340 
The American Geologist. 
June, 1891 
MEGALONYX-BEDS IN KANSAS. 
J. A. Udden, Rock Island, 111. 
Over parts of the western plains there are found deposits con- 
sisting of gravels, sand, volcanic dust, and loam, which have been 
regarded by some as belonging to the Quaternaiy age, and by 
others as belonging to the Pleiocene.* Having some time ago 
found such deposits in the central part of Kansas, and having ob- 
served some features in them that may be of interest, I venture to 
offer the following notes on their occurrence in McPherson county, 
Kansas. 
f mtM ] RAWLINS ; 0ECATUR 
Jsherman: th0MA3 : sheridak 
RlpUBLICi WASH-! e*^! jj^j ««*'*/ DONG'S 
NORTON : PH,LUP8 ! SMITH :« WEL Hl[ !|NGT0n!# ^ jf ^ 
" S8N!5f- 
' 'So , 
graham! iosborne %! CLOUD 
• rooks i :____i<j 
_^ rs !0TTAWA 
..NCOuC^ 
TREGO i B u L ' a iRUSSELL: ■> 
~£f^^r'~ '• sa 
■Jtzver, p^.; ^i_ ""yfflORRISi 'OSAGE; ^> . 
s: Rnmrr BTR7oTv2^ J MIAM1 
rrfls ! Marion^ ^~^% i S^ — 
;chase;_ !coS£{y: ^ Ilinn 
'BARTON' 
^^HICE- 
! -4J? 
J>'. 
&*? 
-r^ 
*W i 
R E 
^<K^ARVEY ! 
sP 
\\&.\ 
> .wooo- 
WILS0N r 
J'CRAW- 
I ^ | f I N N E Y ( 
[* /^ jF R 0; KIOWA | PRATT .KINGMAN \4> 
" ^^J^^^J BARBER j HARPERJ SUMNER^V C^TAU ]f^/^j 
MAP OF KANSAS 
The heavy line represents the course of the water-shed between the Kansas and the Ar- 
kansas systems ; the shaded part represents the ancient trough crossing it. (Am. Geolo- 
gist, vol. 5, p. 67.) 
The eastern border of the Dakota sandstone runs in the general 
direction from the southwest to the northeast through the central 
part of the state. With its wide fringe of scattered outliers it 
makes the most rugged topograph}" in the state. Such topography 
is well adapted to preserve remnants of later materials imposed 
upon it. In the belt of Dakotan outliers referred to, there is a 
trough-like depression several miles wide and perhaps fifty miles 
*0. St. John. Fifth Biennial Report of the State Board of Agriculture, 
pp. 146-151. — F. W. Cragin, Bulletin of the Washburn College Labora- 
tory, March and April, 1885.— R. T. Hill, Texas Geol. and Sci. Bulletin: 
Austin, Oct., 1888; The American Geologist, Jan., 1890. — Robert Hay, 
Sixth Biennial Report, Kansas State Board of Agriculture, p. 104. — E. 
D. Cope, Tertiary Vertebrata, p. 4 — Dr. Samuel Auglxey, Physical Geog- 
raphy and Geology of Nebraska, 1880. — Prof. J. E Todd, Science, April 
23, 1886. Proceedings of the American Association for the Advancement 
of Science, Vol. XXXVII. 
