342 
HUBBARD AND CRONEIS 
6-12 inches thick, and contains calcite veins. The shales are gray, 
green and indifferent tints, and also fossiliferous. There are 
many thin sandstones 1-3 ft. thick jointing into regular angular 
and cubical blocks. The shales weather rusty and the limestone 
weathers by solution leaving fossil cavities and red clay. 
113 feet. 
15. Thin bedded, greenish, gray blue, calcareous shales with 
thinner, stronger layers mainly of flinty sandstone but none of 
limestone. There are many fossiliferous horizons some of which 
weather out porous. Brachiopods, pelecypods and bryozoans 
occur. 44 feet. 
16. Thin bedded, bluish green, calcareous, and sandy shales 
with thin 2-4 in. sandstone layers every foot or two. These 
latter weather out in angular pieces like chert layers. There are 
many fossil zones and scattered fossils throughout the whole 
horizon. 18 feet. 
17. Thick bedded, massive, dark olive green, calcareous sand- 
stone in some places weathering shaly and in others like sand- 
stone. There are many horizons of broken and well-preserved 
fossils. Brachiopods occur 6 ft. from the top. The rock is richer 
in fossils than the Bays. 19 feet. 
The following analyses of the Sevier Shales will serve to indi- 
cate their approximate composition at the Narrows although the 
samples listed below were taken near Goodwins Ferry which is 
more than 20 miles up the New River. 
Analyses of the Sevier Shale^^ 
(J. H. Gibboney, Analyst) 
1 
2 
3 
Insoluble 
5.12 
41.48 
71.88 
Alumina 
Iron oxide 
2.92 
6.04 
8.56 
Lime 
51.16 
28.00 
8.54 
Calcium carbonate 
91.39 
40.00 
15.25 
Magnesia 
0.25 
0.30 
1.27 
Magnesium carbonate 
0.53 
0.64 
2.68 
1. Thin bedded, blue limestone, lower part of the Sevier. 
2. Calcareous shale from the lower horizons of the formation. 
3. Sandy shale from the Eden horizon of the Sevier Shale. 
Bassler, R. S., ‘‘Cement Resources of Virginia,” p. 200. 
