42 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



logic time, the emanations seem possibly sufficient to have given 

 rise to the entire atmosphere and ocean without necessarily invok- 

 ing a primal or cosmic source. But the enrichment of the 

 atmosphere gives the rain increased power to destroy the rocks. 

 The ocean probably has increased in volume through the ages, 

 fed by steam exhaled from the underworld, and has thereby 

 gained in power to invade the rain-eroded lands. This result, 

 however, has been counteracted by a more than corresponding 

 increase in the volume of the ocean basins. So it is seen that 

 the upward struggles of the inner earth, by increasing the air and 

 water at the surface, have added in the end to the power of /the 

 opposing agents and insured the more speedy ruin of those struc- 

 tures which the earth-born forces build. 



Thus the surface of the earth is the battle ground of forces 

 born of the sun and working through the earth's gaseous and 

 liquid mantles against those other forces born of the earth's 

 interior which mold the crust with giant power. Geologic history 

 is the record of this never-ending and ever-shifting warfare be- 

 tween the powers of light and the powers of darkness. Progress 

 is born of conflict not only in the human world, but in the mate- 

 rial world as well. 



A review of the geologic record carries us back to the tangled 

 rocks of the Archeozoic, and gives knowledge of an aeon when the 

 Titans of the inner earth burst their bonds. Mountains spread 

 across the continents and reached above the clouds. Igneous 

 activity seems to have been for a time dominant in the outer 

 crust of the earth. The older structures were destroyed and 

 world-wide metamorphism of the rocks prevailed. Great masses 

 of older sediments, now profoundly mashed and crystallized, show 

 that the early Archeozoic does not record the beginning of the 

 earth, but that a still earlier rule of the external forces was over- 

 thrown. The reign of Uranus had come to an end and Cronus 

 sat upon the throne. For a period the earth-born Titans held their 

 riotous sway, but their power decayed, while that of the children 

 of Cronus increased, until in the sediments of the Lower Huron- 

 ian is shown an establishment of the orderly processes of the ex- 

 ternal world. But again the Titans rose in their might, and 

 once more over wide continents they shattered the crust and 

 raised high mountain domes; yet in so doing they spent their 



