RESEARCH· ·1970·

s
FEET
50
SCOTT AND LLNDVALL
N
FEET
50
B145
40
30
20
8 horizon
~Manganese-stained pocket
40
30
20
10
0
A
Alluvium contains deformed silty clay layers
Giant bison found here
45 .±: feet loose or semicompacted
sand containing stones as much as
10 inches in diameter
s
N
FEET
FEET
50 Windblown sand (1 ft) 50
40 40
10
0
30 30
20 20
10 10
40- to 45-foot-high terrace
B
0 ~--------------------------------------------------------------------------------------------~ 0
FIGURE 4.-Diagrams showing stratigraphy of Louviers Alluvium at Parker bison locality. A, Northern cut along
west side of Cherry Creek south of Arapahoe Road (Colorado Highway 88) and south of Cherry Creek
Reservoir. B , Southern cut along west side of Cherry Creek.
The Louviers Alluvium (Scott, 1960) near Parker,
Colo., consists of two parts. The lower part, 34 feet
thick, is composed mainly of stratified coarse sand containing
pebbles, cobbles, and boulders (fig. 6), the
upper 4 feet of which is yellowish-brown to brown
pebbly silty sand. The upper part, 8 feet thick, con-
sists of pale- to dark-brown thick-bedded silty sand.
The lower part is characterized by abundant pieces of
opalizecl wood from the Dawson Formation of Cretaceous
and Paleocene age and ash-flow tuff of Oligocene
FIGURE G.-Generalized geologic map of Parker bison locality.
FIGURE 6.-Southern part of eroded terrace, showing Louviers
Alluvium at Parker bison locality. C, Cea, and Sea, soil horizons;
G, gley soil. Loess and underlyine A horizon are not
designated.