Modes of emplacement of basalt terrains and an analysis of mare volcanism in the Orientale BasinThree distinctive types of basalt terrains can be recognized on earth on the basis of surface morphology: flood basalts, shield basalts, and plains basalts, each of which reflects unique styles of eruption and modes of emplacement. Two of these, flood basalts and plains basalts, appear to be important in the emplacement of mare basalts on the moon. Using surface features as identifying criteria, mare units in the Orientale Basin were examined and the following emplacement sequence was derived: (1) initial emplacement of impact melt in the basin center, (2) eruption of flood-type basalts in the basin center and approximately concurrent emplacement of plains type basalts in Lacus Veris, and (3) emplacement of plains type basalts in Lacus Autumni
Document ID
19770051954
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Greeley, R. (NASA Ames Research Center Space Sciences Div., Moffett Field; Santa Clara, University, Santa Clara, Calif., United States)