U.S.G.S. Open-File Report 95-595 - Chapter 5, Table 4.

Coal Geology of the Paleocene-Eocene Calvert Bluff Formation (Wilcox Group) and the Eocene Manning Formation (Jackson Group) in east-central Texas

Edited by P.D. Warwick and S.S. Crowley

U.S. Geological Survey Open-File Report 95-595

	As	Be	Cd	Cr	Hg	Mn	Ni	Pb	Se	U

Calvert Mine, A1 bed

Wtd. Avg.	1.5	1.3	0.17	15	0.17	148	7	8	9	2.6

Lignites of the Wilcox Group, East Central Texas

Geo. mean	2.5	1.7	0.52	18	0.12	92	11	7.6	4.3	2.1
No. of samples	81	98	69	113	65	99	91	64	96	82

Table 4. Comparison of wighted averages of the HAPs elements for samples from the A1 bed (Calvert mine) to mean levels reported by Tewalt (1986) for lignites of the Wilcox Group in east-central Texas. [All elemental values are in parts per million on a whole-coal basis; Wtd. Avg. = weighted average, No. of samples = number of samples; Geo. mean = geometric mean.]

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