Editing 4 Vesta (section)

===Features associated with volatiles===
Pitted terrain has been observed in four craters on Vesta: Marcia, Cornelia, Numisia and Licinia.<ref name="Denevi2012"/> The formation of the pitted terrain is proposed to be degassing of impact-heated volatile-bearing material. Along with the pitted terrain, curvilinear gullies are found in Marcia and Cornelia craters. The curvilinear gullies end in lobate deposits, which are sometimes covered by pitted terrain, and are proposed to form by the transient flow of liquid water after buried deposits of ice were melted by the heat of the impacts.<ref name="Scully2014"/> Hydrated materials have also been detected, many of which are associated with areas of dark material.<ref name="DeSanctis2012b"/> Consequently, dark material is thought to be largely composed of carbonaceous chondrite, which was deposited on the surface by impacts. Carbonaceous chondrites are comparatively rich in mineralogically bound OH.<ref name="Reddy2012"/>