THE GEOLOGY OF NORTH DAKOTA 



GENERALIZED GEOLOGICAL SECTION 



OF 



NORTH DAKOTA 



5Y5 



TEM 



RDRMATION NAME 



COLUMNAR 



SECTION 



TH1D<NE55 

 IN FEET 



CHARACTER OF ROCKS 



d: 

 < 



h 

 d 

 u 

 h 



LAKE 51 LT 



Unconrorrrtity 



0-50 



GLACIAL DRIFT 



Unconfdrmity 



WHITE RIVER FORMATION 



C/nconfbrmity 



F)ne/y /om/nafed sandy c/ay. 



0-400 



Bou/der' c/ay. ^an<J_gr'aye/ <^ i)ou/den3. 



FORTUNION FORMATION 



AQ-AQO 



Coarse sard3fone conta/n/rtg fleb6/es. ca/- 

 c/ay and fresh-wafer ffmesfone. 



1000" Wh¥v an<f ashtray afjafe. aandsfone. and 

 1*500 c/ay, wfffJ nu/rjerol/s beds of fiffn/fe. 



> 



< 



h- 

 cr 



LiJ 



h 



m 



D 

 LJ 

 U 

 < 

 t- 



Ld 



q: 



u 



LANCE FORMATION 



Uncon/brm/fy 



FOX HILLS FORMATION 



PIERRE 5HALE 



■ 6 



700- 



Canf?onbo// mar/ne member: 

 £)ar-k sandy sha/e. and ■s/ra/y aandJtonw. 

 ye//o\A/ sondsfone. con/a/ning martne 

 she//s OSOO reer. 



Lt/c//ow /fgn/tic member. 

 Light sandy sho/e . ca/coreous 

 sandstone and //gnire. 0-350 feeA 



DarJf' co/o/~ed sho/e . ye//o^v sandstone 

 ana/ tti/n //g/iite beds '^00-3£5 f^et. 



f50 



ye//ot<i' sandstone, y^/th nunnerous con- 

 3he//s. 



3/ue sho/e conta/n/ng 



NIOBRARA FORMATION 



400 



Cho/ky /f'mestone and ca/coreous sho/e. 



BENTON 5HALE 





500 



Dar/r- co/ared ry?ar/ne sho/e. 





DAKOTA 5AND5T0NE 



iQO 



Sandstone conta/^/nff many 

 fl/ant ren7o/ns. 



Fig. I 



