270 W. H. Ticenhofel and W. H. Conine— The 



tended by the work of the waves. This is known as the 

 "reef^ by the people of the island and by the sailors of 

 the Gulf. Its presence is a menace to navigation and it 

 renders many parts of the coast of Anticosti inaccessible 

 from the sea except to the smallest of boats. Its width 

 varies from nothing to about three miles, the greatest 

 width being on the south side at the mouth of Dauphine 

 River, but it is almost every^vhere present to some degree 

 except in those bays which have barrier beaches about 

 their heads as is the case at the mouths of Jupiter River, 

 Salmon River, Fox River, etc. On the south side there 

 are not many places where the reef does not have a 

 width of at least an eighth of a mile, and a quarter- to a 

 half-mile width is an extremely common occurrence. On 

 the north side the reef is less marked than on the south, 

 but even there it is commonly from a sixteenth to an 

 eighth of a mile wide. 



The reef shows little other than barnacle- and seaweed- 

 covered rocks. Pebbles are generally wanting except at 

 the shore, where they are apt to be in quantity unless the 

 rock of the coast is composed of material from which they 

 could not readily be derived. Were the shells and sea- 

 weeds removed from the reef, there would be little or 

 nothing present to show that it is of wave-cut origin; 

 morever, it is probable that if the waves should cut en- 

 tirely across the island so as to develop a reef over the 

 entire extent of its present area, there would be no con- 

 glomerate to show the wave-cut origin, and, were the reef 

 then submerged, there would be no basement conglomer- 

 ate to mark the unconformity, but sands and muds would 

 rest directly across the truncated edges of the limestones, 

 shales, and sandstones which constitute the rocks of the 

 island. 



The terraces above sea-level.— The terraces above sea- 

 level are tabulated in the list which follows. It is proba- 

 ble that the elevations which are given contain some error 

 for all terraces above the eighth, this being a necessary 

 consequence of the method of measurement and the con- 

 ditions under which measurements were made. Another 

 factor introducing an error is the fact that every terrace 

 is covered with vegetable mould and peat of which the 

 thickness was not always determinable. So far as possi- 

 ble, however, an estimate has been made and a deduction 

 allowed therefor. 



