Central Connecticut in the Geologic Past.* 



"The hills are shadows, and they flow 

 From form to form and nothing stands; 



They melt like mists, the solid lands, 



Like clouds they shape themselves and go." 



Tennyson. 



OUTLINE. 



Page 



Introduction . . . ^ 

 Plan of the paper . ... 



Geologic history expressed by structure sections . . .8 



The forces of geologic change . . . . 10 



The measure of geologic time ... .12 



Description of Central Connecticut . . . .14 



A part of the Appalachian province , 

 The surface features .... 

 The rock structure . . .19 



Structure Sections of Successive Geologic Periods 

 The present geologic time 

 Connecticut during the Glacial period 



The close of the Tertiary period . 23 



In the Cretaceous period . 24 



The block mountains of the early Jurassic . . 26 



Close of the Triassic Sedimentation . .28 



Beginning of the Triassic Sedimentation . . 32 



Close of the Appalachian Revolution 



The Panorama of Geologic Time . . 34 



The Meaning of the Shifting Scenes . . . . .40 



*This paper, in its original form, was read before the Wyoming Historical and Geo- 

 logical Society, April 28, 1911, and was published in their Proceedings and Collections, 

 Vol. xii, pp. 25-54. It is now reprinted, with alterations and additions, by permission of 

 the Wyoming Historical and Geological Society. 



