Geological History of the Ozark Uplift, — Broadhead. 13 
are the Lower Magnesian limestones, indicating a rapid rising 
on the west; the same remarks will apply to the northern flank 
along the Missouri river, excepting that the base rock in sight 
is generally the Second Magnesian limestone as far west as 
Boone county. 
Around the western margin the Lower Carboniferous gen¬ 
erally rests upon the Magnesian limestone series, while only a 
few miles on the west, are the Coal Measures. 
Around the northern and western margin of the plateau, we 
find, through Warren, Montgomery, Callaway, Boone, Page,. 
Cole, Morgan, Pettis, Moniteau, Cooper, Benton, Cedar and 
Jasper, occasional isolated deposites of coal chiefly impure 
varieties of cannel or bituminous. These so-called “pockets” are 
almost invariably dipping at a certain angle, whereas the coal 
beds of the state in their proper place are nearly or apparently 
horizontal. These pockets are rarely of any great extent hori¬ 
zontally, but may be 5, 10, 30 or nearly 100 feet thick, and 
often of no greater dimension in any other direction. Cannel 
and bituminous are often found in the same pocket. Organic 
remains are extremely rare, but we more often find with the 
coal small deposites of pyrite or sphalerite, and sometimes even 
galena. Many of these deposites occur in side valleys tributary 
to larger ones and about directly against Lower Carboniferous 
or Magnesian limestone strata. These beds often are found 
high up in the hills adjacent, while the coal reposes at the foot,, 
but in no case do they overlie the coal. 
Certain of these pockets occur at the lead mines of Webb 
City and Joplin, and it would seem that their disturbance was 
in a measure coincident with the formation of the ores of these 
mining districts. These facts showing the Ozarks to be at a 
greater elevation above the sea than the country east, north and 
just west, would indicate their age. The rocks are all older 
than those in the districts east, north, west and south, although 
the latter occupy a lower level above the sea. Facts also indi¬ 
cate a gradual rising up of the whole plateau at a period subse¬ 
quent to the deposite of the Carboniferous strata. 
