Verifiable and repairable preserved biolandfill for biological carbon sequestration and compositions for biological carbon preservation

A dry tomb biolandfill that preserves sequestered biomass comprising:

• a) A biomass salt composite with a water activity less than about 0.85 enveloped with top and bottom seal structures forming a dry tomb structure, said biomass salt composite having an average salt content of at least about 0.0001 wt. % of the dry weight of the biomass and less than about 75 wt. % of the dry weight of the biomass, and said top and bottom seal structures containing at least one water transport barrier.