Geologic map of the Mount Eddy and Castle Crags Roadless Areas, Shasta, Siskiyou, and Trinity counties, California
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Miscellaneous Field Studies Map↗
Geology topics
M.L. Throckmorton
Publications and source records attributed to M.L. Throckmorton.
Preliminary geologic map of the Purgatory Canyon Quadrangle, Mohave County, Arizona
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Miscellaneous Field Studies Map↗
Mineral resource potential map of the Turbinella-Gambel Oak Instant Study Area, Mohave County, Arizona
No abstract available.
Arizona↗
Contact-metasomatic magnetite deposit, Medfra Quadrangle, Alaska
A small contact-metasomatic magnetite deposit was discovered in the Medfra quadrangle, Alaska, in 1976. It occurs at the contact between a Cretaceous or early Tertiary quartz monzonite stock and Paleozoic limestone and dolomite. The ore is a magnetite-clinohumite-hematite rock that contains up to 60 volume percent magnetite and 76 weight percent total iron expressed as FeO. Computer modelling of data derived from a ground-level magnetometer survey yielded an estimate of the shape and volume of the deposit. The volume is grossly estimated at 11,600 3 m .
Alaska↗