Stacks of tree cookies
Detailed Description
Tree cookies, cross sections of dead trees, used to study the history of a tree and its environment.
Sources/Usage
Public Domain.
NPS
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.
