a. Geol. [attrib. use of Ger. flötz a layer, dialectal var. of fletz: see FLET.] (See quot. 1865.) Also in Comb., as floetz-trap.
1811. Pinkerton, Petral., I. 99. It belongs to the floetz-trap rocks, and constitutes, like wacken, the basis of amygdaloid.
1865. D. Page, Handbk. Geol. Terms, Flötz … a term applied by Werner to the Secondary strata, because they were flötz or flat-lying, compared with the Primary and Transition rocks.
