J. H. Kloos—Oretaceous Basin in the Sauk Valley, 23 
and I obtained some pretty fair casts and parts of the shells, 
which will be mentioned farther on, in a note by Mr. Meek. 
When last heard from, the well had a depth of 55 feet, and a 
boring had been sunk to a further depth of 25 feet. The fol- 
lowing section is a nearly accurate description of the strata 
traversed 
8 feet gravel and sand. 
30 “ dark blue laminated clay. Fragments of Inoceramus pro- 
blematicus and crystals of gypsum. 
8 “ clay and hard sandy shale of alight blue color, with pyrites, 
mica and fish scales. Cast of Znoceramus, At 40 feet 
a thin seam of lignite. 
10 “ same clay with more shale 3 to 4 inches thick. Shells of 
Inoceramus and Scaphites in the shale having retained 
their original color and pearly luster. In 50 feet an- 
other seam of lignite. 
15 “ dark blue clay without shale; color darker than the clay 
above and turning almost black. At 65 feet a hard 
shale of a grayish black color had to be drilled through. 
10 “ clay with thin layers and seams of pyrites. 
As this boring is commenced at an elevation of 80 feet above 
the leve] of the base, communicating with the Sauk river, we 
are on nearly the same level with the prairie at Richmond. — 
a slough, having an outlet to the lake, at the foot of the hills, 
the blue clay lies near the surface. 
The locality which furnished me the fossils is two miles 
south of Richmond, in continuation of the line of our profile. 
The formation here has probably a thickness of several hun- 
dred feet. : 
The following note in regard to the fossils already mentioned, 
is from Mr. F. B. Meek, to whom they were submitted : 
Mr. Kioos—Dear Sir: The specimens sent by you from near 
Richmond, Minnesota, were duly received. consist of casts 
of Inoceramus problematicus, impressions apparently of Ammo- 
nites percarinatus, scales of fishes and a small shark tooth allied 
to Corax or Galeus. Among the drawings also sent by you, 
there is one of the inner volutions of Scaphites larviformis, or 
Missouri; and it is very desirable that the eastern pecniat O 
this group of rocks should be traced out as accurately as possible, 
