LESQUEEEUX.1 EVIDENCE OF AGE OF LTGNITIC GROUP. 285 



c Oening-en.* 

 Miocene. < Mayeuciau or Helvetian.f 



( Aquitanian.J 

 Armissan, Bonnieux, aucl Maiiosque, France, intermediate between 

 the Lower Miocene and the Oligoceue. 

 Oligocene. Tongriau. § 



-r, i Gvpses of Aix, Alum Bay, Mount Bolca, London Clay. 



±.ocene. I Sheppey, Gres of the Sarthe. 



^ Upper Landeuiau : Sezanne same as the Belgian Panise- 

 lian. 

 -p ^ ^ r, \ Lower Landenian : Sand of Bracheux, Lignitic soisson- 

 raieocene. ^ ^^^^^ (Suessouian.) 



Hersian : Gelinden. 



Limestone of Mous, unconformable to the Cretaceous of 

 ■ ^ Maestrich, which it overlies. 



Some authors consider as Cretaceous the sands of Bracheux and Gel- 

 inden, as indicated by the characters of the flora of Gelinden. 



These subdivisions of the Tertiary of Europe seem to expose a pro- 

 digious thickness of the formation, and to indicate a great dispropor- 

 tion of vertical extent in comparison to the American measures of the 

 same age. There may be indeed a marked difference but as vet very 

 little is known of the Tertiary of this continent, and certainly this little 

 takes already, by its wide area and the thickness of some of its divis- 

 ions, an important place in the Korth American geology. 



Last year Prof. F. Y. Haydeu discovered, near Point of Eocks, 

 some beds of shale with rich deposits of vegetable remains, and obtained 

 a large number of specimens. This locality is between Black Butte 

 Station, nine miles northwest of it, and Salt Wells, another station of the 

 Union Pacific Railroad, about the same distance farther west. From 

 Prof. B. F. Meek's report and from my own || it nifty be seen that from 

 Black Butte to Point of Eocks, in following the railroad, the northeast- 

 ern dip of the measures brings successively in view a series of heavy 

 sandstones, interstratified with beds of clay and lignite, whose whole 

 thickness, according to Messrs. Meek and Bannister, is estimated at 

 about 4,000 feet. The series of these rocks is beautifully exposed by a 

 diagram in the report. My own estimation gives only half this thickness. 

 But as I did not take any measurements, the purpose of my explorations 



. 'Represented at Lode, Montaron, Albis, Steckborn, 'E]gg (Switzerland); Schossnitz 

 (Silesia) ; Guusburg (Bavaria) ; Parschlug and Gleichenberg (Syria) ; Tokay (Hungary) ; 

 Singaglia, Stradella, Guarene, Sarzanello, Val d Arno (Italy). 



t Represented at Delmont, Deveiller, Aarwang, tunnel of Lausanne, Calvaire, Riant 

 Mount, St. Gall, Solitude, Monglen, Ruppen, Alstiitten, Oberaegeri Buron (as Mayen- 

 cian) ; ;t Petitmont, Estave, Croisettes, Montenailles, Moudon, Payerne (as Helvetian), 

 (Switzerland): Bovey-Tracy (England); Monte Bamboli, Superga (Italy); Menat, Ger- 

 sovia (France) ; Le Khon, Wetteren (Lower Lignitic), Basin of Mayence, Kempter, Gunz- 

 burg (Germany); Bilin (Bohemia); Radoboy (Croatia) ; Tohnsdorf, Koflach, Eibiswald 

 (Styria) ; Basin of Vienna (Austria). 



+ Represented at Railing, Schwartzachfobel, Wiiggis, Vevay, Monod, Rivaz, Dezaley, 

 Paudex, Rochette, Conversion, Brul<2es, Rufiberg, Rossberg, Hohe-Rhone (Switzerland); 

 Spechbacb (Alsace); Lower Succinifer Tertiary of the Baltic, Spitzberg, Iceland, includ- 

 ing, perhaps, the whole miocene series, Greenland, Mackenzie, Alaska ; Cardibone, Selzedo, 

 Novale,Zoreucedo Vegrone (Italy); Kami, Iliodroma (Greece); Menat (France); Rot, 

 near Bonne, on the Rhine. 



§ Armissan? Peyrac, Saint Jean of Garguier, Basin of Marseilles, St. Raccharie (Var.), 

 Apt, Gypses of Gargas, Vaucluse, Castellane (France) ; Sechbach and Lobsart (Als'ce); 

 Mount Promine (Dalmatia) ; Sagos (Krain) ; Haering (Tirol); Sotzka (Styiia); Peissenburg 

 and Miesbach (Bavaria) ; Alsattal and Kushlin (Bohemia); Sieblos (Rhon Mountains); 



Beernstadt and Wttssenfield (Thnriugia). . These data on the distribution of the 



Tertiary in Europe are mostly derived from Schimper's Vegetable Paleontology. 



II Dr. F. V. Hay den's Sixth Annual Report for 1872. Professor Meek's sections and dia- 

 gram of the measures are given at pp. .53U, 539, 534. 



