CAHABA COAL FIELD: HRNRYELLEN BASIN. 29 
(Poole seam in S. F. 14 of N. W. M, section 1?, township 18, S., range 2, 
W. Direction of erie: N.E.and 8. W. Direction of dip, S. E. 
Rate of dip, 5°}. 
——— THINLY LAMINATED SfNOSTONE 
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WincHes COAL 
SANDSTONE 
The topography of the Henryellen basin very much re- 
sembles that of the portion of the Cahaba Coal Field, near 
Helena. 
The great Millstone Grit formation, here as well as there, 
forms three high prominent ridges; Rocky Ridge the first 
one, contains the lowest of the measures, the second or 
middle one is the Flat Ridge or Black Jack Ridge, the third 
one is Grassy Ridge. These three are continuous (except 
where cut through by creeks and branches) all along the 
northwest side, and the northeast end of this basin. To 
the scutheast of Grassy Ridge, and dividing the waters of 
Far Black Creek from Middle Black Creek, there is another 
high ridge that is designated by the settlers in its neighbor- 
hood as Owen’s Mountain. This ridge follows parallel with 
Grassy Ridge all along the north end of the basin. 
Dividing the waters of Middle Black Creek from the 
waters of Near Black Creek is another ridge that has the 
name of Sandstone Ridge, given it by the settlers. These 
ridges form the principal features in the northwest half of 
the Henryellen basin. 
In the southeast half of the basin the ridges are generally 
low, the land mostly undulating ; the most prominent land 
mark to be seen from this part of the field being the high 
cherty ridge, just outside of the basin, and following par- 
allel with the boundary of the coal field on that side. 
Black Creek, with its numerous prongs, drains the north 
