Used as combining form of L. fluvius river, as in fluvio-marine a., an epithet applied to deposits formed by river-currents at the bottom of the sea; also quasi-sb.; fluviometer, an instrument for measuring the rise and fall of rivers; fluvio-terrestrial a., pertaining to the land-surface of the globe and its rivers.
1848. Craig, Fluvio-marine.
1852. E. Forbes, in Wilson & Geikie, Mem., xiv. (1861), 505. Our grand ‘find,’ however, concerns the Eocenes, or rather the fluvio-marine portion of them. Ibid., 509. At length I have succeeded in examining bed after bed, the whole series of fluvio-marines; I might almost say without the break of an inch.
1863. Lyell, Antiq. Man, xi. (ed. 3), 204. If, therefore, the relative ages of the Picardy and Natchez alluvium were to be decided on the conchological data alone, the fluvio-marine bed of Abbeville might rank as a shade older than the loess of Natchez.
1865. Livingstone, Zambesi, iii. 70. The only fluviometer at Tette, or anywhere else on the river, was set up at our suggestion; and the first flood was at its greatest height of thirteen feet six inches on the 17th January, 1859.
1882. T. Gill in Proc. Biol. Soc., II. 30 (Cent. Dict.). The marine realms, however, are entirely independent of the fluvio-terrestrial, and their characteristic associations are determined by other factors.
