(meteorobs) OT...Cave Skylights Spotted on Mars

[drobnock]

I some times feel that the name NASA has in a moniker "never a straight
answer".

It is possible that the geological areas photographed and identified as
"skylights" is a karst area -- limestone layers -- that have been
transformed by water and exposing sink holes and pits several metres
deep.

Yes, NASA caught your attention with the term sky lights.

Those not firmiliar with a sink hole may want to visit:
http://www.geology.enr.state.nc.us/Geologic_hazards_sink_holes_karst/sinkholes.htm

George John Drobnock