MAGNETIC VECTOR STUDY IN OIL STATES 27 
An interesting feature is the indicated high trend between D’Olive 
Bay-Mobile-Lucedale on the south and Bay Minette-Citronelle- 
Leakesville on the north. This trend is parallel with the Hatchetigbee 
anticline, about 50 miles farther north. 
The Hatchetigbee anticline is not indicated by the vectors, be- 
cause the stations are not favorably located. It is parallel with another 
magnetic high trend about 30 miles farther north, extending from 
Butler toward midway between Grove Hill and Pine Hill. This last 
trend is known from magnetometer work in combination with the 
vector map. 
It seems, therefore, that there are three, parallel pronounced anti- 
clinal trends, south of, and practically at right angles to, the Appala- 
chian trend from Guntersville to Greensboro. 
In the writer’s opinion, the three anticlinal trends in southwestern 
Alabama represent a mountain system distinctly different from the 
Appalachians. If the Appalachians extend farther than Greensboro 
and Linden, they are expected to disappear below the anticlinal trend 
at Butler. It is further suggested that the three anticlinal trends in 
southwestern Alabama possibly represent an eastern extension of the 
Ouachita Mountain system, inasmuch as the high trend at Butler 
might be followed through Philadelphia-Koskiusko-Greenwood-Rose- 
dale into the Ouachita Mountains, and the high trend at Mobile 
through Ellisville-Fayette-Winnsboro-Bastrop-Hamburg-Star City. 
In the northern part of Alabama we observe a pronounced mag- 
netic high trend Hamilton-Double Springs-Cullman. This trend seems 
to join the high trend Guntersville-Greenboro, and to extend east- 
ward between Stevenson and Fort Payne. In the writer’s opinion, the 
trend north of Fort Payne to Hamilton is representative of the main 
Appalachian trend, whereas the trend Guntersville-Greensboro is a 
southwestward extension, branching off the main trend at Gunters- 
ville. 
A possible westward continuation cf the main trend of the Ap- 
palachians seems obscured by the magnetic influence of the Cin- 
cinnati uplift, which is indicated in the northeastern corner of Mis- 
sissippi by the “high” at Iuka. On the basis of magnetics only, we 
might suspect a high trend from Oxford toward a location midway 
between Helena and Tunica, with a westward continuation toward 
Brinkley and the Arkansas Valley. A continuation of the Arkansas 
Valley magnetic high trend into Oklahoma might be suspected south 
of Muskogee-Guthrie-Kingfisher-Watonga. 
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