The works of the present direction were a direct consequence of the previous section, on the basis of which V.G. Khlopin came to the concept of continuous gas exchange between inner and outer gas atmospheres, about the role of natural waters, in a particular case - in the exchange of noble gases (excluding helium) between outer air and underground atmospheres. In accordance with these ideas in underground gas atmospheres there is a gradual enrichment of argon, krypton and xenon, - depletion of neon in relation to their content in the air. Relation </div>
in underground atmospheres is greater than in air. It has been found that gases dissolved in the lower layers of deep natural reservoirs are sharply enriched with heavy noble gases.