L-31N Lithological and Geophysical Data

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Cunningham, Kevin, 2004, L-31N Lithological and Geophysical Data.

   Online Links:

   • <http://sofia.usgs.gov/exchange/L31_wells/index.html>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -80.5

   East_Bounding_Coordinate: -80.4

   North_Bounding_Coordinate: 25.75

   South_Bounding_Coordinate: 25.6

3. What does it look like?

   <http://sofia.usgs.gov/exchange/L31_wells/location.html> (GIF)

   map showing location of coreholes and monitoring wells for the L31N seepage project

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 2003

   Ending_Date: 2004

   Currentness_Reference: ground condition

5. What is the general form of this data set?

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: Biscayne aquifer

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 1. Longitudes are given to the nearest 1. Latitude and longitude values are specified in Degrees, minutes, and decimal seconds.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

      Altitude_Datum_Name: National Geodetic Vertical Datum of 1929

      Altitude_Resolution: .01

      Altitude_Distance_Units: feet

      Altitude_Encoding_Method: Implicit coordinate

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview:

   Information collected for the wells included caliper log, conductivity and resistivity log, gamma log, flow log, spinner fow meter log, and the lithologic and geophysical log.

   Entity_and_Attribute_Detail_Citation: none

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Kevin Cunningham

2. Who also contributed to the data set?

   This was a joint project with the U.S. Army Corps of Engineers (USACE) and the South Florida Water Management District (SFWMD). USGS project personnel included Michael Wacker.

3. To whom should users address questions about the data?
   Kevin Cunningham
   U.S. Geological Survey
   3110 SW 9th Ave.
   Ft. Lauderdale, FL 33315
   USA
   

   954 377-5913 (voice)
   954 377-5901 (FAX)
   kcunning@usgs.gov
   

Why was the data set created?

The goal of the L-31N Seepage Management Pilot Project is to reduce levee seepage that moves from Everglades National Park to the east. As participants in this pilot project, the South Florida Water Management District, the United States Army Corps of Engineers, and the United States Geological Survey worked together to provide a hydrogeologic characterization of the Surficial aquifer underlying the L-31N Levee in Miami-Dade County, Florida. Because there is little detailed hydrogeologic data of the Surficial aquifer (to depth) in this area, the L-31N Seepage Management Project Delivery Team (PDT) installed two clusters of monitor wells and four additional coreholes along the levee to provide the necessary detailed hydrogeologic data to the PDT.

The L-31N project was spilt into two seperate projects, a data acquisition project and an interpretive project. The objectives of the data acquisition project was to provide the on-site geologic expertise while the four coreholes and the deepest well in each cluster were drilled and constructed, and to complete the downhole geophysical logging including video and flow meter logging of these boreholes. The objective of the data interpretation project was to provide the PDT with detailed hydrogeologic information in order to understand the movement of water in the Surficial aquifer along the L-31N levee and delineate the lithology and hydrostratigraphy of the rocks and sediments underlying the levee.

How was the data set created?

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: Oct-2003 (process 1 of 2)

   Well-site data acquisition phase:

   South Florida Water Management District (SFWMD) responsibilities:

   Contracted with licensed drilling contractor to install monitor wells and coreholes, Coordinated schedule with drilling contractor and the USGS staff, Was available to meet with or talk with on-site geologists to discuss the new data and select well screen intervals, and Provided timely review and comments/approval of deliverables.

   USGS responsibilities:

   Provided personnel and equipment, including geophysical tools, flow meters, and video tools required to complete the project, Monitored the performance of the drilling contractor to assure adherence to the established scope of work, Used USGS geophysical tools, flow meters, and video tools to log four coreholes and the deepest well in each cluster, Provided lithologic and geophysical data and other information to SFWMD staff to select well-screen interval depths and make other geotechnical decisions, Provided deliverables including digital logs, MPG file (mini-movie of borehole video), and computed vuggy porosity logs Calibrated geophysical log data to seismic reflection profiles using newly acquired sonic velocity data,

   Date: 2004 (process 2 of 2)

   Data interpretation phase:

   The USGS:

   Provided personnel and equipment, including appropriate software necessary to complete the project, Provided USGS hydrostratigraphic data as needed to complete the project., Provided as deliverables six log montages and a hydrostratigraphic cross section as an Open-File report in the form of a plate, and Presented the findings to the PDT.

   Person who carried out this activity:
   

   Kevin Cunningham
   U.S. Geological Survey
   3110 SW 9th Ave.
   Ft. Lauderdale, FL 33315
   USA
   

   954 377-5913 (voice)
   954 377-5901 (FAX)
   kcunning@usgs.gov
   

3. What similar or related data should the user be aware of?

   Cunningham, Kevin J. Carlson, Janine L., Wingard, 2004, Characterization of Aquifer Heterogeneity Using Cyclostratigraphy and Geophysical Methods in the Upper Part of the Karstic Biscayne Aquifer, Southeastern Florida: USGS Water Resources Investigations Report 03-4208, U.S. Geological Survey, Tallahassee, FL.

   Online Links:

   • <http://pubs.usgs.gov/wri/wri034208/>

   Cunningham, Kevin J. Wacker, Michael A., Robinso, 2004, Hydrogeology and Ground-Water Flow at Levee 31N, Miami-Dade County, Florida, July 2003 to May 2004: Scientific Investigations Map I-2846, U.S. Geolgoical Survey, Reston VA.

