TITI.KS AM) ABSTRACTS OF TAVEKS 135 



by tt'ii»p"i-;iry laUos ;iiul short roimoctiu},' chaniu'ls. This will be <lis<-ussetl 

 nt some U'liiiih in tlu' paper. 



Presented by title in tlie ;il)seiK'e ot* the author. 



TKh'llAin /•(>AVU.1770.\>' OF PORTO lilVO 

 BY r.KI.V IirHBARI) ' 



{AhHtnnt) 



An outline is ^iven (»f the results of an extensive Held study of the Tertiary 

 fonnati(»ns of north western I'orto Kico, made for the New York Academy of 

 Sciences in the snnnner of 1910, and of nearly two years of strati^raphic and 

 l>aleontoloj:i<' study in the laboratory. The Tertiary formations of the type 

 Uxalities in northwestern Torto Kico are described, and correlate<l with the 

 other Tertiary formations in Porto Rico, the Antilles, and the South Atlantic 

 States. New evidence is presented bearing upon the Tertiary history of the 

 Antillean region and some unsettled questions regarding the age of the 

 formations. 



Presented in condensed form from notes. 



Discussed by Dr. Marjorie O'C'onnell and Prof. A. W. Grabaii. 



TYPE SECTIOX or Till: MOIfRISOX FORMATION 

 BY WILIJS T. LEE 



(Ahstract) 



The seition at Morrison. Colorado, the type locality of the Morrison forma- 

 tion. i»resents an interesting problem in correlation. The lower part of the 

 HK'ks originally included in this formation prove to belong to an older forma- 

 tion (Sundance), and the upper part is traceable laterally into beds which 

 have been cnlle<l "Lower Dakota" by some geologists and "Pnrgatoire" by 

 others. The upper part contains fossil jtlants which F. II. Knowlton shows 

 in an accompanying paper are of Dakota type. What shall be done with a 

 formation which at its type locality contains beds of .Jurassic age at the base 

 and at the top beds containing fossil plants indistinguishable from those of 

 the Dakota flora? 



Pre.sented without notes. 



Discussed by Messrs. W. II. 'J'wcnliotcl, T. W. Vaufrhaii, and A. W. 

 rjrabau, with replies l)y the author. 



DlScr88ION 



I'r<»f. W. H. TwiMioKr.i.: 'Ilie forKliisions rcafli('<i by Dr. Lee an' ex- 

 tremely interesting and also paiti'iHarly |»leasiii<.'. as I iiidc'iieiidciitly have 



^ Intrwluc»'<l by CharlfH I*. P.^rk^-.v. 



