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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Publications in the fields of geology, geoscience, hydrology, mineralogy, paleontology, sedimentology, petroleum, meteoritic, oceanography, biology, natural history, archaeology, seismology.
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Find Out More »  |  Open Resource  |  2009/08/13  |  500 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

World Economic Forum Global Risks Report 2016, indicates that water crises are one of the three biggest challenges we face. A new study has backed up these findings, estimating that 4 billion people or two-thirds of the global population are facing water scarcity.

This figure is bigger than previously thought(?). In the past, studies looked at water scarcity on an annual basis. They concluded that between 1.7 billion and 3.1 billion people were affected. This latest study instead examined water scarcity on a monthly level, which gives a more accurate reflection of just how severe th... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

AAPG member archives search portal. Also, register for WINDS technical publications (AAPG Bulletin and Special Publications, SEPM Journal of Sedimentary Research, GCAGS Transactions, and Journal of Petroleum Geology).
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

This monthly review goes to AGI's member societies, the AGI Government Affairs Advisory Committee, and other interested geoscientists as part of a continuing effort to improve communications between GAP and the geoscience community that it serves.

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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Sarah Rafique reports that HPWD measures 1,400 wells annually in a 16-county service area to monitor groundwater levels. And, for the first time in more than 10 years, overall water levels are up in the Ogallala and Edwards-Trinity aquifers, according to data released in April by HPWD. The increase reflects the previous year pumpage.

Before this year annual water level increase, the last time groundwater levels were up was in 2004, when there was an increase of 0.74 inches, reflecting pumpage in 2013, McCain said. This data shows Floyd County had the highest gain with a 16.64-foot i... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The BEG handles the sales and distribution of many GCAGS and its affiliated geological societies' publications, such as: GCAGS, Alabama, Austin, Corpus Christi, Houston, Lafayette, Mississippi, New Orleans, & South Texas.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Bennett and Williams, Inc. provides a balanced approach to environmental stewardship and positive economic outcomes. Clean water is a necessity for life and they are experienced in providing the geoscience and engineering to deliver it. They are a small, responsive, and innovative environmental engineering business. They employ a well-educated, experienced staff with applied expertise in environmental science, geology, hydrogeology, engineering and community development.

Horizontal radial collector wells supply government and industry in the United States with more than a billion g... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The Big Bend Virtual Field Trip was created for an independent study project for the Texas A&M University Department of Geology under the supervision of Dr. Bruce Herbert. During the week of Spring Break 1996, we visited Big Bend for the purpose of researching the geology of the park and taking pictures of pertinent geologic features. Once all of the pictures and information were compiled, we scanned the images and started construction of the web site.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Continuing investigations on the unusual types of occurrences of siderite in the Atoka fm.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Detailed core photos & descriptions. U.S.G.S. Open-File Report 02-417.

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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Tony Phillips reports that as the sunspot cycle declines, cosmic rays increase. Spaceweather.com and the students of Earth to Sky Calculus have been monitoring radiation levels in the stratosphere with frequent high-altitude balloon flights over California. Here are the latest results, current as of Nov. 11, 2016.

Data show that cosmic ray levels are intensifying with an 11% increase since March 2015.

Cosmic rays are high-energy photons and subatomic particles accelerated in our direction by distant supernovas and other violent events in the Milky Way. Usually, cosmic ray... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

USGS and others conducted a 5-day survey over the Lake area with new technology, including LIDAR.

Around 500,000 people each year visit Crater Lake National Park in the Cascade Range of southern Oregon. Volcanic peaks, evergreen forests, and Crater Lake's incredibly blue water are the park's main attractions. Crater Lake partially fills the caldera that formed approximately 7,700 years ago by the eruption and subsequent collapse of a 12,000-foot volcano called Mount Mazama. The caldera-forming or climactic eruption of Mount Mazama drastically changed the landscape all around the vol... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The USGS has produced a new guidance document. The process of obtaining and analyzing water samples from the environment includes a number of steps that can affect the reported result. The equipment used to collect and filter samples, the bottles used for specific subsamples, any added preservatives, sample storage in the field, and shipment to the laboratory have the potential to affect how accurately samples represent the environment from which they were collected.

