ki:i.| VIRGINIA. ' 319 
fork, and more extended search will no doubt reveal an ample supply 
|f such stone. 
(food railroad facilities, both for obtaining the fuel supply and for 
nipping the finished material, are found at this place. Coal could be 
ad from the north via the Baltimore and Ohio and Southern railroads, 
iid from the south over the Chesapeake and Ohio, the Valley Branch 
f the Baltimore and Ohio and the Southern railroads. By the same 
lilroads the finished product could be shipped to the east and to tide- 
ptter. 
Some miles east of Woodstock this same succession of rock is 
^countered along the eastern edge of Massanutten Mountain. The 
ement rocks here occur along a northeast-southwest line paralleling 
he belt along the western side of the mountain. Along this eastern 
ielt the argillaceous limestones have practically the same composition 
s those exposed near Woodstock. 
The following analysis is typical for this eastern belt: 
Analysis of typical limestone near Woodstock. 
lalcium carbonate ( CaC0 3 ) 74. 14 
lagnesium carbonate (MgC0 3 ) 1 . 00 
ilica (Si0 2 ) 16. 34 
ixides (R,0 3 ) 7. 49 
Vater (H 2 0) 2. 00 
Broadway and Timberville. — Cuts along the Southern Railroad in 
he vicinity of these two towns show the presence of small synclines 
f shales and argillaceous limestones very similar in texture and com- 
position to the same rocks found farther south about Harrisonburg. 
Harrisonburg and vicinity. — A syncline showing the Trenton argil- 
aceous limestones and Martinsburg shales occurs just west of Har- 
isonburg, and extends northeast and southwest for a distance of 
everal miles. The cement rock is especially well shown along the 
treet just west of the Southern Railroad depot, but exposures of the 
shales and of the underlying argillaceous rocks ma}^ be seen along the 
ountry roads going northwest, west, and southwest from the town. 
The thickness of the argillaceous limestones in this vicinity could not 
ie determined with certainty because of the lack of continuous expos- 
ires, but it probably does not fall short of 200 feet. Fossils indicating 
he Trenton age of the strata were not uncommon in the rocks shown 
ilong the western edge of the town. 
Pure limestone deposits are found east and southeast of Harrison- 
)urg in considerable quantity. Exposures of this rock may be seen 
n a cut on the Chesapeake and Western Railroad just east of the 
Tossing with the Southern Railroad. Here a pure gray limestone is 
found having a composition shown in analysis No. 1 of the table given 
below. 
