Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls Qls ( / 2 1804 1804 Cartographic Compilation: E. L. Kadrmas & S.S. Kranich 103 o 37 ' 30 " 48 o 15 ' 00 " 103 o 30 ' 00 " 103 o 30 ' 00 " 103 o 37 ' 30 " 48 o 07 ' 30 " 48 o 07 ' 30 " 48 o 15 ' 00 " Areas of Landslides Williston East Quadrangle, North Dakota (BLACKTAIL LAKE SE) (SP RING BROO K) (OTTER TAIL CREEK) (WILLISTON SW) (LA K E JES SIE) (WILLISTON WEST) (WILLISTON SE) (STOC KY ARD CREEK) North Dakota Geological Survey 24K: Wlst E - l Edward C. Murphy, State Geologist Lynn D. Helms, Director Dept. of Mineral Resources R. 100 W. R. 101 W. T. 155 N. T. 154 N. Other Features US Highway ( / 2 State Highway 1804 Paved Road Unpaved Road MN 1976 Magnetic North Declination at Center of Sheet 13 o 30' Williston East Quadrangle, North Dakota Edward C. Murphy 2012 Geologic Symbols Known contact between two geologic units. UNIT DESCRIPTIONS QUATERNARY SYSTEM RECENT/PLEISTOCENE Geology Undifferentiated Variable mixture of strata and deposits that have slid to the base of steep slopes. Landslide Deposits Qls Landslides identified on this quadrangle were mapped from stereo pairs, black and white 1:20,000 scale aerial photographs flown between 6-21-58 and 9-7-58. As a result these maps can be used to identify areas that are vulnerable to slope failure, but are not an up to date assessment of all landslides for the area. 0 0.5 1 Miles 1:24,000 Scale Stand ard Parallels 48 o 07 ' 30 " and 48 o 15 ' 00 " USGS 7.5 Min ute Topo graph ic Map Con tour Interval 1 0 Feet Lambert Conformal Conic Projection 1927 North American Datum NGVD 1929 Road Layer Rectified to 2003 NAIP Digital Orthophoto