Four Corner - Texas Water Development Board

I
!III] Silt
rnm~
if:l:l!Clayey
m Silt
SOIL TYPES
~Clay
~ Sclndy
&ii Clay
~Silty
8Ri Clay
Q Grauel
PNtar
Highly
Organoc
~ Ocbns
~Fill
SOU.. GRAIN SIZE
U.S. STANDARD SIEVE
6" J" 314" 10 40 200
BOULDERS I COBBL£5 111-__ G;;.;.RA~I.;.;VfL;;;;_ __ +-I __...,...._:;;SAN.:..;::D_,.__---111
COARSE FINE I COARSE I MEDIUM I FINE
15Z 76.2 19.1 4.76 2.00 0.420 0074
SOIL GRAIN SIZE JN Mll..L.JMETERS
STRENGTH OF COHESIVE SOILS Ill
Consisterocy
Undrained
Shear Strength.
Kips Per Sq Ft
SAMPLJER TYPES
~~ ~Aal 6-tnch seanng tnlerval.
Note · To ~ d4magc to s.mpjing tools. drMng tS limned to 50 blows dunng or alter seanng tntervaJ.
SOIL STRUCTURE 01
Slickensided ............. HaVing plAna ol wulmn• th4c appeu slick 4lld glouy. The degree ol slickenstdedness depertds upon
che spocing ol slickcnsadn 4lld the case ol bruk1ng along the"" planes.
Fissured ................ Concauung shnnk.lgr or relief cracks, chen filled ""th hne sand or .,It; usuaUy more or less vemcal.
Pocket
Parting
Inclusion of material ol different texture that is smaller than the diameter ol the sample.
Inclusion leu than 1/8 tnch thick extending through the sample.
Seam ................... Inclusion 1/8 inch to 3 inches thock extending through the sample.
Llyer .................. Inclusion greater than 3 inches thtek extending through the sample.
Lurunated .............. Sod sample composed ol altemanng partings or seams ol different sotl type.
lnterlayered ............. So~ sample composed ol alternating layers ol different soil type.
lntemuxed .............. ScMJ sample composed ol pctCkets ol different sotl type arid layered or laminated structure •• not ewlenc.
Calcareous .............. Ha\llng apprt