Figure 1. Sampling sites along the coast of the Netherlands.
Sites corresponding to the Renodunal and Wadden geological districts are marked with black and white squares, respectively.
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.