U.S. NATIONAL MUSEUM 



OZARKIAN-ORDOVICIAN 



GENERAL TIME SCALE 



C^/7tra/ 

 Pennsy/i/an/a. 



A/ajbei/rja. 



Cinc/nnat/dome Nashville dome 



East Missouri 



Arbuckk 

 (Ok/aho. 



SI LURIAN 



Juniata 



Richmond (Arriheim) 



Mfflpfea(BiiffidoB) 

 emvale 



Ternv< 



< 



o 



> 

 o 



Q 

 CC 



O 



MS Mil Ian (Ohio) 



Fairview (Ohio) 



Frankfort (N.Y.) 



Shale 



Utica 



(N^) 



C ynthiana (Ky) 



Perry vi lie (Ky.) 



Flanagan (Ky.) 



Bigby (Ky) 



Trenton Is. 



Wilmore (Ky) 



Hermitage (.Ky) 



Curdsville (Ky.) 



Kimmswick (Mo) 



Decorah (Iowa) 



Water-town (N.Y.) 



.ti.'f 



Eden shale 



Fairmount 

 MtHope(Up.Garraid) 



TttTJcCT 



Fulton 



Lyntiliana jfjg 5 ? 



„j\itoidb"rn — 



Flana§»rv[ 



Lower 

 Trenton 

 limestone 



Bi£by ? Is. c 

 S 



Bigby (Fkris in part) 



Wilmore Is. 



Hermitage (Logana) 



Curdsville Is. 



I Wtttt-t 

 dam Is. 



Christiana fauna 



Lowville . (N.Y) 



Lowville fs. 



Ottosee (Jenn.) 



Tellico 



(Tenn.), 



Athens i (Tenn) 



Holston 



(Tenn) 



Athens (F?od<mart)a> 



Lebanon . (Tenn) 



Pamelia Is. 



Leipers(5wanCr 



Catheys f. 



Curdsville 



Decorah sh. (Upper) 



LoVWillelTyrone'ls 



I Oregon do 



Ridley (Tenn) 



Pierce 



(Tenn) 



Murfreesboro (Tenn.) 



Mosheim (Tenn) 



Stones River \s~. 



:§> Camp Nelson Is 



Viola In 



r c "^ 



Upper Prosser 



1 1 1 1 1 1 1 1 i m 



Kimmswick (Bryant) 



Decorah (Auburn) 



Lcwville (Carters) 



B ^illy l 1 s a ° ,Ver) 



Lebanon Is. 



Ridley Is. 



Pierce Is. 



Murfreesboro Is. 



Bromidi 



/ 



Simps< 

 ■forma 



DC 



s 



Jasoer 



(Ark) 



St. Peter ■ (Minn) 



Everton 



(Ark.) 



Sneed3 



(Ark.) 



Bellefonte (Pa.) 



Bel lefonte dol . 



Axeman (Pa) 



Axeman Is. 



St. Peter (in wells) 



'J; Peter SppSiSI 

 (JoacntrrHS rnemrjt 



Powell Is. 



Cotter Is. 



Nittany (Pa.) 



Nittany dol. 



Ceratopea fauna 



Wells chert 



LOWER 



Stonehenfee (Pa) 



Stonehenfee Is. 



Pelham Is. 



Jefferson City Is. 



Roubidoux ss. 



Dictyonema flabei lifbrrae bed 



Represented ' 



Gasconade (Mo.) 



reside 



UPPER 



Copper Ridfee (Tenn) 



Copper Rid£ech 



Gasconade Is. 

 rfiuntgrss.me.-nber) 



Proctor dol. 



Eminence (Mo) 



Lower Knox 



Eminence chert 



Little Palls (N.Y) 



LOWER 



Hoyt 



Potsdam 



Represented 



Bib dol. 



Potosi Is. 



Ketona. dol. 



Briarfield dol. 



CAMBRIAN 



UPPER 

 MIDDLE 

 LOWER 



St.Croixan 



Acadian 



Represented 



Waucoban 



Hi 



Nolichuckyw. 

 Marysville Is. 

 Ro gersville sh 



Y^'c"f .:.Lx 



Arbuckk 

 (Main rr 



