320 E. M. KINDLE 
The limits of the three subdivisions or series of the Paleozoic pro- 
posed by Brooks, which are shown in the preceding table, correspond 
to those of the Carboniferous, Devonian, and Silurian rocks of the 
region, so far as they 
were recognized at that 
time. 
Our present knowl- 
edge of the section is too 
incomplete to make any 
definite statements con- 
cerning the contact rela- 
tions="ol the 4sew.etall 
icant divisions of the column. 
vestk || While it is probable 
““* EF! that unconformities exist 
within the Paleozoic, 
evidence of them has not 
been observed by the 
writer. 
Brooks observed what 
he considered evidence of 
unconformity at the base 
of the Devonian at Long 
Island (13)? and Vallenar 
Bay (12) At maybe 
stated, however, that at~ 
neither of these localities 
is the age of the ‘older 
beds” known. The evi- 
dence of unconformity 
“ES 
pred ewrtie® /QAF yao” consequently rests on the 
ene Losey character of the contact 
Jaa gere ; between the Devonian 
and the older beds. This relationship, as observed by the writer 
at Long Island, appears to be open to another possible interpretation 
than that of unconformity. On the north side of Long Island the 
t Numbers refer to collecting stations on map. Professional Paper No.1, U.S. 
Geological Survey, 1902, p. 21. 
