vaughan] UPPER CRETACEOUS FORMATIONS. 23 
Section in the Maverick County Coal Company* s mine, near Eagle Pass, as given by Mr. 
George Bregg, former manager of the mine. 
Feet. 
7. Sandstone 50 
6. Clay 60 
5. Sandstone 4 
4. Coal 2 
3. Clay 94 
2. Coal (worked seam) 6 
1. Sandstone 14 
Total 230 
Fig. 2.— Section of hill on east side of Elm Creek, 1 mile above the bridge at the crossing of the 
Del Rio and Eagle Pass road. 
Section oj aill on east side of Elm Creek, 1 mile above the bridge at the crossing of the Del Rio 
and Eagle Pass road. 
Feet. 
7. Soft, fine-grained, irregularly bedded sandstone, containing curious elongate 
tube-like bodies, which stand with their long axes vertical to the stratifica- 
tion planes 30 
6. Unexposed gravel-covered slope, the gravel in yellowish sand 14 
5. Coarse brown or yellowish sandstone, sometimes with white blotches and 
containing fossil wood 5-6 
4. Sandy slope, a little gravel on the surface 45 
3. Alluvial terrace of creek, lower rocks unexposed, alluvium probably under- 
lain by sandstone - - 15 
2. Creek bank, soft, cross-bedded sandstone, with ferruginous concretions 5 
1. Yellow clay to bed of creek 2 
Total 117 
Above the cla3 T apparently the whole section is composed of sand- 
stone like that at the surface in the shaft of the Maverick County Coal 
Company's mine. 
Along Elm Creek, above the bridge, irregularly stratified sandstones 
and clays containing ferruginous concretions and silicitied wood are 
exposed. There is no constancy in the small beds of sand and clay; 
they are simply interlocking lenses. 
At the old Hartz mine the coal is about 6 feet thick and is both 
overlain and underlain by clays. From the lays above the coal a 
specimen of the palm Geonomites tenuirachis Lx. — determined by Prof. 
F. H. Knowlton to be a Laramie species, as it occurs in the coal- bearing 
Laramie of New Mexico — was collected. 
