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.
Streambed-sediment sample collection methods used at Leon Creek in San Antonio, Texas, 2012–14. Hydrologic technician processing a surficial streambed-sediment sample.
USGS SIR 2016–5039
