lesquereux.1 EVIDENCE OF AGE OP LIGNITIC GEOUP. 285 



f Oeningen.* 

 Miocene. < Mayeuciau or Helvetian.t 



( Aquitauian.l 

 Armissan, Bonnieux, and Manosque, France, intermediate between 

 the Lower Miocene and the Qiigocene. 

 Oligocene. Tougriau. § 



■c, j Gvpses of Aix, Alum Bay, Mount Bolca, London Clay, 



eocene. ^ Sheppey, Gres of the Sarthe. 



( Upper Landenian : Sezanne same as the Belgian Panise- 

 lian. 

 p , I Lower Landenian : Sand of Bracheux, Lignitic soisson- 



' { nais, (Suessonian.) 



Hersian : Gelinden. 



Limestone of Mons, unconformable to tbe Cretaceous of 

 Maestrich, wbich 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 North American geology. 



Last year Prof. F. V. Hayden discovered, near Point of Rocks, 

 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 may 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 iu 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, Moutaron, Albis, Steckborn, Elgg (Switzerland); Schossnitz 

 (Silesia); Gunsburg (Bavaria) ; Parschlug and Gleicbenberg (Syria) ; Tokay (Hungary) ; 

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



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

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

 cian); vt Petitmont, Estave, Croisettes, Montenailles, Moudon, Payernc (as Helvetian), 

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

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

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

 (Styria); Basin of Vienna (Austria). 



X Represented at Railing, Scliwartzacbtobel, Wa'ggis, Vevay, Monod, Rivaz, Dezaley, 

 Paudex, Rochette, Conversion, Bruises, Rufiberg, Rossberg, Hohe-Rhone (Switzerland); 

 Spechbaeh (Alsace); Lower Succiuifer Tertiary of the Baltic, Spitzberg, Iceland, includ- 

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

 Novale, Zorencedo Vegrone (Italy); Kurni, 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 Bromine (Dalmatia); Sagos (Krain) ; Haering (Tirol) ; Sotzka (Styiia); Peissenburg 

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



Beernstiidt and Wussenfield (Thniingia). . These data on tbe distribution of the 



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



|| Dr. F. V. Haydeu's Sixth Annual Report for 1872. Professor Meek's sections and dia- 

 gram of the measures are given at pp. 530, 539, 534. 



