The lava plains northwest of Ascraeus Mons are notable for having two dark collapse pits photographed by the HiRISE camera on the Mars Reconnaissance Orbiter (MRO) in November 2010 (pictured in gallery below).
As chairas de lava do noroeste do Ascraeus Mons son rechamantes polo feito de ter dúas grandes fosas fotografadas pola HiRise da Mars Reconnaissance Orbiter (MRO) en novembro do 2010 (imaxe na galería de imaxes de abaixo).