Climate and Time in Their Geological RelationsNote 145 — Chapter XVII · FORMER GLACIAL EPOCHS.—REASON OF THE IMPERFECTION OF GEOLOGICAL RECORDS IN REFERENCE TO THEM.Reading edition“Short American Tramp,” pp. 239−241.◇Copy noteReturn to CHAPTER XVII. FORMER GLACIAL EPOCHS.—REASON OF THE IMPERFECTION OF GEOLOGICAL RECORDS IN REFERENCE TO THEM.