826 

 CONCLUSIONS. 



1. The parts of a reefcap formed during negative movements 

 may for two reasons disappear rapidly through erosion. Considerable 

 gaps in the development of a reefcap may, therefore, suggest long 

 and uninterrupted negative movements. 



2. In the case of geanticlines, raised above the sea over extensive 

 areas, observations along the coast cannot lead to conclusions about 

 the movements of the highest points, — also with a stable sealevel. 



3. The development of the geanticline causes reefs of the same 

 age to rise to various heights, which sometimes differ considerably. 



4. The highest |)arts of a reefcap are not on that score the 

 oldest, also when faulting is left out of consideration. 



5. At the toj) of a moving geanticline an island may disappear 

 and yet an island remains visible. 



6. Islands may tilt or only exhibit the semblance of doing so. 



