Several have nested or cross-layered calderas and pit craters ( 29 in total ), many of which push into the flank of the volcanoes.
32.
The pit crater they discovered is in the form of a skylight above a lava tube, on the slope of the Pavonis Mons volcano.
33.
The migration of the magma exploits or opens up fractures in the subsurface, causing a crack or pit crater chain to form at the surface.
34.
Crater Rings are adjacent, symmetrical volcanic pit craters and a National Natural Landmark located in the Nelson Snake River Birds of Prey National Conservation Area.
35.
The pit crater is only the second one discovered on Pavonis Mons, and is estimated to be approximately 190 meters wide and 115 meters deep.
36.
"' Halemaumau Crater "'is a pit crater located within the much larger Pele, goddess of fire and volcanoes, according to the traditions of Hawaiian mythology.
37.
Partially collapsed lava tubes are visible as chains of pit craters, and broad lava fans formed by lava emerging from intact, subsurface tubes are also common.
38.
Knowledge of the locations and formation mechanisms of pit craters and fossae is important for the future colonization of Mars because they may be reservoirs of water.
39.
The expedition also noted sulfur mounds near the caldera and pit crater walls; There is also an iron-manganese crust on a small off-axis seamount that adjoins Green Seamount,
40.
Located at the center of both a sheet flows, and pit craters up to deep; its geology is further complicated by its intersection with several smaller seamounts surrounding it.
