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Flood profile study, Squaw Creek, Linn County, Iowa
Water Resources Division, U.S. Geological Survey
1968, Open-File Report 68-302
This report is the result of a cooperative agreement between the city of Cedar Rapids and the U.S. Geological Survey that provides for the collection of hydrologic data by the Geologic Survey on small streams in and near the city. The city furnished the large-scale topographic map showing a stream...
The geologic classification of the meteorites
Donald Parker Elston
1968, Open-File Report 68-97
The meteorite classes of Prior and Mason are assigned to three proposed genetic groups on the basis of a combination of compositional, mineralogical, and elemental characteristics: l) the calcium-poor, volatile-rich carbonaceous chondrites and achondrites; 2) the calcium-poor, volatile-poor chondrites (enstatite, bronzite, hypersthene, and pigeonite), achondrites (enstatite, hypersthene, and pigeonite), stonyirons...
Gold gradients and anomalies in the Pedro Dome-Cleary Summit area, Fairbanks district, Alaska
Robert B. Forbes, H.D. Pilkington, D. B. Hawkins
1968, Open-File Report 68-101
Anomalous gold values have been discovered in hydrothermally altered quartz diorite, quartz monzonite, and quartz mica schist at the head of Fox Creek; and in similarly altered quartz diorite in the Granite Creek area. Channel samples across some of these altered zones have produced anomalous gold values over widths which...