Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 244, part 3
The Relationship Between Geology and Landslide Hazards of Atchison, Kansas, and Vicinity--Table 1

Table 1. Description of the geologic units, based on data from Price (1896), Condra (1927), Ward (1973), R. C. Moore (unpublished data), and authorŐs field notes.

Age	Geologic unit	Thickness m (ft)	Description
Quaternary	alluvium	0-32 (0-105)	Tan, brown, and gray silt, sand, and gravel
	loess	0-12.2 (0-40)	Gray, clayey, sandy silt that weathers yellow to brown
	glacial drift	highly variable	This unit includes glacial till (gray, poorly sorted clay to boulders that weather brown), outwash deposits (tan to brown sand and gravel), and the "Nortonville clay" (gray to brown silty clays)
	Atchison formation	0-24.3 (0-80)	Tan to gray, silty sand to gravel
Pennsylvanian	Topeka Limestone Hartford Limestone Member	1.2 (3.8)	Gray, massive limestone that weathers yellow-brown
	Calhoun Shale	5.2 (17)	Gray, bluish- to greenish-gray, blocky to flaggy, interbedded siltstone and shale that weathers yellow-brown
	Deer Creek Limestone Ervine Creek Limestone Member	5.2 (17)	Gray to tan, wavy-bedded to massive limestone that weathers yellow-brown
	Deer Creek Limestone Larsh-Burroak Shale Member	1.5 (4.8)	Gray siltstone and shale, overlying black shale, siltstone, and coal
	Deer Creek Limestone Rock Bluff Limestone Member	0.6 (1.9)	Light- to medium-gray, massive limestone that weathers yellow- brown
	Deer Creek Limestone Oskaloosa Shale Member	2.3 (7.6)	Gray siltstone and shale with gray sandstone layers
	Deer Creek Limestone Ozawkie Limestone Member	0.9 (3)	Gray, massive limestone that weathers yellow-brown
	Tecumseh Shale	19.8 (65)	Gray to green-gray, interbedded shale and siltstone with yellow to tan sandstone
	Lecompton Limestone	0.4 (1.2)	Dark blue-gray limestone that Avoca Limestone Member weathers yellow-brown
	King Hill Shale Member	1.9 (6.2)	Bluish-gray silty shale
	Beil Limestone Member	1.6 (5.2)	Gray, shaly limestone that weathers yellow-brown
	Queen Hill Shale Member	1.5 (4.8)	Blue-gray, silty shale overlying black, fissile shale
	Big Springs Limestone	0.8 (2.6)	Gray to tan, massive limestone that Member weathers yellow-brown
	Doniphan Shale Member	1.9 (6.1)	Bluish-gray, bedded, silty to calcareous shale that weathers yellow-brown
	Lecompton Limestone	1.4 (4.7)	Two, gray to tan, massive limestone Spring Branch Limestone layers that weather yellow-brown, Member separated by a thin (15-cm), gray to tan shale; the shale may be absent
	Kanwaka Shale	11.1 (36.4)	Gray, bluish-gray to greenish-gray Stull Shale Member siltstone and shale and tan to gray sandstone; a discontinuous coal or black shale may exist above the sandstone; in some areas, the base is 20-cm (8-in) clay
	Clay Creek Limestone	0.8 (2.7)	Gray, massive limestone that Member weathers yellow-brown; the top may be marked by a red, thin, shaly limestone
	Jackson Park Shale	1.9 (6.1)	Gray, bluish-gray to green-gray, thinly bedded siltstone and shale with some sandstone layers; the unit weathers tan to brown
	Oread Limestone	0.8 (2.6)	Gray limestone; thin or absent in Kereford Limestone Member parts of the study area
	Heumader Shale Member	1.4 (4.7)	Gray to greenish-gray shale and silty shale that weathers brown
	Plattsmouth Limestone	6.2 (20.5)	Medium- to dark-gray, wavy-bedded Member limestone that weathers light-gray to light yellow-brown
	Heebner Shale Member	1.4 (4.5)	Dark-gray, fissile to platy shale and silty shale, overlying black fissile to platy shale
	Leavenworth Limestone Member	0.5 (1.7)	Dark-gray, massive limestone
	Snyderville Shale Member	3.8 (12.5)	Gray shale and silty shale
	Toronto Limestone Member	2.3 (7.5)	Light-gray to yellow-gray, massive limestone that weathers yellow- brown
	Lawrence Formation	7.6+ (25+)	Green-gray shale, red beds, and coal