We usually know nothing of the geographical varieties of the Pleistocene and Pliocene species, least of all, those successive changes of form which they must have undergone in the Preglacial epoch between the Upper Miocene and Pleistocene eras.
"The Antiquity of Man"
Charles Lyell
Within their primeval circles, the earth remains radiant and young as in that Preglacial time whereof some transmitted memory may have created the hundred traditions of an Age of Gold.
"Two Years in the French West Indies"
Lafcadio Hearn
In many cases lakes are due to more than one cause, as where Preglacial valleys have both been basined by the ice and blockaded by its moraines.
"The Elements of Geology"
William Harmon Norton