Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

165846 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 5120, results 127976 - 128000

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Map showing high-purity silica sand of Middle Ordovician age in the Midwestern states
Keith B. Ketner
1979, Miscellaneous Field Studies Map 1097
Certain quartz sands of Middle Ordovician age in the Midwestern States are well known for their purity and are exploited for a wide variety of industrial uses. The principal Middle Ordovician formations containing high-purity sands are the St. Peter Sandstone which crops out extensively from Minnesota to Arkansas; the Everton...
Generalized configuration of the bottom of the Floridan aquifer, Southwest Florida Water Management District
R. M. Wolansky, G. L. Barr, R. M. Spechler
1979, Open-File Report 79-1490
This map presents the configuration of the bottom of the Floridan aquifer in the Southwest Florida Water Management District. The bottom of the aquifer generally corresponds to the beginning of consistent intergranular evaporites occurring in either the Avon Park, Lake City, or Oldsmar Limestones of Eocene age. The altitude of...
Lake Ontario geological and geophysical data sources
Deborah R. Hutchinson, Richard J. Wold
1979, Miscellaneous Field Studies Map 1103
A bibliography of various geological and geophysical data sources was compiled as part of an overall effort to evaluate the status of research on the Great Lakes.  We hope that such a summary will be a catalyst for additional work and be an aid in planning future work.  Our presentation...
Discharge of saltwater from Permian rocks to major stream-aquifer systems in central and south-central Kansas
Anthony J. Gogel
1979, Open-File Report 79-1055
Saline-water inflow from Permian rocks has resulted in the degradation of freshwater systems in several areas of central and south-central Kansas. Solution of evaporite beds has occurred along the eastern edge of the Wellington Formation, chiefly within the Hutchinson Salt Member and associated gypsum units. The solution, caused by leakage...