GEOLOGY AND PETROCHEMISTRY OF BASALTIC
assigned to the Late Mesozoic Maha Sarakham Formation. The Maha Sarakham Formation appears to rest unconformably over the underlying Khorat strata.(8) This rock unit consists of the lower, the middle and the upper rock salts, with 2 units of claystones intercalated. The age of this formation is inferrred as the uppermost Cretaceous.(8)