REVIEWS 307 



it and the source of the glacial motion, and several miles distant, is 

 not easily understood. The suggestion does not seem to have sprung 

 from a serious consideration of the conditions of the problem. 



T. C. C. 



Report 071 the Valley Regions of Alabama { Pa Icsosoic Strata^. Parti. 

 Oj) the Tennessee Valley Regions. By Henry McCalley. 



The palaeozoic area in northern Alabama may be divided into two 

 regions. That to the northwest, drained chiefly by the Tennessee 

 River and its tributaries, is characterized by the nearly horizontal and 

 undisturbed condition of the strata. The region to the southeast, 

 drained by the Coosa River, is a region of greater disturbance with the 

 geologic features much complicated by the folding and faulting of the 

 strata. The first of these regions is described in the present report; 

 part two of the report, not yet published, will treat of the second or 

 Coosa valley region. 



The report is divided into two sections, the first of which is a gen- 

 eral treatment of the physical features, geology, natural resources, soils, 

 agricultural features, timber, waterpower, climate, rainfall, drainage, 

 and health. Much the larger part of the report is devoted to the sec- 

 ond section which treats of county details. 



Chapter two of the first section entitled Geology describes the 

 stratigraphy of the region and is the only portion of the report of gen- 

 eral interest. The following table of formations is given : 



(8) Tertiary (k) Lafayette 



(7) Cretaceous (j) Tuscaloosa 



(6) Carboniferous (i) Coal Measures 200-500 feet 



(5) Upper Sub-Carboniferous \ f\ Bangor limestones, 200-450 feet 



^■^' '' ((to) Hartselle sandstones 150-400 feet 



r(f) Tuscumbia or 



/NT c 1 r- I f I St. Louis limestones 75-200 feet 



(4) Lower Sub-Carboniterous - / n t j 1 1 

 ^ ' \ (e) Lauderdale or 



1^ Keokuk chert 100-250 feet 



(3) Devonian (d) Black shale 0-45 feet 



, -, TT fi • \ (c) Red Mountain or 



(2) Uiiper bilunan -, ^ ' r-i- ^ /m- \ , r ^ 



^ ^ '' / Chnton (Niagara) 3-350 feet 



f (b) Pelham or 



( ■,\ T ^„.^,. c;i,,,.;o^ Trenton (Nashville, 700-1000 feet 



(i) Lower hdurian ■<^ , > , ' ' 



^ I (a) Siliceous (Knox) 



[^ dolomite and chert 2000 feet 



