IN STRATA OF RECENT FORMATION. 105 
liere is, however, no reason to consider these 
nes to be of high antiquity, as the rock in 
occur is of very recent formation, 
n ^®*^^Posed of agglutinated fragments of 
hells and corals which inhabit the adjacent 
ater Such kind of stone is frequently formed 
t a few years from sand-banks composed of 
s'lmlar materials, on the shores of tropical seas, 
humnoT* ““de of 
cZ2 ■ 
caverns, sometimes inclosed in stalactite ol 
other times in beds of earthy materials, wiiicl, 
are interspersed with bones of extinct species of 
qtiadn^ds. These cases may likewis^ be e^ 
p ained by the common practice of mankind in 
inaiiv Ca accidental circumstance that 
many caverns contained the bones of extinct 
pecies of other animals, dispersed through the 
aame soil m which human bodies may Jt any 
iilf 'T >'» 
were introd„cl“ 
llsavalr*! “'habited 
>y savage tribes, who. for convenience of occu- 
: Ch'i of soil 
buried s r!!- l“''“^a''a®aors may have been 
sional 1 ^ disturbances will explain the occa- 
tons ^*'^Sinents of human skele- 
t le bones of modern quadrupeds, with 
