5 i6 



H. F. CLELAND 



is about 325 feet long and 33 feet wide. To the west of this is 

 an excavation from which the material in the creek bed was 

 derived. This cavity is some 320 feet in length from east to 

 west, and about 30 feet lower than the original surface. 



The history of the phenomena is as follows: During 1895 a 

 spring, called a "geyser" in this vicinity, broke out with con- 

 siderable force. The water contained a great deal of sediment, 

 (finely divided blue clay) which was at first "as thick as pea 



/^//M'V'/'/K 



Topographic map of Greylock with position of the three large landslides. 



soup" and contained large quantities of decayed roots. The 

 muddy water was of sufficient volume to so contaminate the 

 water of Beaver Creek as to render it unfit for the use of the 

 Windsor Print Works. 



The land above the spring gradually sank as the bank was 

 undermined and with each subsidence of the surface the spring 

 moved back toward the high bank to the west. Before the 

 sinking occurred growing trees sank beneath the surface, in an 

 upright position, and poles could be driven down several feet 

 with little effort. During a flood in March, 1901, the bridge 

 pier was tilted, the dam was raised, and the clay appeared in the 

 creek bed. This land continued to rise for several months. 



The explanation is as follows : The sediment in the water 

 was produced by the breaking and fracturing of the clay bank,. 



