88 The American Geologist. August, i9ub 
ence flint. Numbers 4 to 7 represent the Fort Riley lime- 
stone, of which 33^ feet are shown in the section. In 
Beede's section at Oketo* the top of the Matfield is shown 
in the ravine just north of the depot. The thickness of the 
Florence flint is given as 17 feet and the total thickness of 
the overlying Fort Riley limestone is given as 37 feet. 
Passing down the Big Blue river to MarysvHle we find 
the same general conditions repeated. In the northern 
part of the town 11 feet of the top of the Matfield forma- 
tion followed by 20 feet of the Florence flint and 26 feet of 
the Fort Riley limestone are exposed, as shown in the fol- 
lowing section : 
MARYSVILLE SECTION. 
10. Limestone, thin bedded, disintegrated 2+ ft. inches 
9. Limestone, brownish with fragments of pelecy- 
pods 2 " 6 " 
8. Limestone, thin bedded, light colored grading 
into shale 3 " 9 
7. Limestone, cellular, with iron streaks and stem- 
like marks 3 " 9 
6. Limestone, cellular 5 " " 
5. Marls and clayey shales with brachiopods and 
bryozoans 9 " " 
4. Limestones with layers of chert and chert 
concretions, including a two foot layer of 
soft limestone below the chert. Aviculip- 
inna at the top of the flint 20 " 
3. Shale, soft, gray and fossilferous " 6 " 
2. Limestone 2 " 6 " 
1. Shales, red and blue, carbonaceous in places, 
with plants 8 " 
Total 57 ft. inches 
Numbers 1-3 belong to the Matfield formation, number 
4 is the Florence flint and 5-10 are classed with the Fort 
Riley limestone. 
Number 3 is a quite fossiliferous calcareous shale as is 
number 5. The latter seems to be more nearly related to 
the Fort Riley limestone lithologically, that is, it seems to 
grade into the limestone laterally more than into the flint, 
and is classed with it. Bryozoa and Brachiopods are the 
dominant fossils of this layer. Th^ individual layers of the 
J Paper cited above. 