During the early 1990s, the USGS implemented policies to include the routine collection of quality-control samples i... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Graham, Baker and Andersen report that the concentration and flux of organic carbon in aquifers is influenced by recharge and abstraction, and surface and subsurface processing. In this study, groundwater was pumped from a shallow fractured rock aquifer and dissolved organic carbon (DOC) was measured in observation bores at different distances from the pumped bore.

Groundwater production at rates exceeding the aquifers yield resulted in increased DOC concentration up to 3,500% of initial concentrations. Potential sources of this increased DOC were determined using optical fluoresce... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

This is a page of GIS links for the USA. From these web pages you can download Aerial photographs (DOQs), Topographic Maps (DRGs), Digital Elevation Models (DEMs), Digital Line Graphs (DLGs) and other GIS information.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Ronald B. Peterson reports that the first step as discussed in a Water Well Journal column earlier this year (WWJ, May 2016) is proper planning. Included in the planning phase is obtaining an appropriate drilling fluid program, as property owners, hydrogeologists, or engineers often require a drilling-fluid program.

Your chosen drilling fluid vendor can either provide a drilling fluid program for you or facilitate getting one prepared for you. Make sure you provide them with as much data as you can so the program is appropriate for your project.

We need to locate and veri... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The University of Minnesota Electron Microprobe Lab is a state-of-the-art facility for non-destructive chemical analyses. Our microprobe is used for igneous, metamorphic, experimental petrology, mineral investigations, and geochronology.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Tanner Clinch, of the Casa Grande Dispatch, AZ, reports that a State of Arizona geology official says the valley around Eloy is 20 feet lower elevation than it was around 50 years ago. The Arizona Geological Survey has just revised its earth fissure monitoring maps for southern Arizona with six new maps that detail these geological hazards throughout the area.

The maps include study areas east of Picacho Peak that have dozens of reported fissures. The first fissures in southern Arizona appeared near Eloy in 1927 and are thought to be caused by depleting (over pumping?) groundwater a... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Peter Chawaga reports that in the U.S., arsenic concentrations in excess of the drinking water maximum contaminant level (MCL) of 15 mg/l in groundwater from public wells are distributed across the U.S., but 75% of these wells are in the western U.S., said Babur Mirza, a member of the research team. In basin-fill aquifers in California, Nevada, New Mexico, Arizona, and Utah, 10% of domestic wells sampled had arsenic in excess of the MCL. The Cache Valley Basin is located 128 kilometers northeast of Salt Lake City.

A survey of domestic wells in this basin showed that 17% of the 161 w... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Luczaj, et al., report that disseminated Mississippi Valley-type (MVT) mineralization occurs throughout NE Wisconsin, and is recognized as the source of regionally extensive natural groundwater contamination in the form of dissolved arsenic, nickel, and other related metals. Although considerable attention has been given to arsenic contamination of groundwater in the region, limited attention has been focused on characterizing the bedrock sources of these and other metals.

A better understanding is needed, especially in areas where groundwater is the dominant source of drinking wat... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The Maine Geological Survey provides the people and businesses of Maine with essential geologic information about the land where we live and work. Our experienced geologists collect and summarize information about groundwater, mineral resources, surface deposits and bedrock materials, stability of coastal properties, and natural hazards such as storms, floods, landslides, and earthquakes. We continually expand and improve this information, which is presented in thousands of free web pages, and thousands of maps and publications, available both as free digital downloads and in paper formats. Pr... More →
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The ~1590 Ma Olympic Dam Cu-U-Au-Ag-REE deposit is located in the Stuart Shelf geological province of South Australia, on the eastern margin of the Gawler Craton. The deposit is hosted by the Olympic Dam Breccia Complex.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The Solitario Quadrangle contains a large structural dome formed by emplacement of a large laccolith in late Eocene. Erosion of this dome has exposed a stratigraphic sequence that records the geologic history of the area since Cambrian.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Every day Geology.com is visited by thousands of geologists, earth scientists, students, teachers and others who are interested in geology or searching for geological information.
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Trevor Nace reports that the largest and most extensive study to date on Earth groundwater has revealed surprising results regarding modern groundwater recharge rates. Ancient (= deep) groundwater remains largely unknown and uncharacterized, limiting hydrogeologist understanding of recharge rates and cycle times.

Groundwater is a vital component of practically every system on Earth and has been used extensively in modern times for irrigation, potable water, and industrial activity. Further understanding of the recharge time, or the time that groundwater takes to be replenished, allo... More →
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