Table 1—Shear strengths assigned to geologic formations in the Oat Mountain quadrangle.
|
SYMBOL |
FORMATION NAME |
f ¢ |
c¢ (lbs/ft2) |
|---|---|---|---|
|
Qal… |
Quaternary deposits (many units combined) |
34° |
350 |
|
Qsw |
Slope wash |
34° |
400 |
|
Qc |
Caliche |
34° |
400 |
|
Qls |
Landslide deposits |
30° |
500 |
|
QTs |
Saugus Formation |
34° |
400 |
|
QTsu |
Saugus Formation, Upper Member (silty breccia) |
34° |
450 |
|
QTsm |
Saugus Formation, Lower Member/Sunshine Ranch Formation |
34° |
450 |
|
Tp |
Pico Formation (undifferentiated) |
32° |
500 |
|
Tps |
Pico Formation (silt) |
30° |
500 |
|
Tpc |
Pico Formation (ss/cg) |
34° |
500 |
|
Tw |
Towsley Formation (ss) |
34° |
550 |
|
Tws |
Towsley Formation (shale) |
30° |
550 |
|
Twc |
Towsley Formation (ss) |
34° |
550 |
|
Tm |
Modelo Formation (shale) |
31° |
550 |
|
Tm1 |
Modelo Formation (shale/mud) |
31° |
550 |
|
Tm2 |
Modelo Formation (porcellaneous shale) |
31° |
600 |
|
Tm3 |
Modelo Formation (ss) |
34° |
550 |
|
Tm4 |
Modelo Formation (shale) |
31° |
550 |
|
Tmd |
Modelo Formation (diatomaceous shale) |
31° |
550 |
|
Tms |
Modelo Formation (shale) |
31° |
550 |
|
Tto |
Topanga Formation (ss) |
34° |
550 |
|
Ttb |
Topanga Formation (basalt) |
34° |
700 |
|
Tt1 |
Topanga Formation (shale) |
31° |
600 |
|
Tt2 |
Topanga Formation (ss) |
34° |
550 |
|
Tt3 |
Topanga Formation (shale) |
31° |
600 |
|
Tt4 |
Topanga Formation (ss) |
34° |
550 |
|
Tl |
Llajas Formation (ss, silt, clay, cg) |
34° |
600 |
|
Tlc |
Llajas Formation (calcareous ss) |
36° |
900 |
|
Ts |
Santa Susana Formation (clay shale) |
30° |
700 |
|
Tsc1 |
Simi Conglomerate (cg) |
34° |
850 |
|
Tsc2 |
Simi Conglomerate (shale) |
30° |
700 |
|
Tsc3 |
Simi Conglomerate (ss) |
34° |
800 |
|
Kc |
Chatsworth Formation (ss) |
40° |
1000 |
Conversion: 1 lb/ft2 = 0.0479 kPa.
|
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