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Region
- Georgia25
- MassachusettsStellwagen Bank National Marine Sanctuary20
- Stellwagen Bank National Marine Sanctuary (Mass.)20
- Appalachian Basin8
- Massachusetts8
- Long Island Sound (N.Y. and Conn.)7
- Stellwagen Bank7
- TennesseeShelby County6
- KansasWichita5
- Uinta Basin (Utah and Colo.)5
- CaliforniaSan Bernardino County4
- Massachusetts Bay (Mass.)4
- MassachusettsMassachusetts Bay4
- Mississippi4
- Wind River Basin (Wyo.)4
- WyomingWind River Basin4
- Afghanistan3
- New Jersey3
- United States3
- Utah3