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Nonparametric tests for trends in water-quality data using the statistical analysis system
Charles G. Crawford, James R. Slack, Robert M. Hirsch
1983, Open-File Report 83-550
Two nonparametric procedures to test for trends in water-quality data (SEASKEN AND SEASRS) have been developed for the Statistical Analysis System* (SAS). The procedure SEASKEN tests for a monotonic trend in time by a modified form of Kendall's tau, the Seasonal Kendall test. The procedure SEASRS tests for a step...
Stratigraphy and paleontology of Mid-Cretaceous rocks in Minnesota and contiguous areas
William Aubrey Cobban, E.A. Merewether
1983, Professional Paper 1253
PART A: Molluscan fossils are locally abundant at outcrops of Upper Cretaceous rocks in eastern North and South Dakota, northeastern Nebraska, northwestern Iowa, and western and northern Minnesota. Other Cretaceous mollusks have been found in the glacial deposits in Minnesota, Iowa, and Illinois. The oldest well dated marine mollusks are...
Hydrologic conditions in the Wheatland Flats area, Platte County, Wyoming
M. A. Crist
1983, Water-Resources Investigations Report 83-4047
The area includes about 260 square miles in central Platte County that consists of Wheatland Flats and a border region. Wheatland Flats is an area of about 100 square miles that is bounded by Chugwater Creek on the east, the Laramie River on the north, and Sybille Creek on the...