About the Aquifer

The Cambrian-Ordovician Aquifer is one of the principal aquifers being studied by NAWQA for ground-water status and trends.

The Cambrian-Ordovician Aquifer is comprised of multiple aquifer units interbedded with leaky confining units. Geologic materials composing the aquifer are primarily sandstone and shale.

Hydrogeology of the Aquifer -- Ground Water Atlas of the United States

Planning

Regional data synthesis for the Cambrian-Ordovician aquifer is being coordinated through the Glacial Aquifer Planning Team, led by Kelly Warner. The Cambrian-Ordovician aquifer lies beneath a central portion of the Glacial aquifer. Because of the potential for ground-water interaction between the two aquifers, data for each aquifer will be analyzed and compared.

Reports

Report Plans and Presentations

Publications

NOTE: Information about the Cambrian-Ordovician aquifer also will be published in some reports from the Glacial aquifer regional data synthesis.

Location Map (updated 10-2007)

Previous location Map Figure for use in Reports. WinZipped archive of Adobe Illustrator, CorelDraw, and PNG formats.

Data

Spatial Data

NOTE: These are Arc coverages in Arc Interchange format. To download them from your browser, right click and select 'save target as'

Updated extent of the Cambrian-Ordovician Aquifer (modified from the Ground Water Atlas and state geologic maps)

Neatline around the aquifer extent (for graphics)

Location of selected sampling sites

Spatial data prepared by Les Arihood, John Wilson, and Moon Kim

Brief description of data sets

Roads

States

Streams

Bedrock geology

Cambrian-Ordovician aquifer extent where near surface or buried geology

Major ions and nutrients

Pesticide schedules 2010 | 2033 | 2050 | 2060

Volatile organic compounds

QW data from RASA prof paper 1405-D (major inorgans, field params, isotope ratios, trace elem, arsenic, uranium, and radium226)

Water-Quality Data

Field parameter, major ion, trace element, and nutrient data for analysis of the Cambrian-Ordovician Principal Aquifer (05-20-2005). Metadata about this dataset

VOC, radionuclide, stable isotope, dissolved organic carbon data for analysis of the Cambrian-Ordovician Principal Aquifer (05-20-2005). Metadata about this dataset

Pesticides data for analysis of the Cambrian-Ordovician Principal Aquifer (05-20-2005). Metadata about this dataset

Detailed well info including primary water use, well depth, open interval top and bottom, casing diameter, lithology, water level, specific capacity, drawdown, discharge, discharge method, water level produced, depth to top and bottom of lithologic unit, and lithologic unit ID for analysis of the Cambrian-Ordovician Principal Aquifer (05-20-2005). Metadata about this dataset

Analysis

Results from preliminary analysis of Cycle I NAWQA data