HiPOD: A Volcano of Mud or Lava?

This image shows a hill with a central crater. Such features have been interpreted as both mud volcanoes (really a sedimentary structure) and as actual volcanoes (the erupting lava kind). They occur on the floor of Valles Marineris below a closed topographic contour that could have held a lake, and the compaction of wet sediments may have created mud volcanoes.

https://uahirise.org/hipod/ESP_054649_1665
NASA/JPL-Caltech/UArizona