eo 634 General Notes. - 
_ tor in many fissures of the Peñon rock thin veins are found compe 
_ Ofcalcareous matter in some cases, of siliceous in others, Bes! 
w#ite and lacustrine shells, It is in this bed that human remains, 
and no others, have been found. The thickness of this bed is 
not yet known, as it has only been opened toa depth of 1.2™ 
The bed is covered by a thin layer of a limestone richer in quartz, 
a true ribbon, dividing the adjacent formations. 
Not a single modern object has been found in this bed, nor in 
another similar one situated to the south of the mountain, more 
than a meter thick, and resting on a lacustrine and turfy formation. 
Two miles northwest of Peñon there is another bed of sili- 
ceous limestone at the foot of the mountain chain of Guadalupe, 
and stretching over a great length, This limestone is in compo- 
sition, appearance and position, identical with that of Peñon, con- 
taining roots transformed into menillite, and in its upper part 
fragments of old pottery. What is most important in this for- 
mation zs the existence of elephant bones sealed in the hardest bed, 
Like that of Peñon. These bones have been taken out on many 
occasions, I have done it myself in the presence of the pro- 
fessors of the National Museum. ; 
The distance from this bed to that of Peñon is so inconsider- 
~ 
ra . é . ee E 
SO as to occupy a position different from its primitive one, ale 
Peñon having for an enormous number of years been surroun 
man 
The hy- 
ct in the 
