Approximate locations of recent USGS fieldwork, April 2017
By Coastal and Marine Hazards and Resources Program
2017 (approx.)

Detailed Description
Approximate locations of some recent USGS coastal and offshore fieldwork in April of 2017. Dark blue areas outline the US Exclusive Economic Zone; purple areas show US Great Lakes waters. Map base: https://coastalmap.marine.usgs.gov.
Sources/Usage
Public Domain.