220  ROCK  DISINTEGRATION  AND   DECOMPOSITION

ANALYSES  OF  FRESH  AND  DISINTEGRATED  DIABASE  FROM  MEDFORD


SILT   FROM   DISINTEGRATED

FRESH  DIABASE

DISINTEGRATED
DIABASE

DIABASE,  Nos.  VII,  VIII,
AND    IX    OF    TABLE,    ON

P.  218

I

II

III

IV

V

VI

VII

CONSTITUENTS

.2

i»g

1-2  *

s

.2  ^

5

•a

a

2  •§  —  '

"S3
|

•it

III

'o  £  "«
a

2  -u    C3

t<81

»•*•>         ci

"33  a  a

>>  0    c3

S  c  «
t^  g  O

M
PQ

111

W

111

111

Us

I

Silica  (Si02)

%

%

%

%

%

%

fin  HC1      )
tin  Na2Co3  )

47.28

r  1.19

I   9.66

1  44.44

f   0.85
\    8.65

0.47
22.63

J13.51

36.61

Alumina  (Al20s)

20.22

4.74

23.19

4.86

21.98

Ferric  oxide

(Fe203).     ..
3.66

)

5.88

40.68

Ferrous  oxide

1  10.91

12.70

10.00

12.83

(FeO)     .    ..
8.89

J

Lime  (CaO)  ..
7.09

3.09

6.03

1.50

3.32

0.12

3.44

Magnesia  (MgO)

3.17

2.20

2.82

1.84

3.23

0.79

4.02

Manganese  oxide

MnO.     .     ..
0.77

Not  det.
0.52

Not  det.
Not  det.
Not  det.
Not  det.
Potash  (K20).
2.16

1.21

1.75

0.68

1.30

0.52

1.82

Soda  (Na20)  ..
3.94

0.50

3.93

0.17

0.90

1.24

2.14

Phosphoric  acid

(P206)   .     ..
0.68

Not  det.
0.70

Not  det.
Not  det.
Not  det.
....
Ignition     .     ..