   Online Links:

   • <http://sofia.usgs.gov/publications/sim/I-2846>

   Cunningham, Kevin J. McNeill, Donald F., Guertin, 1998, New Tertiary Stratigraphy for the Florida Keys and southern peninsula of Florida: GSA Bulletin v. 110, no.2, Geological Society of America, Boulder, CO.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/new_tert_strat/>

   Cunningham, Kevin J. Carlson, Janine I., Hurley,, 2004, New method for quantification of vuggy porosity from digital optical boreholes images as applied to the karstic Pleistocene limestone of the Biscayne aquifer, southeastern Florida: Journal of Applied Geophysocs v. 55, Elsevier Science BV, Amsterdam, Netherlands.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/vuggypor/>

   Other_Citation_Details:

   Entire paper is available from the Journal of Applied Geophysics website (journal subscription is required)

   Cunningham, Kevin J. Locker, Stanley D., Hine, L, 2003, Interplay of Late Cenozoic Siliciclastic Supply and Carbonate Response on the Southeast Florida Platform: Journal of Sedimentary Research v. 73, no. 1, SEPM Society for Sedimentary Geology, Tulsa, OK.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/interplay_platform/>

   Cunningham, Kevin J., 2004, Application of ground-penetrating radar, digital borehole images, and cores for characterization of porosity hydraulic conductivity and paleokarst in the Biscayne aquifer, southeastern Florida, USA: Journal of Applied Geophysics v. 55, Elsevier Science, Amsterdam, Netherlands.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/hc_paleokarst/>

   Other_Citation_Details:

   Entire paper is available from the Journal of Applied Geophysics wersite (journal memership is required)

   Bruno, M. Cristina Cunningham, Kevin J.,, 2003, Copepod Communities from Surface and Ground Waters in the Everglades, South Florida: Southeastern Naturalist v. 2, no. 4, BioOne, Washington. DC.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/copepod_comm/>

   Other_Citation_Details:

   The original of this paper was in the Southeastern Naturalist published by the Humboldt Field Research Institute in Maine.

   Cunningham, Kevin J. Locker, S.D., Hine, A. C., , 2001, Surface-Geophysical Characterization of Ground-Water Systems of the Caloosahatchee River Basin, Southern Florida: USGS Water Resources Investigations Report 01-4084, U.S. Geological Survey, Tallahassee, FL.

   Online Links:

   • <http://fl.water.usgs.gov/Abstracts/wri01_4084_cunningham.html>

   Cunningham, Kevin J. Bukry, David, Sato, Tokiyuk, 2001, Sequence Stratigraphy of a South Florida Carbonate Ramp and Bounding Siliciclastics (Late Miocene-Pliocene): Florida Geological Survey Special Publication 49, Florida Geological Survey, Tallahassee, FL.

   Online Links:

   • <http://sofia.usgs.gov/publications/papers/fgssp49>

   Other_Citation_Details:

   in Geology and Hydrology of Lee County, Florida Durward H. Boggess Memorial Symposium

   Thomas M. Missimer and Thomas M, Scott, eds

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

2. How accurate are the geographic locations?

   Latitude and longitude are given to the nearest second.

3. How accurate are the heights or depths?

   0.0 feet error after logging

4. Where are the gaps in the data? What is missing?

   The same procedure was followed for all wells and the coreholes. Well G-3778 does not have a spinner flow meter log.

5. How consistent are the relationships among the observations, including topology?

   The USGS geologist was on site while the drill crew prepared to drill and while drilling, developing, and constructing the four coreholes and the deepest well in each cluster. The site geologist:

   Monitored the drilling contractor for adherence to the work order specifications including environmental limitations/requirements, borehole development, and well construction, Collected, labeled, and stored all geologic samples (cores and liners from SPTs), Described geologic samples in field log book, and Summarized hydrogeologic data and other information from the wells and provided it to the USGS Water District staff.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints: None.

1. Who distributes the data set? (Distributor 1 of 1)
   Heather S.Henkel
   U.S. Geological Survey
   600 Fourth St. South
   St. Petersburg, FL 33701
   USA
   

   727 803-8747 ext 3028 (voice)
   727 803-2030 (FAX)
   hhenkel@usgs.gov
   

2. What's the catalog number I need to order this data set?

   L-31N lithological & geophysical data

3. What legal disclaimers am I supposed to read?

   No warrantees are implied or explicit for the data

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	The data are in tables in .las format which can be opened in any logging computer program. in format Log ASCII Standard (version unknown)
     Network links:	<http://sofia.usgs.gov/exchange/L31_wells/index.html>

     Data format:	The data are in ASCII text files in format ASCII (version unknown)
     Network links:	<http://sofia.usgs.gov/exchange/L31_wells/index.html>

     Data format:	graphic showing depth, lithofacies, OBI 40 digital borehole image, porosity logs, flow meter logs, gamma, conductivity and resistivity, full waveform sonic data, and well completion diagrams for each well in format Adobe PDF (version 7.0)
     Network links:	<http://sofia.usgs.gov/exchange/L31_wells/index.html>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 30-Jan-2007

Metadata author:

Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701
USA

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

U.S. Department of the Interior, U.S. Geological Survey, Center for Coastal Geology
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Tue Jan 30 12:00:51 2007