reef. Over the surface are 
the customary tide-pools, 
though but few of them 
have any considerable depth. 
These pools lie mostly along 
lines parallel with the main 
axis of the reef. Much of 
the surface is covered with 
light green seaweeds. 
The rock of the reef is a 
hard sandstone of a light 
brown color and contains 
many fossil shells. 
The Traigäo reef, perhaps, 
more than any other one ex- 
amined shows the effects of 
the wear and tear of the 
surf. Inside the reef there 
are many blocks buried in 
the sands, apparently broken 
from the outer face and 
thrown across by the waves ; 
the outer edge is decidedly 
Serrate, seldom presenting a 
bold face to the sea. Here 
and there the waves have 
opened beneath the reef great 
caverns in which they can be 
heard to swash back and 
forth. Sometimes these 
waves can be felt to jar the 
whole reef surface over an 
area of several hundred 
square metres. 
For details of other charac- 
teristics of this reef reference 
is made to the description of 
that of the Mamanguape. 
The Mamanguape stone 
reef. — The Mamanguape 
reef is one of the largest and 
most impressive of the stone 
reefs of Brazil. It is 
described as a separate 
but properly speaking it is 
Continuous with the Traição 
reef to the north of it, and 
here 
reef, 
p 
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Dy 
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о ma В 
МАР | | 
MAMANGUAPE зо TRAICAO 
STONE REEF 
ar 
ESTADO DE PARAHYRA DO NORTE 
IL 
HAROLD HAVENS Ч 
C EGILMAN 
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25 
Fra. 19. 
Sune їз ым ww | 
