234 
CEMENT MATERIALS AND INDUSTRY. 
I BULL. 24 
even more feet in thickness. Locally they are so massive and the fo 
mation is so regularly jointed that it is extremely difficult to dete 
mine the true position of the beds. Some layers, also, are oolit 
i. e., made up of minute round particles somewhat closely resemhlin 
fish roe. The oolitic layers are apparently confined to the lower pq 
tion of the formation. 
A marked feature of this formation is the chert, or black flh] 
which occurs either as seams, sometimes 8 or 10 inches thick, or 
separate masses. The chert layers are usually, but not always, pa 
lei to the bedding planes. Owing to the large percentage of magnes 
nearly everywhere present in this limestone it is of no value in 
manufacture of Portland cement. In some localities, however, it h 
been extensively burned for lime. 
Its thickness is apparently between 2,500 and 3,000 feet, but acd 
rate measurements can not be obtained. More than 99 per cent J 
the limestone of Sussex, Warren, and Hunterdon counties belongs 
this formation. 
Analyses ofmagnesian Kittatinny limestones, New Jersey. a 
Lime (CaO), 
Hi 
17. 
18. 
L9 
20 
27.6 
30.4 
30. 
29. 3 
29.1 
27.9 
30. 3 
23.6 
26.5 
29.4 
28.6 
29.0 
28.5 
29.6 
29.6 
29.2 
30.1 
30.8 
29.8 
28.2 
Magnesia 
(MgO). 
17.9 
19.1 
19.4 
19.5 
19.3 
17.7 
16.2 
16.2 
18.4 
20.3 
18.1 
20.2 
17. 3 
20. 
19.2 
18.8 
20.1 
19.2 
19.9 
17.7 
Carbonic 
acid (CO.). 
41.9 
44.9 
44.9 
44.6 
43.6 
41.4 
41.6 
36. 04 
40.4 
45.7 
34. 5 
44.9 
41.5 
45.4 
46. 2 
43.6 
44.4 
45. 4 
45. 4 
41.7 
Alumina and 
iron oxide 
(Al 2 3) Pe 2 3 ). 
1.7 
.8 
2.7 
2. 2 
1.2 
.0 
.6 
6.0 
5.43 
.6 
' .9 
.9 
1.7 
1.4 
1.4 
2.4 
.8 
1.1 
1.0 
Silica aril 
insolubl 
material > 
(SiOj 
3 
4 
I 
11 
c 
V 
aAnalyses 1-7, 10-21, 27-33 are from the Geology of New Jersey, 1868. Analyses 8 and 9 are fill 
the Annual Report of the State Geologist for 1873; Nos. 22-25 from'the report for 1878; No. 26 from 
report for 1876, and Nos. 34-39 were made by Mr. Myers, of Rutgers College, for the Annual R£J 
for 1900, New Jersey State Geologist. The entire table is taken from page 33 of the last-named rep 
