estuarine (estuarin)

[ Beds of red clay with marly concretions, which from their mineralogical resemblance to the overlying Pampean formation seemed to indicate that at an ancient period the Rio Plata had deposited an estuarine formation. Darwin , Geol. Observations, ii. 367. estuarine Fo il remains of land animals are, of course, rarely found except in lacustrine or estuarine deposits. Encyc. Brit., VII. 285. 2. Inhabiting or found in estuaries: as, "fluviatile or estuarine Cetacea," Huxley, Anat. Vert., p. 342.