No. 8.] BIBLIOGRAPHY OF CONNECTICUT GEOLOGY. 83 



573. Marcou, J. 



Geological map of the United States and the British 

 provinces of North America. 



Boston, Gould and Lincoln, 1853; Petermann, Mittheil., 

 i, pi. XV, 1855; Soc. Geol. France, (2d series) »ii, 1853; 

 Geology of North America, Zurich, 1858. 



Triassic shown as New Red sandstone or Keuper containing an area 

 of copper trap. The rest of the state shown as eruptive and metamorphic 

 rocks. Scale approximately i inch =390 miles. 



(The formations are poorly located and poorly bounded. There 

 seems little excuse for such crude mapping of Connecticut geology 13 

 years after the publication of Percival's Report. — Ed.) 



574. Martin, D. S. 



Geological map of New York city and vicinity, accom- 

 panied by a pamphlet of explanatory text. New York, 

 1888. 



A part of Connecticut west of a line from Greenwich to Banksville is 

 marked " Atlantic or Manhattan gneiss, age disputed." A belt of lime- 

 stone projects into this area from the north. Scale i inch=:2 miles. 



575. Mather, W. W. 



A geological map of Windham and New London coun- 

 ties. 



Sketch of geology of New London and Windham coun- 

 ties, by W. W. Mather, 1832. 



Ten bed-rock formations are shown in color, as are also quarries 

 and mines of stone, iron, peat, clay, plumbago, and mineral springs. 

 Two sections accompany the map. Scale approximately i inch :^ 5 miles. 



576. Merrill, G. P. 



Map of the marble regions of western New England. 

 Smithson. Rept., pi. vii, 1886. 



Includes the western part of Connecticut. The following forma- 

 tions are indicated: Archaean or Primitive, Potsdam, limestone, slate 

 or gneiss. 



577. Percival, J. G. 



Map of Connecticut — east and west sections of Ken- 

 sington, in Berlin. 



Am. Jour. Sci., (i) v, 42, 1822. 



Gives locality of sulphate of barytes, coal, lead, zeolites, shale; 

 greenstone and sandstone ridges, alluvial flat; stalactites, quartz crys- 

 tals, granite block, vein of carbonate of lime; mills, bridges, roads, etc. 



578. Percival, J. G. 



A geological map of Connecticut. 



Report on the geology of the state of Connecticut. 

 Published by the Legislature, New Haven, 1842. 



The base map shows rivers, lakes, divides between streams, and 



