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Marine Geology & Geophysics
The National Geophysical Data Center provides scientific stewardship, products and services for sea floor and lakebed data, including geophysics (gravity, magnetics, seismic reflection, bathymetry), and data derived from sediment and rock samples.
NGDC compiles coastal and global digital elevation models, high-resolution models for tsunami inundation studies, provides stewardship for NOS data supporting charts and navigation, and is the US national long-term archive for MGG data.
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