Développement stratigraphie lunaire

               The gravity anomaly map shows that there is negative

gravity anomaly in Sinus Iridum, while the surrounding is

 postive. There is postive gravity anomaly in the center of

Mare Imbrium, while the surrounding is negative.

An obvious gravity grad occurs along the line

between the two capes of Sinus Iridum.

  It shows that it is different in deep structure.

 L'anomalie de -200 mGA peut correspondre à une cavité de l'ordre du km3.

(EXTRAIT : http://phys.scichina.com:8083/sciGe//fileup/PDF/10yg2179.pdf )