| 释义 |
migma Geol.|ˈmɪgmə|
[a. Gr. µίγµα mixture, f. µ(ε)ιγνύναι to mix.]
A mixture of solid and molten rock.
1943Proc. Geol. Assoc. LIV. 73 The migma, if the amount of its liquid portion became great enough, would flow and could intrude itself into its surroundings in typical eruptive or intrusive fashion. 1952T. F. W. Barth Theoret. Petrol. iv. xiii. 364 In the root parts of the folded mountains..a migma is formed that corresponds to the magma of the higher levels. 1974Encycl. Brit. Micropædia VI. 880/1 Between these extremes is a concept of a pore fluid, or migma, generated by the differential melting or partial fusion of the root portions of mountains. |