Second Geological Survey of Pennsylvania.
Report of Progress.
F³.
1888–1889.
Report on the Geology of the
Four Counties
Union, Snyder, Mifflin, and Juniata
with descriptions.
of the
Clinton fossil ore mines, Marcellus carbonate iron
ore mines, Oriskany glass sand mines, and Lewis-
town limestone quarries.
Illustrated by
A colored geological map of Mifflin and Juniata counties.
By E. V. d’Invilliers
Harrisburg:
Published by the Board of Commissioners
for the Second Geological Survey.
1891.
