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Publication Extents

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Dissolved solids, hardness, and orthophosphate of surface-water runoff in the Northwest Florida Water Management District
J.E. Earle
1976, Water-Resources Investigations Report 76-16
This atlas consists of three maps that show the general distribution of dissolved solids, hardness, and orthophosphate in the streams and lakes within the Northwest Florida Water Management District. The atlas was prepared in cooperation with the Water Management District to provide pertinent water-quality information relating to the objectives of...
The karst landforms of Puerto Rico
Watson H. Monroe
1976, Professional Paper 899
Puerto Rico has a great variety of landforms developed by solution of limestone under tropical climatic conditions. Karst topography is present in most parts of Puerto Rico where limestone crops out, but it is more highly developed in the northern and northwestern parts, which are underlain by thick limestone formations of Oligocene and Miocene age....
Platinum deposits of the Goodnews Bay district, Alaska
John Beaver Mertie Jr.
1976, Professional Paper 938
Platinum placers were discovered in 1926 in a small area south of Goodnews Bay, in southwestern Alaska. Beginning in 1927, the placers were worked for 7 years by small-scale mining methods; in later years dragline excavators and a dredge were utilized. These deposits are important, not only because they are...