2 22 White on later Cretaceous deposits in Iowa. 
Sioux City, were recognized as belonging to the Dakota 
group; while the more northerly exposures ^verc referred to 
the next higher portion of the earlier Cretaceous. 
Besides these exposures of strata in situ numerous fragments 
and scattered fossils were from time to time found at different 
localities in the drift, some of which localities are much farther 
to the eastward than are any of the exposed strata referred to. 
These latter traces are so numerous and so widely distributed, 
and the known dips and trends of the older formations are such 
that, in my official report, I deemed it proper to represent a 
large part of western Iowa as o(!cupied by Cretaceous strata,' 
though mostly covered from sight by the abundant glacial drift 
which prevails there. 
Subsequent discoveries have tended to confirm the correct- 
ness of this view ; and even to extend the limits of the area in 
Iowa which may be properly regarded as now, or as having 
formerly been, occupied by Cretaceous strata." These later dis- 
coveries have been mainly, not of strata in situ, but of such 
fragments of fossiliferous strata, and of separate fossils, in the 
drift of that region, as have just been referred to. Many of 
these specimens are so soft or so fragile; or they have suffered 
so little attrition, as compared with that which the transported 
material associated with them in the drift has suffered, that it 
seems necessary to assiune that those specimens were not trans- 
ported to any considerable distance from the place of their 
original deposition. An account of one of these discoveries was 
published by me several years ago,^ and the primary object of 
this article is the announcement of another. 
A short time ago Prof. Erasmus Haworth of Penn College, 
Oskaloosa, Iowa, informed me of the discovery of a mass of fos- 
sil-bearing rock in the digging of a well in the drift of Hardin 
county, Iowa.* He recognized these fossils as of Cretaceous 
^ See White, C. A., Geology of Iowa, vol. i, p. 287; geological map in 
vol. ii, and geological map-model, vol. i, facing page 32. 
- See also accounts of the discovery of Cretaceous deposits at numer- 
ous localities in southern Minnesota in Winchell's Minnesota reports. 
•^ See White, C. A., on the eastern limit of Cretaceous deposits in Iowa. 
Proc. A. A. A. S., vol. xxi, p. 187-193. 
*The locality given by Prof. Haworth is, Sec. 17, township 86 N., range 
3o west of the 5th, P. M.; which is not far from the center of the state. 
