IDEAL SECTION OF EARTH’S CRUSTERASAGESPERIODSSTRATABYCHOZOICMANQUATERNARYTERRACE, CHAMPLAIN, GLACIALCENOZOICMAMMALSTERTIARYPLIOCENE, MIOCENE, EOCENEMESOZOICBIRDSCRETACEOUSREPTILESJURASSICTRIASSICACROGENS AMPHIBIANSCARBONIFEROUSPERMIAN, CARBONIFEROUS, SUB-CARBONIFEROUSPALEOZOICFISHESDEVONIANCATSKILL, CHEMUNG, CORNIFEROUS, Etc.INVERTEBRATESSILURIANLOW HELDERBERG, NIAGARAORDOVICIANLORRAINE, TRENTON, CHAZYCAMBRIANPOTSDAM, ACADIAN, GEORGIAEOZOICALGONKIANKENESAW, HURONIAN, Etc.ARCHAEANLAURENTIAN, Etc.AZOIC ERAFRONTISPIECE.
FRONTISPIECE.