Imágenes de páginas
PDF
EPUB
[merged small][graphic][graphic][merged small][merged small][graphic][subsumed][merged small][merged small][merged small][merged small][merged small][merged small]
[blocks in formation]

UPPER HELDERBERG, HAMILTON, PORTAGE AND CHEMUNG GROUPS.

BY JAMES HALL,

STATE GEOLOGIST.

ALBANY, N. Y.:
CHARLES VAN BENTHUYSEN & SONS.

1879.

« AnteriorContinuar »