ppl. a. (UN-1 8.)
[1775. Ash.]
1802. Playfair, Illustr. Hutton. Th., 57. The unstratified minerals exist … in veins intersecting the stratified.
1873. Dawson, Earth & Man, xi. 269. Boulder clay … is usually destitute of any lamination or subordinate stratification; whence it is often called Unstratified Drift.
