Marmarth Bentonite deposits, Marmarth, Slope Co., North Dakota, USAi
| Regional Level Types | |
|---|---|
| Marmarth Bentonite deposits | Deposit (Inactive) |
| Marmarth | City |
| Slope Co. | County |
| North Dakota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° North , 103° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:
Deposit (Inactive) - last checked 2019
Köppen climate type:
A bentonite deposit located a few miles north of Marmarth.
Bentonite near Marmarth was first reported by Frye (1967) to occur in the lower portion of the Ludlow Formation (Frye used the term Tullock) approximately 4 miles northeast of Marmarth in secs. 4 & 5, T133N, RI05W. Subsequent workers have placed this bed in the Hell Creek Formation, approximately 14 feet below the Hell Creek/Ludlow contact. The Marmarth bentonite is actually two bentonites separated by 5 to 16 feet of tuff. The upper and lower bentonites are approximately 2 and 6 feet thick, respectively. An evaluation of outcrops in this area indicates that the Marmarth bentonite is restricted to the northeast quarter of section 5 and the south half of section 4. Frye (1967) traced the bentonite into sections 3 and 9 in this same township indicating that it may have an areal extent of up to 5 square miles.
Regions containing this locality
| North America Plate | Tectonic Plate |
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References
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Year (asc) Year (desc) Author (A-Z) Author (Z-A)Frye, C.I. (1967), The Hell Creek Formation in North Dakota, unpublished PhD thesis, University of North Dakota, 411 p.
Murphy, Edward C. (1995), North Dakota Clays, A Historical Review of Clay Utilization in North Dakota, North Dakota Geological Survey, Miscellaneous Series No. 79: 10.
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