NOTES ON THE JAMAICA EARTHQUAKE 697 
of faults occur with trends parallel to the structural ridge while others 
are approximately at right angles to it. Large alluvial fans are found 
in indentations of the mountains at many points. 
TOPOGRAPHY 
In a general way the topography depends on the geologic structure, 
the mountainous areas corresponding with the upturned meta- 
Mountains 
Alluvial Fan 
A 
Qy> 
Sunk land “Sa 
eau 
Broken Catley 
Shlacement 
Fic. 1.—Sketch map illustrating location and surroundings of Kingston, Jamaica. 
morphic tracts and the broad plateaus bordering the mountains, 
especially to the west, coinciding with the younger and less disturbed 
Eocene beds. 
GENERAL SEISMIC CONDITIONS 
Seismic disturbances have been of frequent occurrence in the 
island of Jamaica since its settlement, but in general the shocks have 
been of slight intensity. In 1692, however, an earthquake of great 
severity took place, engulfing such parts of the city of Port Royal 
as were built upon the sand-spit across the harbor opposite the present 
