Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Generalized Middle Paleozoic stratigraphy for the New York City region; not that Late Paleozoic rocks are "missing" (after Drake et al., 1996, Fisher et al., 1996, and Rogers 1995).
Public Domain.
