xNNx,Detailed Type 1,,,,,,xxNx,Detailed Type 2,,,,,,xxxN,Detailed Type 3
90,Partially subterranean vault,,,,,,,,,,,,,5, with ends that extend higher than the main tomb roof
91,Partially subterranean vault with barrel vault just visible,,,,,,,,,,,,,0,
92,Partially subterranean vault with barrel vault roof and vertical sides,,,,,,,,,,,,,,
93,Partially subterranean vault with gable roof and vertical sides,,,,,,,,,,,,,,