AKTIULE \ II. 



'IIR CRETACEOUS AND TERTIARY GEOLOGY OF THE SERGIPE- 



ALAGOAS liASIN OF BRAZIJ.. 



BY JOUX C. nRANNKIl, Ph.D., 



PROFESSOR OK GEOUKiY IN TIIK l^NlVKItslTY OF INDIANA, 

 STATF. <iEOI.O(il.ST OF AUKANSAS, FORMF.lil.Y A!i<lSTANT GROI.OIilST <1F TIIF. IMPEEIIAI. i:E<>I.OMCAI, SI'IIVIV ol r.lIAZII.. 



Read before the American Philosophical Society, September 7, 1888. 



r.\Ki' I. 

 Prefatory Notes. 



Tn the years 1875 and 187G, while assistant geologist on the Imperial Geological 

 Survey of Brazil ("A Commissao Geologiea do Imperio do Brazil"), I si)ent several 

 months in examining the geology of the provinces of Pernambuco, Alagoas and Ser- 

 gipe. The work done was but little more than a hasty reconnoissance, made without 

 any maps whatevei-, even of the rudest kind, and without either time, instruments or 

 appropiiation for making them, 



I cannot therefore refrain from expressing my reticence in regard to publishing 

 what little I know concerning the geology, of the region treated of in the present 

 paper. Althoiigli tlie work of the Imperial Survey in the I'ogion was all that could 

 have been accomplished in the time occupied, and though it was much more extensive 

 than any done prior to my visit, it was far from satisfactory. 



Three other reasons have caused this delay in the publication of my observations. 

 First, I hoped that the Brazilian Government would see lit to have the results of the 

 Survey's work published more in detail than is possible here. This has not only 

 never been done, but 'until the pul)lication by that government of Dr. C A. White's 

 important "Contributions to the Pahuontology of Brazil"' none of the results have 

 been l^rought out, except as the foiiuer memlicrs have found tiuie to prepare iHicf 

 papers and [niblish them wherever an opportunity olfcrcd. Evcmi in the case of Dr. 



A. r. s. — VOL. XVI. 2u. 



