492 



TRANS. ST. LOUTS ACAD. SCIENCE. 



Borings at Blue Rapids reveal gypsum and a thin seam of coal. 

 At Waterville, five miles west, the rock seen on hilltop at Blue 

 Rapids is lov^^ in the hills. The same rock, a buft' limestone, is 

 seen at Maryville, 14 miles north. 



The limestones at Maryville, the county seat of Marshall Co.. 

 are of a buff color and quite soft, v^^ith occasional specimens of 

 Allorisma subcuneata. The quarries in the valley of the Cotton- 

 wood, Chase county, contain about 6 feet of very good building 

 stone of closer texture and apparently better than the Manhattan 

 rock. The associated shale beds abound in fine fossils, including 

 Prod, semireticulatus., Hemp, crenistria.^ a large variety of Cho- 

 netes g-ranulifera^ and Athyris subtilita., Archceocedaris^ and a 

 Crinoid. Similar fossils can also be obtained at Florence, where 

 the upper limestones are quite flaggy. The lower limestones 

 here are also quite cherty. 



At Marion Centre, Marion county, we find higher strata, with 

 but few fossils. The upper layers form good flags, the lower are 

 much used for building. Aviciilopecten occidentalis and Fusu- 

 lina cylitidi-ica were the only fossils seen. 



