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CONDITIONS OF SEDIMENTARY DEPOSITION.

509

ANALYSES—PARTS PER 1,000,000 OF WATER.

Constituents.	Ottawa.	St. Lawrence.	Mississippi.	Missouri.	Missouri and Mississippi.	Missouri and Mississippi.
	a	b	c	d	e	f
Total Solids	—	—	253.69	1207.66	1058.98	787.12
Filtered sediment	69.75	167.80	20.90	638.26	622.33	389.36
K	1.52^{[note 1]}	1.15^{[note 1]}	not given	not given	not given	not given
Na	2.39^{[note 1]}	5.03^{[note 1]}	3.37^{[note 1]}	12.76^{[note 1]}	9.16^{[note 1]}	10.37^{[note 1]}
MgO	2.36^{[note 1]}	12.08^{[note 1]}	28.26	41.96	37.51	39.40
CaO	13.88^{[note 1]}	44.92^{[note 1]}	52.93	110.15	109.63	94.90
Cl	.76	2.42	5.31	19.53	14.22	15.93
SO₃	1.61	6.87	10.28	89.76	73.66	69.89
SiO₂	20.60	37.00	not given	not given	not given	not given
	69.75	167.80	20.90	638.26	622.33	389.36
Iron and alumina	traces	traces	none	55.84	20.90	26.80

According to Gooch^[1] the combination in these analyses should be calculated in the order KCl, NaCl, K₂SO₄, Na₂SO₄, MgSO₄, CaSO₄, MgCO₃, CaCO₃, Na₂CO₃, etc.; and this is the order followed in the Canadian analyses. Hence the following is the hypothetical combination.

	a	b	c	d	e	f
Total Solids	—	—	253.69	1207.66	1058.98	787.12
Filtered sediment	69.75	167.80	20.90	638.26	622.33	389.36
KCl	1.60	2.20	not given	not given	not given	not given
NaCl	—	2.25	8.57	32.03	23.30	26.38
K₂SO₄	1.22	—	not given	not given	not given	not given
Na₂SO₄	1.88	12.29	not given	not given	not given	not given
Mg SO₄	none	none	15.41	125.90	118.49	104.83
Ca SO₄	none	none	none	9.93	none	none
Mg CO₃	6.96	25.37	19.63	none	1.37	4.28
Ca CO₃	24.80	80.83	94.56	189.35	195.79	169.47
Na₂CO₃	4.10	0.61	none	none	none	none
Fe₂O₃ + Al₂O₃	traces	traces	none	55.84	20.90	26.80

The chemical reactions which take place between substances dissolved in river waters and those contained in salt water are no doubt complex; but that which is most significant in relation to possible precipitation of carbonate of lime depends upon the fact that organic matter may decompose sulphate of lime. Ac-

↑ ^1.00 ^1.01 ^1.02 ^1.03 ^1.04 ^1.05 ^1.06 ^1.07 ^1.08 ^1.09 ^1.10 ^1.11 Calculated from combinations given in the original publications.

↑ Analyses of Waters of the Yellowstone National Park,Bull. U. S. G. S., No. 47, p.24

[J._Geol._1(5)_p._509-a-1] 1.00 ^1.01 ^1.02 ^1.03 ^1.04 ^1.05 ^1.06 ^1.07 ^1.08 ^1.09 ^1.10 ^1.11 Calculated from combinations given in the original publications.

[2] Analyses of Waters of the Yellowstone National Park,Bull. U. S. G. S., No. 47, p.24

[note 1]

[1]