ABSTRACTS OF I'APERS 



91 



that so well described liy Doctor Clarke. In the Adirondacks, beautifully 

 stratified (Jrenville rocks, some liuiidreds of feet thick, dip westward at 55° 

 and rest against Chinniey Moun-tain, consisting of syenite which rises nearly 

 3,000 feet above the surrounding country. On one summit of the mountain a 

 block of Grenville one-(iuarter mile long has broken away fi'om the main mass, 

 leaving a rift 200 to 300 feet wide and 250 feet deep, with very steep walls. 

 The rifted block dips 20° northeastward. It broke away along a joint plane, 

 due to solution of underlying calcareous strata, in a manner similar to that 

 explained by Doctor Clarlie. 



EVIDENCE OF RBCEST HUHSIDENCE ON THE COAXT OF }LUNE 



BY CHARLES A. DAVIS 



{Abstract) 



A few weeks during the summer of 1014 were spent on the shores of Dam- 

 ariscotta River and the adjoining bays and inlets, during which opportunities 

 were found to study a rocky coastline for evidences of recent subsidence. 



Three general classes of such evidence were found. 



(1) Dead anil <lying trees and other fresh-water plants 

 at and below the high tide level on all kinds of 

 shores. 



(2) Forest beds containing stumps of trees outside 

 the present shoreline down to and below tide 

 level. 



{?>) Salt marshes with fresh-water beds of peat be- 

 low them. 



A. Botanical. 



B. Physiographic. .< 



C. Historic < 



' (1) The present form of the rock coast of the region. 

 (2) The general existence of ancient weathering on 

 the rocks extending from above high tide level 

 to below low water. 



(1) Existence of walls, wliarves, and other structures 

 below high tide level. 



(2) Closing of springs formerly used l)y settlers by 

 sea-deposited debris. 



The |);i|)ci- i-ecorded sonio of tlie more iiii[)(iiiaiil fiuis disc-oxci-iMl and 

 described tlicii' occiiiTcnce. , 



Presented in abstract extemporaneoiisl}'. 



Discussion 



Mr. ,ToHN T/. PiTcii : Several of the trees and stumps which were shown as 

 having been invaded Ity salt water occur on relatively steep slopes, covered, 

 according to the accounl. by (ill. I slmuld like to .isk wbetlier creep has been 

 eliminated as .i cnnsc of (he ;ipparenl rise of the water level. Conditions seem 

 iMvondile for it here. and. moreover, sevenil of the trees show .-i down bill 

 juclination near the bast>, which is a very cliaracleristi<- result of creep. A 



