a. Sometimes erron. strata-. [Formed as prec.: see -ICAL.] Pertaining to stratigraphy.
1817. W. Smith (title), Stratigraphical System of Organized Fossils.
1849. Murchison, Siluria, iii. (1859), 43. The rock unquestionably occupies the same stratigraphical position as the Lingula Flags of Wales.
1857. Portlock, in Q. Jrnl. Geol. Soc., XIII. p. xci. The stratigraphical distribution of the fossils enumerated.
1869. Huxley, in Sci. Opin., 28 April, 486/1. What is termed stratigraphical geology is neither more nor less than the anatomy of the earth.
1883. Hulke, in Q. Jrnl. Geol. Soc., XXXIX. Proc. 64. The advantages likely to accrue from such international uniformity of stratigraphical terms.
1892. Lapworth, in Nature, 18 Aug., 372/2. What is known as stratigraphical geology, or the study of the geological formations.
Hence Stratigraphically adv., in stratigraphical respects; with reference to stratigraphy.
1831. A. Sedgwick, in Proc. Geol. Soc., I. 274. He [sc. W. Smith] made large collections of fossils; and the moment an opportunity presented itself he arranged them all stratigraphically.
1857. H. Miller, Test. Rocks, x. 418. Both stratigraphically and palæontologically the place in the scale of the Niagara graveyard can be definitely determined.
