No. 8.] BIBLIOGRAPHY OF CONNECTICUT GEOLOGY. ^J 



537. Emerson, B. K. 



Map of eastern half of Housatonic quadrangle. 



U. S. Geol. Surv., Bull. No. 159, pi. ix, 1899. 



Geological map of that part of Connecticut found on the Sandis- 

 field topographic sheet; includes northern halves of Colebrook and Noi- 

 folk, with parts of Hartland and North Canaan. Scale approximately 

 Yi inch =1:1 mile. 



538. Pippin, E. O. 



Soil map of the Connecticut valley. 



U. S. Dept. Agric, Bur. Soils, Rept. Field Oper. for 

 1903, 1904. 



Map of soil types in Massachusetts and Connecticut. The Connecti- 

 cut area mapped is on the Springfield, Granville, Hartford, Granby, 

 Middletown, and Meriden topographic sheets. Base map is the topo- 

 graphic atlas of Connecticut. Scale i inch = i mile. 



539. Gregory, H. E. 



Map showing water-supplies in areas of limestone, sand- 

 stone, and crystalline rock, of Connecticut. 



U. S. Geol. Surv., Water-Supp. and Irr. Paper No., 114, 

 fig. 17, 1905. 



Scale I inch = 25 miles. 



539a. Gregory, H. E.,and Robinson, H. H. 



Preliminary geological map of Connecticut. 



Connecticut State Geol. and Nat. Hist. Surv., Bull. No. 7. 



The base map, which was prepared especially for the present purpose, 

 shows contours (loo feet), towns, streams, roads, etc. The geological 

 formations, 42 in number, are shown in color. Quarries and clay pits 

 are also located. The map is chiefly designed to differentiate rock 

 types, and only seven formations are assigned to definite ages. Scale 

 I inch=:4 miles. 



(This is the first geological map of Connecticut issued since 1842. 

 See Percival, 578. It is based on data supplied by several workers, 

 and represents the present state of knowledge regarding the bed-rock 

 geology of southern New England. — Ed.") 



539b. Gregory, H. E., and Rice, W. N. 



Maps and diagrams illustrating Connecticut geology. 

 Connecticut State Geol. and Nat. Hist. Surv., Bull. No. 6. 

 (See Rice and Gregory, 582a.) 



540. Griswold, L. S., and Davis, W. M. 



The Connecticut valley Triassic area. 



(See Davis and Griswold, 528.) 



541. Hall, J., and Logan, W. E. 



Geological map of Canada and the United States. 



(See Logan and Hall, 566.) 



542. Hitchcock, C. H. 



Geological map of United States and part of Canada. 

 Am. Inst. Min. Eng., Trans., xv, 486, 1886. 



