TABLE OF CONTENTS xxvii 



D. THE PYROSPHERE. 

 CHAPTER XXn. 



PAGE 



General Summary of Pyrospheric Activities 859 



Volcanic Activities ., 859 



Types of Volcanic Activities 859 



Subdivision with Reference to Location 859 



Explosive Eruption (860) ; Terrestrial Type (860) ; The Cinder 

 Cone; Material of the Cinder Cone; The Forms of the Cinder 

 Cones; Consolidation of Cinder Cone; Submarine Explosive 

 Eruptions 860-863 



Extra vasative Eruptions (865); Terrestrial Type; Fissure 

 Eruption; The Lava Dome; Acid Lava Domes; The Spine of 

 Pelee 865-870 



Composite Lava and Cinder Cones (870); Submarine Cones; 

 Mud Volcanoes 870-872 



Dissection of Volcanoes (874) ; Special Erosion Features 874-875 



Formation of the Lava 876 



Bibliography XXII 878 



E. THE CENTROSPHERE OR BARYSPHERE. 

 CHAPTER XXIII. 



DiASTROPHISM, OR THE MOVEMENTS TAKING PLACE WiTHIN THE EaRTH's 



Crust and Their Causes 880 



Classification of Earth Movements 880 



Classification of Seismic Disturbances (881); The Volcanic or 

 Pyroseismic Type of Earthquake; The Tectonic or Dislocation 

 (Baryseismic) Earthquake 882 



Surface Manifestations of Baryseismic Disturbances 883 



Rifting (883); Filling of the Fissures, Sandstone Dikes (884); 

 Craterlets (885); Fossil Examples (886); Slipping (887); 

 Block Movement (887); Disruptive Effects of Earthquakes 

 Effects of Earthquakes on Topography 



Submarine Earthquakes and Seaquakes (889); Airquakes (891); 

 Periodicity of Earthquakes (891) 889-891 



Movements due to Displacement or Migration of the Poles 

 (891); The Pendulation Theory (892); Determined Migrations 

 of the Poles 891-899 



Earth Movements and Geosynclines (900) ; Geosynclines, the Sites 

 of Orogenic Disturbance (902); Foreshortening of the Crust (903); 

 Height of the Folds (903); Character and Thickness of the De- 

 formed Mass 900-904 



Changes due to Extra-Telluric Influences 906 



Bibliography XXIII 908 



