Table 3.

Semi-quantitative mineralogical profiles as determined by XRD for the sediment samples of Lake Cowan (C), Lake Dundas (D), Lake Lefroy (L), and Lake Yellowdine (Y).

	Crystalline	Amorphous	Quartz	Feldspara	Halite	Amphiboleb	Calcite	Dolomite	Gypsum	Kaolinite∗	Illite∗	Pyroxene∗	Silicates
C1	89	11	64	21	2	2	6	5	0	0	0	0	0
C2	84	16	48	39	3	1	3	6	0	0	0	0	0
C3	85	15	63	22	3	3	4	4	0	0	0	1	0
C4	85	15	50	33	6	3	4	3	0	0	0	0	1
D1	77	23	38	31	7	24	0	0	0	0	0	0	0
D2	85	15	50	33	6	8	0	0	3	0	0	0	0
D3	73	27	46	34	8	11	0	0	0	0	0	1	0
D4	78	22	39	28	5	10	0	0	18	0	0	0	0
D5	78	22	37	36	4	9	0	0	14	0	0	0	0
L1	80	20	58	24	6	4	0	0	2	2	4	0	0
L2	76	24	66	20	8	4	0	0	0	2	0	0	0
L3	84	16	79	9	6	2	0	0	2	2	0	0	0
L4	77	23	70	19	7	3	0	0	0	1	0	0	0
L5	68	32	58	23	9	5	0	0	3	2	0	0	0
L6	75	25	62	24	9	3	0	0	0	2	0	0	0
Y1	58	42	45	27	2	8	0	0	0	8	9	1	0
Y2	54	46	19	42	10	9	0	0	0	9	9	2	0
Y3	86	14	59	31	2	6	0	0	1	1	0	0	0
Y4	59	41	54	20	9	12	0	0	0	5	0	0	0
Y5	80	20	45	34	1	18	0	0	0	1	0	1	0
Y6	90	10	84	10	1	3	0	0	0	0	2	0	0
Y7	85	15	23	26	3	47	0	0	0	1	0	0	0
Y8	56	44	15	45	11	25	0	0	0	4	0	0	0

^aBest fit for feldspar (anorthite). ^bBest fit for amphibole (actinolite). ^∗Clay minerals should be viewed only qualitatively due to inaccurate estimations for quantification.