82 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



568. Loughlin, G. F. 



Map of Glacial deposits in central Connecticut. 



Connecticut State Geol. Nat. Hist. Surv., Bull. No. 4, 

 pi. i, 1905- 



Map of area from Massachusetts line to New Haven, and from Mid- 

 dletown to Southington. Areas of till, sand, high gravels, alluvium, 

 clay of economic value, are shown. Scale approximately i inch=:2 

 miles. 



569. Lyman, B. S. 



A conjectural map of the Connecticut and Massachu- 

 setts New Red sandstone. 



Am. Phil. Soc, Proc, xxxiii, 202, 1894. 

 Scale I inch =: 1 6 miles. 



570. McGee, W. J. 



Map of the United States, exhibiting the present status 

 of knowledge relating to the areal distribution of geologic 

 groups. (Preliminary compilation.) 



U. S. Geol. Surv., 5th Ann. Rept., for 1883-84, pi. ii, 

 1885. 



Locates the eastern and western highlands of Connecticut as 

 Archaean except a small area of Silurian in the northwestern part of the 

 state. Locates also the central Jurassic-Triassic formation. 



571. Maclure, W. 



Geological map of the United States east of the Missis- 

 sippi, accompanying " Observations on the geology of 

 the United States." 



Am. Phil. Soc, Trans., vi, 1809. 



Connecticut colored as Primitive rocks, or uncolored, except two 

 areas of Secondary, one reaching from Long Island Sound to Hart- 

 ford, the other an oval area west of the Naugatuck. Base map used 

 is by Samuel G. Lewis. Scale approximately i inch =r 90 miles. 



(This is the earliest geological map of the eastern part of the 

 United States.— Erf.) 



572. Maclure, W. 



Geological map of the United States, accompanying 

 " Observations on the Geology of the United States." 



Am. Phil. Soc, Trans., (new series) i, pi. i, 1818, Abra- 

 ham Small, Philadelphia, 1817. 



In this second edition of Maclure's map the same formations are in- 

 dicated in Connecticut as were shown in the first edition; viz.. Primitive 

 and Old Red sandstone. (This map reproduced in 1822 by P. Cleave- 

 land, in "An Elementary Treatise on Mineralogy and Geology," 2d 

 ed., Boston; and by Charles Moxon in "The Geologist," for 1843, 

 London. — Ed.) Scale i inchrzi20 miles. 



