REVIEWS 471 



entiated Jefferson City and Coal-Measure shale, Burlington limestone, 

 Graydon sandstone, Saline Creek conglomerate, and coal and Coal- 

 Measure shale, of Carboniferous age; and the alluvium, of Pleistocene age. 



The field-work on the report under review was begun in November, 

 1 90 1. At that time there were forty-nine counties for which reports and 

 maps had never been issued; forty-nine counties for which general recon- 

 noissance reports had been published; one for which a complete detailed 

 report had been published ; and twenty parts of counties for which detailed 

 reports had been published. It is the purpose of the Survey to issue reports 

 in detail upon the forty-nine counties for which no reports have been pub- 

 lished, and under this scheme the report on Miller county is the first to 

 appear, although the field-work has been done in two other counties. 

 County reports are to be issued in preference to sheet reports, because it 

 is the belief that they serve better the interests of the citizens of the state. 

 It is the general plan of the Survey to extend the county surveys to the 

 southwest, southeast, northeast, and northwest, thereby connecting with 

 the surveys of the lead, zinc, and coal fields of the state. 



In the Geology of Miller County all phases of the subject are discussed 

 in considerable detail. In the chapter on the physiography of the region 

 the different types of surface relief are first described, and the relations of 

 physiographic types to industrial and social conditions are set forth in a 

 brief but very interesting way. The major portion of the report is then 

 taken up with careful descriptions of the different geological formations, 

 dealing with their areal extent, thickness, bedding, weathering,^ composi- 

 tion, texture, relations to adjacent formations, porosity, color, fossils, 

 topography, etc. A chapter is devoted to a discussion of structure, with 

 folding and flexing, faulting, jointing, and unconformities as sub-headings. 

 Another chapter deals with the origin of chert and dolomite. The final 

 chapter is given over to economic considerations, and consists of descrip- 

 tions of the manner of occurrence, origin, and other characteristics of 

 barite, building-stone, clay, coal, iron, ore limestone, lead, and zinc, road 

 materials, sand, silica, soils, etc. 



The Geological Survey of Missouri has been in existence for a good 

 many years and has issued some excellent reports. It has done a notable 

 service to the people of the state, and to it also the geologists of the country 

 are indebted. The volume just issued will be of great value to the citizens 

 of Miller county, and will be well received by all persons without the county 

 who are interested in geology. The report is written in such a way that 

 it can be used in the pubHc schools of the state, and is hence of direct educa- 

 tional value. It is so complete in its treatment of the subject that another 



