Pl. -strata. [mod.L., neut. sing. of pa. pple. of L. supersternĕre to spread over, f. super- SUPER- 2 + sternĕre to lay down, strew.] A stratum or layer deposited over or upon something; an overlying or superficial stratum.
1806. Amer. State Papers, Ind. Affairs (1832), I. 737. The superstratum is of a blackish brown color, upon a yellow basis.
1823. Byron, Juan, IX. xxxvii. First out of, and then back again to chaos, The superstratum which will overlay us.
1840. Lyell, Princ. Geol., II. vii. (ed. 6), II. 79. The superstrata were precipitated into hollows prepared for them.
