MISSOUBI IR&N ORBS OF THE CARBONIFEROUS AGE. 65$ 



north of Kevada, Te-wioii county, the western part of Cedar county, on 

 Panther Creek, Bates county, near Eoekville, and on the same creek a few 

 miles north. 



In the northwest corner of Jasper there appears a two inch band of poor 

 quality of cl'ay ironstone, which contains much iron pyrites. The owner 

 thereof confidently believed the rock to contain silver and had commenced 

 the construction of works to reduce the ore. He was not inclined to accept 

 our advice against such foolish expenditure of time and labor. 



All of the above coal measure ores are impure carbonates, and will yield 

 from 30 to 40 per cent, of metallic iron. An ochreous crust is often found 

 on the exposed surface. The layers are often jointed, the joints lined with 

 calcite and sometimes with a thin plate of pyrite or zinc blend. 



RED HEMATITES. 



These occur either as open porous ores, as ochres, or as hard, close 

 grained ores. 



In Linn, Sullivan and Adair counties there occurs from ten to fifteen 

 feet of red shales, soft and smooth feeling, which in many places include 

 nodules of hard close-grained ore, varying in size from quite small to pieces 

 three or four inches in length and two inches thick ; their prevailing shape 

 being roundish elongated. A fracture often exposes minute seams of car- 

 bonate of lime, which, especially partly compose the remains of fossils, of 

 which a few well recognized coul measures species were observed, including 

 Discina nitida and Myalina Swallowvii. Near Linneus, and also on Locust 

 creek and Spring creek, three miles southeast of Laclede these nodules are 

 quite abundant. On Locust creek and Spring creek, Sullivan county, and 

 at many places in Adair, also in the eastern part of Linn, these red shales 

 prevail and are quite ferruginous and would undoubtedly form a good paint, 

 yet the ore nodules are small and not so abundant. An analysis of a nodule 

 from Garretts, near Linneus, by Mr. Chauvenet, gave sixty-two per cent, of 

 metallic iron. Near Calhoun, in Henry county, red hematite occurs as a 

 porous ore of apparently good quality, and soft enough to be easily crushed. 

 The bed is about five feet thick, and underlies nearly ten acres of ground. 

 It is overlaid by a few feet of loose nodules of kidney ore dispersed through 

 the shales. 



"We also find, both at Clinton and Calhoun, Henry county, a six inch 

 band of red hematite, quite fossiliferous. The evidence is, that this ore has 

 been altered from a limestone nucleus with a ferruginous crust of red and 

 brown ochre. At Calhoun, the interior is of an ash drab, next a half inch 

 I'ed band, then a half to three quarter inch of alternations of red and brown 

 with brown exterior. At Clinton, it is deep red throughout. The fossils 

 contained are typical of coal measures, and are : Productus Mervicatus, 

 It. prattenianus, E.emi'pronites crassus, Chonetes mesoloba. Ch. Verneuilliana, 

 Spirifer planconvexus, and Discina. 



LIMONITES. 



The Limonites are either hard or soft, brown or yellowish. The Knob 



