USGS, White Sands footprints
www.usgs.gov
External article citations become normalized source records automatically with article provenance.
Inspect the sources, claims, contrary evidence, and revisions behind a conclusion.www.usgs.gov
www.ncei.noaa.gov
www.ncei.noaa.gov
www.brown.edu
www.ces.fau.edu
www.geolsoc.org.uk
www.nps.gov
whc.unesco.org
whc.unesco.org