Coleharbor Formation- River Sediment- Uncollapsed River Sediment (NDQcrf;0)

Moderately well sorted cross-bedded sand and plane-bedded gravel, including sediment of melt-water and other rivers; as thick as 30 meters (100 feet). Flat-bedded sediment of gently sloping plains and terraces, commonly with braided-channel scars.

State	North Dakota
Name	Coleharbor Formation- River Sediment- Uncollapsed River Sediment
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene Holocene
Original map label	Qcrf
Comments	Coleharbor Formation- Sandy, silty clay with pebbles of limestone, dolomite, granite, gneiss, and basalt; nonorganic, bedded clay, silt, sand, and gravel; as thick as 200 meters (600 feet).
Primary rock type	sand
Secondary rock type	gravel
Other rock types
Lithologic constituents	Major Unconsolidated > Coarse-detrital > Gravel (Glacial, outwash) Unconsolidated > Coarse-detrital > Sand (Glacial, outwash)
Map references	Clayton, Lee, 1980, Geologic Map of North Dakota: U. S. Geological Survey, Scale 1:500K.
Unit references	Clayton, Lee, 1980, Geologic Map of North Dakota: U. S. Geological Survey, Scale 1:500K.
Geographic coverage	Barnes - Benson - Bottineau - Burke - Burleigh - Cass - Cavalier - Dickey - Divide - Dunn - Eddy - Emmons - Foster - Grand Forks - Griggs - Kidder - LaMoure - Logan - McHenry - McIntosh - McKenzie - McLean - Mercer - Morton - Mountrail - Nelson - Oliver - Pembina - Pierce - Ramsey - Ransom - Renville - Richland - Rolette - Sargent - Sheridan - Sioux - Steele - Stutsman - Walsh - Ward - Wells - Williams