<b><a href="https://en.wikipedia.org/wiki/1790_Footprints" class="extiw" title="w:1790 Footprints">1790 Footprints</a></b> — footprints in solidified ash from the 1790 eruption of Kilauea. 
<ul><li>From National Park Service web site, section  on Hawaii Volcanoes National Park.</li></ul>
National Park Service
Unknown date<div style="display: none;">Unknown date</div>
<a rel="nofollow" class="external free" href="http://www.nps.gov/havo/historyculture/footprints.htm">http://www.nps.gov/havo/historyculture/footprints.htm</a>