V.—Wayside Notes in Travels over Europe.—The Great Northern Drift

Extract

The overland route to Russia viâ Konigsberg or Warsaw—now accomplished with comparative ease—reveals some instructive facts connected with one of the most recent yet extreme of climatal changes which has contributed to mould and fashion so large a portion of the surface geology of Northern Europe. I refer to the “Great Ice Age,” or “Glacial Period,” when a frozen sea probably covered the extensive plains now known as Russian Poland.