Its main feature is a NE-SW-oriented rift-like fracture set connecting two summit calderas. There is also a structure which links the northern caldera and ridge system to Idem Kuva corona located NW of Gula Mons. Radially spreadinglava flows which have digitate and broad sheet-like forms extend from the summit, including radar-dark flows which overlay several olderlava deposits. Radial and circumferential fractures are present on the flanks.