82 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull, l; 
48G Salisbury (Rollin D.). Surface geology: the Yellow gravel. 
N. J. Geol. Surv., Rept., 1893, pp. 39-72. 
Describes the deposition and distribution of tbe Yellow gravel. Di 
cusses tbe evidences as to tbe ago of tbese beds. 
487 Surface geology : extra-moraiuic drift. 
N. J. Geol. Surv., Rept., 1893, pp. 73-123. 
Describes tbe cbaracter and distribution of tbe drift on tbe Triass 
formation and on tbe area to tbe nortb of it. 
488 Surface geology : the terminal moraine. 
N. J. Geol. Surv., Rept., 1893, pp. 124-151. 
Describes tbe course of tbe terminal moraine in New Jersey as show 
on tbe map wbicb accompanies tbe report. 
489 Surface geology : drift deposits made under the influence 
stagnant ice. 
N. J. Geol. Surv., Rept., 1893, pp. 152-156. 
Describes a peculiar type of terraces formed between a valley k 
lobe and tbe bounding rock slope of tbe valley. 
490 [On the twofold division of the Columbia formation.] 
Geol. Soc. Am., Bull., vol. v, p. 24 (£ p.). 
In discussion of paper by N. H. Darton on tbe "Cenozoic history < 
eastern Maryland and Virginia. 7 ' 
491 [Time break between the Lafayette and Columbia formations 
Geol. Soc. Am., Bull., vol. v, p. 100 ( 6 1.). 
In discussion of paper on tbe "Succession of Pleistocene formation 
in tbe Mississippi and Nelson River basins," by Warren Upham. 
49Dt A phase of superficial drift. 
Abstract: Am. Assoc. Adv. Sci., Proc, vol. xlii, p. 180 (7 1.). 
491/, An illustration of the effect of stagnant ice in Sussex County 
N.J. 
Abstract: Am. Assoc. Adv. Sci., Proc, vol. xlii, p. 180 (§ p.). 
492 and Kummel (Henry B.). Surface geology: Lake Passaic 
an extinct glacial lake. 
N. J. Geol. Surv., Rept., 1893, pp. 225-328. 
Discusses tbe classification of sbore features and lacustrine deposit! 
and describes tbe shores of Lake Passaic, its lacustrine deposits, am 
the history and deformation of the lake basin. 
4D3 ail( i p eet (Charles E.). Surface geology : drift phenomena o: 
the Palisade ridge. 
N. J. Geol. Surv., Rept., 1893, pp. 157-224. 
Describes the topographic relations of the ridge, the glacial stria 
and erosion, the perched blocks, and other glacial phenomena. 
494 Sardeson (F. W.) Note on " Nanno." 
Am. Geol., vol. xiv, pp. 402-403 (correspondence). 
Refers to a previous article and descriptions. 
