Written items, especially those that are official, factual, or informative, often including graphics as well as text.
Distribution of high-temperature (>150 °C) geothermal resources in California [ More info] Description and map of geothermal resources in California.
Divisions of geologic time-major chronostratigraphic and geochronologic units [ More info] Revised geologic time scale indicating the ages of the lower bounds of chronostratigraphic and geochronologic units as they are currently known. Modifications to those ages made since the previous time scale was released (2007) are clearly marked.
Dragonflies and damselflies (Odonata) of the United States [ More info] Manual on dragonflies and damselflies (Odonata), with links to photo thumbnails, checklists, distribution maps, and other Odonata information.
Earthquakes [ More info] Online booklet on earthquake history, earthquake occurrences, measuring earthquakes, causes, relationship of volcanoes and earthquakes and earthquake prediction.
Energy and Minerals Science at the U.S. Geological Survey [ More info] Explains the purposes and goals of USGS research and monitoring activities that focus on energy and mineral resources and the potential problems that may result from exploitation of those resources.
Environmental health science at the U.S. Geological Survey [ More info] Explains the USGS strategy for research directed towards preventing or reducing the adverse impacts of toxicologic and infectious disease.
Erosion in the Rio Puerco: geography and processes [ More info] Paper on the accelerated erosion of the Rio Puerco, a tributary of the Rio Grande in New Mexico, which has deepened and widened its channel, or arroyo, since the settlement of the region.
Eruptions of Mount St. Helens: past, present, future [ More info] Online booklet on the 1980 eruption of Mount St. Helens, past history, and future hazards.
Executive summary, workshop: seismic and tsunami hazard in Puerto Rico and the Virgin Islands [ More info] Summary of workshop with links to reports that are recommendations for future projects.
Extent of Pleistocene lakes in the western Great Basin [ More info] Map of Pleistocene pluvial lakes in the western Great Basin (Nevada, eastern California, southern Oregon). Includes metadata, online PDF map view, and downloadable ArcInfo export files, ArcView shapefiles, and TIFF files.
Alphabetical Index of Topics
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