A, Winchell on Drift Materials in Michigan. 333 
(243), are filled with fragments of limestone, while the Marshall 
sandstone is struck at the depth of 50 feet on sec. 35, and at 30 
(208). a place one mile northeast of poner hs 
(209), 20,000 faaoe of lime have been manufactured in ten o 
twelve years. 
In the adjoining parts of Washtenaw county, several kilns 
proclaim the presence of extensive nests of limestone. en 
within the corporate limits of the city of Ann Arbor an exten- 
Sive eee has been quarried; and just beyond the limits, on 
the east, are the ruins of a dimeki In hich, many years ago, ex- 
Ct still another depos 
imilar masses of limestone occur in ae comnty one 
half mile scone a Jonesville Magis S.W.23N.W. } sec. 
21, Allen, oe EL; N.W.} u e. 21, eas, (289); SE i 
Square rods. One hundred rods north of here te ae are ee 
from 40 to 100 feet deep, without reaching any na k “2 
though thick beds of cemented sand and gravel are eecueae 
encoun tered. 
n the SW. 1 sec. 17, T. 7 N.R. 13 W, ouers county, (488) is 
‘the last occurrence that will be cited. Severa l slabs 8 or 4 feet 
long have been removed, and others remain, over an area of at 
st a square ro 
Pit is S quite evident that such masses of stratified limestone 
have not been rolled to the same extent as the quartzose and 
ae boulders which ipa te the most striking pape of 
“ northern drift” of the sam rays 38 as some gency 
by the fragments which =e 
oe ight be al as.  anone we outermost limits of @ 
mee continuous formation of Carbo 
abundant fossil remains contained i in ee fragments, however, 
1865. 
3, Vou. XL, No. pele atl 
