!KEL. | 
MICHIGAN. 
191 
Russell describes this Limestone as follow 
The limestone of the Dundee formation is also quarried 2 miles northeast of 
Dundee, Monroe County, where four layers of limestone are exposed, the composi- 
ion of which is shown below: 
Analyses of Dundee limestone from the u Christiancy quarry" near Dundee. a 
[Analyses 1, ;>, 5, and 6 by G. A. Kirschmeier, and analyses 2 and 1 by K. .1. Sundstrom.] 
ilica (SiO,) 
jime carbonate (CaC0 3 ) 
^agnesium carbonate (MgC< > 3 ) 
iron oxide (Fe 2 3 ) 
Uimiina ( A1 2 3 ) 
Sulphur (S) 
Organic matter 
difference 
Total. 
Number of analysis and designation of bed. 
1(A). 
0.48 
90.80 
6.87 
.16 
1.69 
.00 
100. 00 
2(A). 
0.70 
98.10 
. 63 
055 
515 
100. 00 
3(B). 
4(H). 
1. 10 I 1. 86 
86. 80 86. 96 
11. CO 
. 12 
38 
100. 00 
10.08 
.62 
1.23 
:;.->; 
100.00 
&(C). 
2.78 
77.60 
17.41 
.56 
1.63 
.02 
100. 00 
6(D). 
0.81 
95. 00 
3. 86 
.41 
OS 
100. 00 
Bed A is uppermost; a gray limestone 1 to 2 feet thick, fossil if erons. 
Bed B is a compact brownish limestone, bituminous, 4 to 4£ feet thick, fossiliferous. 
Bed C is a soft, dark -gray limestone, without seams, 7 to 8 feet thick. 
Bed I) is similar to bed C, 8 feet thick; bottom of quarry. 
1 The rocks exposed in the quarry near Dundee are considered by Sherzer as the 
dentical layers that are extensively quarried near Trenton. When sufficiently low 
pi magnesia the beds are evidently favorable for use in making Fort land cement, 
jhe only questionable features seeming to be the expense of quarrying and crushing, 
pertain of the layers at Dundee contain petroleum, the influence of which on the 
pixing of slurry is not known. 
I The following notes concerning the Sibley quarry at Trenton, Wayne County, have 
peen kindly furnished by Mr. Frank Leverett. 
I The quarry occupies an area of 35 acres. The rocks dip westward at the rate of 
Ibout 5 feet in 100. There is a low anticlinal arch trending approximately east and 
jvest, which passes through the midst of the excavation, from the crest of which the 
beds dip away at the rate of about 1 foot in 100. The strata are cut by two systems 
If joints, bearing about N. 20° E. and N. 60° E. The quarry is situated in an irreg- 
ular hill which rises about 30 feet above the level of the adjacent portion of Detroit 
ttiver. On the higher portions of the hill there is no covering of drift, but on the 
jides the solid rock is concealed beneath several feet of till. Where the glacial 
leposits have been removed, the surface of the rock beneath is intensely glaciated, 
phere are two sets of glacial grooves, of which the earlier bears about S. 28° W. and 
he later approximately N. 30° W. 
a a W. H. Sherzer, Geological report on Monroe County, Michigan: Geol. Survey Michigan, Vol. VII, 
lit. 1, 1900, pp. 75-76, 177-178. 
