ultrabasic

English

Etymology

From ultra- +‎ basic.

Adjective

ultrabasic (not comparable)

  1. (geology) ultramafic
    • 1980, A. W. Bally, Dynamics of Plate Interiors, →ISBN, page 49:
      In the process of basification, the top layer of the crust becomes basic, while the lower becomes ultrabasic acquiring the density of the mantle or an even greater density

Noun

ultrabasic (plural ultrabasics)

  1. (geology) ultramafic

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