Rupes Tenuis
... that Rupes Tenuis , the Martian north polar scarp, may have been in retreat since the Late Amazonian period?
... that <b id="mwAXc"><a href="./Rupes_Tenuis" id="mwAXg" rel="mw:WikiLink" title="Rupes Tenuis">Rupes Tenuis</a></b> <i id="mwAXk">(pictured)</i>, the <a href="./Mars" id="mwAXo" rel="mw:WikiLink" title="Mars">Martian</a> north polar scarp, may have been in retreat since the Late <a href="./Amazonian_(Mars)" id="mwAXs" rel="mw:WikiLink" title="Amazonian (Mars)">Amazonian period</a>?