Areas of Landslides Williston West Quadrangle, North Dakota · Areas of Landslides Williston West Quadrangle, North Dakota (OTTERTAIL CREEK) ( B L A C K T A I L C R E E K) (B O N

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Cartographic Compilat ion: E. L. Kadrmas & S.S. Kran ich

103o 45' 00"

48o 15' 00"

103o 37' 30"

103o 37' 30"103o 45' 00"48o 07' 30" 48o 07' 30"

48o 15' 00"

Areas of LandslidesWilliston West Quadrangle, North Dakota

(OTTER TAIL CR EEK) (BLACKTAIL CREEK)(BONETRAILL SE)

(TREN

TON) (WILLISTON SE)

(TREN

TON

NE)

(WILLISTON SW)

(WILL

ISTO

N EA

ST)

North Dakota Geological Survey24K: Wlst W - l

Edward C. Murphy, State GeologistLynn D. Helms, Director Dept. of Mineral Resources

Geologic Symbols

Known contact between two geologic units.

UNIT DESCRIPTIONS

QUATERNARY SYSTEM

RECENT/PLEISTOCENE

Geology Undifferentiated

T. 1 55 N.

T. 1 54 N.

R. 101 W.R. 102 W.

MN

1976 Magnetic North Declinat ion at Center of Sheet

14o

Williston West Quadrangle, North Dakota

Edward C. Murphy2012

Variable mixture of strata and deposits that have slid to the base ofsteep slopes.

Landslide DepositsQls

Landslides identified on this quadrangle were mapped from stereopairs, black and white 1:20,000 scale aerial photographs flownbetween 6-21-58 and 9-7-58. As a result these maps can be usedto identify areas that are vulnerable to slope failure, but are not anup to date assessment of all landslides for the area.

Other Features

Unpaved Road

Paved Road

US Highway(/2

0 0.5 1Miles

1:24,000Scale

Stand ard Paral lels 4 8o 07' 30" an d 48o 15' 00"

USGS 7.5 Min ute Topo graph ic Map Co ntour Interval 1 0 Feet

Lambert Conformal Conic Projection1927 No rth American Datum NGVD 1929

Road Layer Rectified to 2 003 NAIP Digi tal Orth ophoto