Geological Surveys Database

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1959, Illinois State Geological Survey
Development of significant oil production from erratic sand lenses in the Ste. Genevieve carbonate sequence some 20 mi. N. of other production in E.-central Illinois has generated new interest in oil possibilities along the northern rim of the deep part (Fairfield basin) of the Illinois basin. The...
2018, Pennsylvania Geological Survey
Solferino, up until then the largest battle in mid-nineteenth-century Europe, was the decisive war-winning clash in one of the wars for Italian unification. Gettysburg, four years later, was the turning-point battle in the American Civil War. The focus of each battle was taking a high ridge near...
[19??], Nevada Bureau of Mines and Geology
1964, Illinois State Geological Survey
The value of minerals produced in Illinois in 1963 amounted to 615 million dollars. A record high value of 631 million dollars was established in 1962. Illinois minerals include coal, oil, stone, sand and gravel, fluorspar, lead, zinc, and other items such as clay products, cement, and lime. The...
1961, Illinois State Geological Survey
Interpretation of electric logs is made difficult by the presence of conductive solids in a formation, and it is therefore desirable that the mechanism of the conduction be fully understood. This discussion concerns the theory and measurement of surface conductance, the condition that is mainly...
1961, Illinois State Geological Survey
The effect of outdoor storage on the properties of steam coal was studied, using a high-volatile C bituminous coal from St. Clair County, Illinois. One portion of the coal was stored in summer, another portion in winter. Procedures used and results obtained are described. Ash, volatile matter, and...
1960, Illinois State Geological Survey
A five-fold increase in energy consumption has occurred in the United States since 1900. Population has increased to 2 1/3 times its 1900 level, and average per capita energy consumption is equivalent to more than nine tons of coal per year, compared to about four tons 60 years ago. Because of...
1960, Illinois State Geological Survey
Coke made in a pilot-oven from petroleum coke blended with Illinois coals tended to be somewhat larger and heavier than the coke made from Illinois and low-volatile Pocahontas coals. The best pilot-oven coke was produced from blends including 15 to 20 percent petroleum coke. Tumbler tests indicated...

About the Geological Surveys Database

As of July 2018, the Geological Surveys Database replaces the Critical Issues Research Database, providing an improved portal for decision makers and others to locate and comprehensively search state geological survey publications and U.S. Geological Survey factsheets.

The Geological Surveys Database is now an external database that has be integrated into AGI's Critical Issues webpages. To use the entire suite of features of the Geological Surveys Database, please visit

The Geological Surveys Database provides full-text searching of publications meaning that users can not only search metadata fields (i.e., title, author, notes, etc.), but also search against the entire text of the publications in the database in order to find the information they are seeking. The database also features interactive geographic searching of publications that have geographic coordinates, browsing of publications, faceted searching, and more.

Record display views include robust metadata that is based on a combination of GeoRef metadata that is supplemented with additional metadata from the state geological surveys and U.S. Geological Survey, links to state geological survey websites, suggestions for similar items, and a map display of associated geographic metadata coordinates.

The Geological Surveys Database also provides a wide array of user features including the ability to export citations, create user accounts to save queries, citations and create curated lists, add comments and custom tags to records in the database, and more.

The Geological Surveys Database is a collaborative effort between the American Geosciences Institute and U.S. state geological surveys to help increase the discoverability and use of geological survey publications by decision makers as they address issues at the intersection of the geosciences and society.