288 
CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1902. [bull. 213. 
the coal above. The Velpen coal is abundantly exposed around 
Velpen, at Pikeville, northeast and south of Selvin, and southwest 
of Heilman, and is probably the coal occurring just east of Grass. 
Around Selvin it is reported in a number of places to be underlain at 
a distance of only a few feet by 3 feet of coal of poor quality. At no 
place was this underlying coal seen. One or two thin bands of impure 
coal are reported to come between the two in places. Among the 
measurements taken are the following : Lynch opening, northeast of 
Velpen, 18 inches; near Velpen, 30 inches; llagmyer opening, east of 
Stendal, 12 inches; Byers opening, north of Selvin, 18 inches, and 
Irwin opening, east of Grass, 20 inches. 
Rock Greek coal.— This coal underlies the Velpen bed at an inter- 
val of from 40 to 50 feet. It is usually of a better thickness than 
the latter, often running up to 3 feet. It frequently, however, splits 
into two benches, usually not more than a foot apart and often sepa- 
rated by a mere film, though it is supposed to be in places split into 
benches 5 or 6 feet apart. The thickness of the benches and of the 
intervening partings are given in the table on page 290. Its outcrop 
extends from near White Sulphur Springs, north of Velpen, to near 
Ohrisney, passing near Velpen, Pikeville, Zoar, and Holland. It 
shows as a double coal, with a parting of variable thickness at numer- 
ous points, notably near Velpen, Pikeville, Zoar, west of Holland, 
and throughout Warrick and Spencer continues generally. 
Holland coal. — This coal normally lies from 70 to 90 feet below the 
Rock Creek bed, and although it is often thin or wanting, it some- 
times acquires a workable thickness. The outcrop of the coal or the 
cherty limestone associated with it has been traced from a point some 
3 or 4 miles north of Duff southward to Gentryville and vicinity and 
eastward to Dale. The limestone outcrops abundantly southeast of 
Holland, but the coal, if there, frequently fails to show in outcrop. 
The thickness of the coal at various points is shown in the following 
table. Where there are partings the figures given are for the com- 
bined thickness of the benches. 
Coal thicknesses, Millersburg, Petersburg, Survant, and Holland coals. 
MILLERSBURG COAL. 
Location. 
Whitlock mine, west of Petersburg... 
Alexander opening, south of Peters 
burg 
Carr opening, southwest of Rumble . . 
Dongola clay and coal bank 
Oakland City quarry 
Bird shaft, Francisco 
Tevault opening, south of Spurgeon . . 
Daubs opening, east of Lynnville 
Thick- 
ness. 
Inches. 
48 
56 
50 
30 
25 
30 
Location. 
McGladden opening, southeast of 
Lynnville 
Orths opening, west of Eby 
Thompson mine, east of Elberfeld 
Grander opening, Millersburg 
Edward opening, northeast of Chan- 
dler 
Exposure near Ne wburg 
Thick- 
Inches. 
36 
39 
63 
72 
58 
18 
