M 



OUACHITA, MARATHON, AND COAHUILA SYSTEMS 



M 



r cd , -? ct j 



GLASS MOUNTAINS i 

 I 

 I 



MARATHON ANTICLINORIUM 



DUOOU 



T CREEK THRuTF g^-Tgfg ..€.0^1 



7 



233 



M' 



Ct 



J^' DAGGER FLAT ANTICLINORIUM 



ARDEN DRAW 

 vx\ '^> \\. THRUST v 



Ct Dc r ->\ \ jQ\ ^ Cd 



HELL'S 



^ V. 



€d-J 



HALF ACRE V ^\\ ^ J Kf 

 >T * x > "^i 



TRES HERMANAS MTN. 

 Kt 



M 



Kf 



Kt 



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10 



—I 



HORIZONTAL AND VERTICAL SCALE IN MILES 



| Fig. 14.9. Cross section of Marathon uplift and Permian basin. Taken from King (1937, PI. 23, 



1 section B-B'). Cd, Dogger Flat sandstone (Cambrian); O, Maravillas chert, Woods Hollow shale, 



Fort Pena formation, Alsate shale, and Marathon limestone (Ordovician); De, Caballos novaculite 



(Devonian ?); Ct, Tesnus formation, Cd, Dimple limestone, Ch, Hamond formation, and Cg, 



landmass to the south or southeast and accumulated in a sea whose shore 



lines moved back and forth, but the propriety of calling the basin of depo- 



I sition of that time a geosyncline with only 1500 to 3100 feet of sediment 



i has been questioned (Sellards and Baker, 1934). Deep wells have enabled 



Barton ( 1945) to diagram the extent of the pre-Pennsylvanian deposits 



Gaptank formation (Pennsylvanian); Cwc, Wolfcamp formation, CI, Leonard formation, Cw, 

 Wood formation, and Cc, Capitan limestone (Permian); lb, Besset conglomerate (Triassic ?); Kt, 

 Trinity group, and Kf, Fredericksburg group (Lower Cretaceous). 



with more detail than heretofore. See Fig. 14.10. He shows that the axis 

 of the basin was considerably north of the later Pennsylvanian, and also 

 that the basin was too shallow to deserve the name geosyncline. 



In both of the regions, the deposits of Carboniferous time attained a 

 great thickness, possibly over 20,000 feet in the Ouacbitas and 12,000 or 



App. loo Miles ■ 



SITE OF LATER 

 'MARATHON MOUNTAINS 



LL ANOBIA 



M/ss/ss ippign hj 



Woodford sh. 



Tpyrpyr_.. 



\ AA /_\ A A S^STT^Ty^^'^ 6 

 a A a a A a A a a A aaa/ 



\aaaaa/\aaaaaaa"aa~aaaa/ \ a/ "\~a~a~7 \A7 \~7 <7 \~/\~ www \";\"/\"a"/\"/ "/ \~V\7 \i \i \7 v> ~i \/~/\/\/\/ \i \7 \~> \7 \> \7 \7 \~ \7 \7 v/ \~> \~ \~ \~ \~ \ 



A A A A A /_\ A AM / 



v A A A '_> A A <_> <_y_> 



A A A A A A A A A / 

 \ A A A A A A A A A 

 A A A A / \ A A AA / 

 \ A A A AA A A A A 

 A A A. A A A A A A / 

 \ /_\ A A A A A A A A 

 / \ A A / \ A A A A A / 

 \ A A A A A A A A A 

 A A/ \A A A Aa A/ 



Fig. 14.10. Pre-Pennsylvanian basin of deposition in the region of the Marathon Mountains, 

 after Barton, 1945. The section extends approximately north-south through the Marathons and 



into the Delaware basin, and restores the strata diagrammatically to their pre-Pennsylvanian 

 condition. 





