200mm<br />

> 200 mm<br />

DENSITY OF COHESIONLESS SOILS<br />

V•f"J' Loo ..<br />

Looee<br />

lfedlum Danae<br />

DeDae<br />

Vef"J' Denae<br />

PenelraUon<br />

Reaiat&nce "N" •<br />

Blon/300 mm<br />

0 - •<br />

• - 10<br />

10 - :10<br />

30-50<br />

>50<br />

CONSISTENCY OF COHESIVE SOILS<br />

Vef"J' Sort<br />

Sort<br />

Finn<br />

surr<br />

Very Stiff<br />

Han!<br />

Undrained Shear<br />

S!.ren(th (kpa)<br />

0 - 13<br />

1:1 - 27<br />

27- ~<br />

~ - 107<br />

107 - 215<br />

> 215<br />

3-10-1:5<br />

:50/100 mm<br />

0/4!10 mm<br />

• The N nlue Ia taken u<br />

PENETRATION RESISTANCE<br />

Blo,. required t.o penetrate each of three eonaec:uUn !50 mm incrementa per AS7)( D-15118 •<br />

It more Ulan :50 bloW11 are required, driYinc ia diaeonUnued and penetration at 50 blo,. ia noted<br />

Sampler penetrated run depU. under '"'icht or drill rodl and hammer<br />

U.e blo,. required t.o penetrate U.e final :100 mm<br />

/ac/cuioa<br />

TERMS DESCRIBING SOIL STRUCTURE<br />

Fracture plznu appear pollahed or<br />

pouy, ""metima atrialed<br />

Brala alone definite planea of fracture<br />

wiU. UWe reaialance t.o l'racturlnc<br />

Small pocket& of dlnerenl aoU., auch<br />

.. email lenaea or a&nd acatlerecl<br />

U.roU(h a maa or clay<br />

!nclualon lea Ulan 8 mm thick<br />

extendinc U.rouch U.e sample<br />

!nclualon 8 mm t.o 7:5 mm U.ick<br />

extenciiDC U.roU(h U.e sample<br />

lnclualon creater Ulan 7:5 mm U.ick<br />

exlencllnc U.roU(h U.e aample<br />

Str.Un

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