48 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [BuU. 



capped by 20 feet of greenstone; the ripple-marked and cracked shale 

 shows drying and shrinking during deposition; there were eruptions of 

 trap, accompanied by upheaval and partial denudation, during the de- 

 position of the red sandstone; impressions made in the red sandstone by 

 some animal — undoubtedly a biped — resembling those which a bird 

 leaves; the position of the sandstone is between the Carboniferous and 

 Cretaceous. In the neighborhood of Durham, the author' collected 

 fishes of the genera Palaeoniscus and Catopterus, but no other organic 

 remains except fossil wood. 



195. Lyman, B. S. 



Some New Red horizons. 



Am. Phil. Soc, Proc, xxxiii, 192-215, 1894. Abstract: 

 Am. Nat., xxviii, 878-879, 1894; Jour. Geol., ii, 644, 645, 

 1894. 



Brief review of Triassic theories. Description of Pennsylvania, Vir- 

 ginia, Connecticut, New Jersey, and Massachusetts areas, to show 

 that the thickness of the formation has been underestimated (in 

 Pennsylvania should be 27,000 feet) ; that the trap outcrops, both in size 

 and extent, have been overestimated; that faults are not necessary for 

 production of the topographic forms; that the formation may prove to be 

 as old at least as the Permian. Most of the trap supposed to be ex- 

 trusive, even the Palisades. List given of all the recorded New Red 

 fossils arranged according to horizons. 



(See critical review, by G. K. G., Jour. Geol., ii, 644-645.) 



196. Maclure, W. 



Observations on the geology of the United States, etc. 

 (explanatory of geological map). 

 Am. Phil. Soc, Trans., vi, 411-428, 1809. 



Adopts the Wernerian system, and giveS a classification embracing 

 all the formations. Remarks the continuity of the dolomite, speaks of 

 cobalt at Middletown, and discusses relation of rocks of eastern United 

 States. 



197. Maclure, W. 



Observations on the geology of the United States of 

 North America, with remarks on the probable eflfects 

 that may be produced by the decomposition of the differ- 

 ent classes of rocks on the nature and fertility of soils; 

 applied to the different states of the Union, agreeably to 

 the accompanying geological map. 



Am. Phil. Soc, Trans., (new series) i, 1-91, 2 pis., i8r8; 

 Leonhard's Zeitsch., i, 124-138, 1818. 



Description of the " Primitive," " Transition," " Secondary," and " Al- 

 luvial " formations of the United States, east of the Mississippi. Some 

 accounts of soils resulting from the decomposition of these rocks. The 

 crystallines of Connecticut are designated as " Primitive " and the 

 Triassic as " Old Red sandstone." 



198. Marcou, J. 



Geological map of the United States, and the British 



