22 



PRINCIPLES OF STRATIGRAPHY 



lithosphere since the formation of the Archsean rocks. The follow- 

 ing table gives the larger divisions of this evolutionary history : 



Table of the Divisions of Geological Time. 



Psychozoic or Quaternary time. 



Cenozoic or Tertiary time . 



Mesozoic or Secondary time . 



Palaeozoic or Transition time. 



Proterozoic (Eozoic) or Primary time (in 

 part) Algonkian 



Azoic (Archaeozoic) or Primary time (in part) 

 Archaean 



Recent or Holocenic 



Pleistocenic 



Pliocenic 



Miocenic 



Oligocenic 



Eocenic 



Cretacic 



Comanchic 



Jurassic 



Triassic 



Permic 



Carbonic 



Mississippic 



Devonic 



Siluric 



Ordovicic 



Cambric 



Keweenawic 



Huronic 



Keewatic 

 Laurentic 



BIBLIOGRAPHY I. 



ARRHENIUS, SVANTE. 1900. Geol. Foren. Forhandl. Vol. XXII. 



BARUS, CARL. 1891. The Contraction of Molten Rock. American 

 Journal of Science, 3rd ser., Vol. XLII, pp. 498-499. 



BARUS, CARL. 1892. The Relation of Melting to Pressure in Case of 

 Igneous Rock Fusion. Ibid. Vol. XLIII, pp. 56-57. 



CHAMBERLIN, THOMAS C, and SALISBURY, ROLLIN D. 1906. 

 Geology, Vol. I. 



CROSBY, WILLIAM OTIS. 1892. Dynamical Geology and Petrog- 

 raphy. 



DAVIS, WILLIAM MORRIS. 1899. Elementary Meteorology. 



FULLER, MYRON L, 1906. Water Supply and Irrigation Paper, 

 No. 160. 



GREGORY, J. W. 191 1. The Terms Denudation, Erosion, Corrosion, 

 and Corrasion. Geographical Magazine, Feb. 191 1, pp. 189-195. 



GtJNTHER, SIEGMUND. 1891. Lehrbuch der Physicalischen Geog- 

 raphic. Stuttgart. 



