524 KANSAS CITY REVIEW OF SCIENCE. 



ering of over twenty years have caused it at present to have quite a weather- 

 beaten appearance and the frost has probably opened a few argillaceous seams in 

 it. Otherwise it seems durable. 



The quarry shows about twenty feet thickness of white limestone, one bed 

 of which is six feet in thickness. The upper ten feet is a little brown tinged, and 

 contains the characteristic fossil Receptacidites Oweni, showing the beds to be 

 Lower Silurian of the age of the Galena group. The west end of the quarry pre- 

 sents an interesting feature in having an intrusion of brown sandstone thirty feet 

 in width and widening northwardly, connected with overlying sandstone strata 

 beyond. There really had been a ravine in the limestone prior to deposition of 

 the sandstone, subsequently deposited and resting on and flanked by the lime- 

 stone. The lime-quarries at Glencoe, St. Louis County, Missouri, are of the 

 same geological age as the Cape Girardeau hmestone and burn into excellent hme. 

 At Glencoe a fine specimen of Illcenus iyBuniastus) trentonensis was obtained. 



The marble quarries proper of southeast Missouri are included in two groups. 

 The older or lower are Potsdam, the others are Upper Silurian. The Potsdam 

 q'uarries are found in Madison, Iron, and Reynolds, and are located on Stout's 

 Creek, and Marble Creek in Iron; Cedar Creek, Marble Creek and Leatherwood 

 Creek in Madison, and Tom Luck Creek in Reynolds County. 



CEDAR CREEK MARBLE. 



Near Little Vine church, near the head of Cedar Creek, are several outcrops 

 of variegated red and drab marbles. A section of rocks on a southeastern branch 

 of Cedar Creek shows ten feet of coarse magnesian limestone resting on ten feet 

 of light drab marble of fine grain, traversed with brown veins. A section on west 

 side of St. Francois River near mouth of Leatherwood Creek shows 

 I. Four feet rough beds of dark ash magnesian limestone. 



Four feet of gritty dolomites. 



Four feet of fine-grained magnesian Hmestone spotted with green. 



Five feet of whitish and brownish limestone. 



Three feet of gritty dolomites. 



Five feet of coarse, brown spotted magnesian limestone. • 



Two feet of fine-grained magnesian limestone, color drab. 



Four feet magnesian limestone. 



Twenty feet outcrops of marble, light color, with calcite specks and re- 

 sembling that found on Marble Creek. 



The rocks dip at an angle of 22°, course south, 65° west, near Little Vine 

 church. The marble beds are red and alternate with red conglomerate beds 

 which contain porphyry pebbles. 



The finest exposure and containing the most handsome varieties of marble 

 is on the land known as belonging to the Cooper heirs near the mouth of Cedar 

 Creek, Madison county. I have recently heard that it was being purchased by 

 the Knob Lick Granite Company, who probably would develop it. The marble 

 probably underlies two hundred acres. The rock here has been quarried in small 



