296 MgIE, J OOKINAIE, (NE CLR OL OGM. 
the granular limestones are seen underlain by the brecciated 
limestone and this by brown magnesian limestone in which 
Lithostrotion canadense was found. This bed is arenaceous in 
appearance and is locally termed a sandstone. ; 
On the Des Moines River, about a mile below Belfast, the 
calcareous sandstones represented by No. 2 of the Keokuk and 
Warsaw sections are twenty to twenty-five feet thick and change 
locally to blue arenaceous shale. About a half mile east of this 
locality, a quarry shows the following arrangement: 
IV. SECTION AT DEAMUDE’S QUARRY. 
I. Clay, yellow above, red below, - S - - - 6’ 
2. Brecciated limestone with pockets of green clay, - - 20' 
3. Hard blue limestone varying to blue arenaceous shale or shaley sand- 
stone, - - - - - - - - By 
4. Sandstone, blue calcareous, varying locally to arenaceous shale ; 
quarried, - - - - - - - - 8’ 
5. Blue shale, : - - - - - - 15’ 
a 
Some closely related exposures on a small creek about a mile 
west of Belfast are especially instructive. Beginning near the, 
mouth of the stream and following up its course the following 
sections were taken a quarter of a mile apart. In the intervening 
spaces, the rocks are not exposed. 
V. SECTIONS NEAR BELFAST. 
JN, 
1. Concealed. 
2. Sandstone, blue, weathering brown; somewhat thin bedded and 
micaceous in places; corresponds to the sandstones below Belfast, - 15’ 
3. Blue argillaceous shale ; no geodes, - - - - - 5/+ 
20’-+- 
Bs 
1. Concealed. 
2. Brecciated limestone ; light-colored, - - - - 8’ 
3. Brown magnesian limestone, concretionary, some layers more com- 
pact; blue, - - - - - - - Sv mule 
4. An irregular bed of fragmentary limestone and shale, more or less 
arenaceous, - - - - - - - - 6’ 
5. Blue argillaceous shale, equivalent of No. 3 above, - - - 
