Structure and stratigraphy of Tertiary and Quaternary strata, Heceta Bank, central Oregon shelf

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?

   Muehlberg, Gary Edward , 1971, Structure and stratigraphy of Tertiary and Quaternary strata, Heceta Bank, central Oregon shelf: Oregon State University, Corvallis, OR.

   Other_Citation_Details: Masters thesis

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -124.878

   East_Bounding_Coordinate: -124.490

   North_Bounding_Coordinate: 44.343

   South_Bounding_Coordinate: 44.080

3. What does it look like?

   Muehlberg_MS_1971 (JPG)

   Screen grab of GIS-produced sample distribution, with bathymetry and land for reference.

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

   Beginning_Date: 1968

   Ending_Date: 1969

   Currentness_Reference: Publication date

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

   Geospatial_Data_Presentation_Form: Paper

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Point (32)

   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 0.00167. Longitudes are given to the nearest 0.00167. Latitude and longitude values are specified in Decimal degrees.

7. How does the data set describe geographic features?

   Point

   SDTS point (Source: Source report)

   Sample number

   Sample number (Source: Oregon State University)

   Alpha numeric code based on year, month, and sample number

   Subsample depth

   Subsample depth (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	0.77
   Units:	Meter
   Resolution:	0.01

   GSA Color and Code No.

   Color of rock (Source: Source report and GSA Munsell Color Code)

   Color and color code (HVC)

   Rock type and description

   Written description of sample (Source: Source report)

   Written description of sample, including age (epoch).

   Sand

   Amount of sand in disaggregated semilithified sample (Source: Wentworth 1938)

   Range of values
   Minimum:	0.2
   Maximum:	37.55
   Units:	Percent
   Resolution:	0.01

   Silt

   Amount of silt in disaggregated semilithified sample (Source: Wentworth 1938)

   Range of values
   Minimum:	29.03
   Maximum:	67.13
   Units:	Percent
   Resolution:	0.01

   Clay

   Amount of clay in disaggregated semi lithified sample (Source: Wentworth 1938)

   Range of values
   Minimum:	31.92
   Maximum:	60.36
   Units:	percent
   Resolution:	0.01

   Ferromagnesian

   Ferromagnesian grains in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	4.6
   Maximum:	41.5
   Units:	Percent
   Resolution:	0.1

   Foraminifera

   Foraminifera in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	41.8
   Units:	Percent
   Resolution:	0.1

   Fish teeth

   Fish teeth in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	0.7
   Units:	Percent
   Resolution:	0.1

   Fir pollen

   Fir pollen in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	2.4
   Units:	Percent
   Resolution:	0.1

   Micas

   Micas in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	6.1
   Units:	Percent
   Resolution:	0.1

   Pyrite

   Pyrite grains in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	41
   Units:	Percent
   Resolution:	0.1

   Quartz_feldspar group

   Quartz feldspar group grains in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	3.1
   Maximum:	44.2
   Units:	Percent
   Resolution:	0.1

   Radiolaria

   Radiolaria in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	77.4
   Units:	Percent
   Resolution:	0.1

   Rock fragments

   Rock fragments in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	1.6
   Maximum:	36.6
   Units:	Percent
   Resolution:	0.1

   Shell fragments

   Shell fragments in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	3.5
   Units:	Percent
   Resolution:	0.1

   Sponge spicules

   Sponge spicules in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	25.2
   Units:	Percent
   Resolution:	0.1

   Statoliths

   Statoliths in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	1.1
   Units:	Percent
   Resolution:	0.1

   Unknowns

   Unknown grains in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0
   Maximum:	2.1
   Units:	Percent
   Resolution:	0.1

   Volcanic glass

   Volcanic glass in coarse fraction (sand) (Source: Source report)

   Range of values
   Minimum:	0.6
   Maximum:	21.8
   Units:	Percent
   Resolution:	0.1

Who produced the data set?

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

2. Who also contributed to the data set?

   Gary Edward Muehlberg at Oregon State University for the collection and analysis of data. For inclusion into usSEABED: Digitization: Jane Reid (USGS); Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado)

3. To whom should users address questions about the data?
   College of Oceanic and Atmospheric Sciences, Oregon State University
   104 COAS Admin Bldg
   Corvallis, OR 97331-5503
   

   541-737-3504 (voice)
   

Why was the data set created?

Not recorded

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: Unknown (process 1 of 1)

   The lithified cores were described in detail with the aid of a microscope and color coded using the Geologic Society of America color chart (1963). Since most of the rocks were generally semilithified, they were broken down, disaggregated, and treated as sediment samples. The process consists of repeated cycles of soaking in buffered hydrogen pyroxide and treatment with an ultrasonic probe. The sample was inspected under the microscope at the end of each cycle for the presence of grain aggregates. Distilled water was added to the disaggregated sample and then drawn off through micropore candle filters. A Calgon and water solution was then added to the sample and drawn off by candle filters. The process was repeated three or four times. The sample was wet sieved to remove the sand fraction (>62 microns); it was then dried and weighed. The fine fraction (silt and clay) analysis was done by pipette (Krumbein and Pettijohn, 1938). Percentage of sand, silt, and clay were calculated from these data. A split of at least 300 grains was separated from the sand fraction and counted on a grid. The grains were divided into rock fragments, quartz and feldspars, mafic grains, micas, pyrite, glauconite, biogenous material (forams, sponge spicules, radiolaria, diatoms, etc.). Selected rock samples were thin sectioned and examined with a petrographic microscope. Most samples were too fine grained for petrographic analysis and consequently were not used extensively in the final analysis of this study.

   Person who carried out this activity:
   

   College of Oceanic and Atmospheric Sciences, Oregon State University
   104 COAS Admin Bldg
   Corvallis, OR 97331-5503
   

   541-737-3504 (voice)
   

   Data sources used in this process:

   • Geologic Society of America color chart, 1963
   • Krumbein and Pettijohn, 1938

   Data sources produced in this process:

   • Muehlberg_MS_1971

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?

   No estimate made for the accuracy of the data in the original report. Data digitized by the USGS and partners were visually compared to the source data, and corrected. Where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS.

2. How accurate are the geographic locations?

   Navigation techique of Loran A, radar, and bathymetry; some longitudes were corrected due to navigation limitations; these fixes were taken from their relative positions on the seismic record where control is better. Positions given to minute-tenths, and precision given as 2 kilometers.

3. How accurate are the heights or depths?

   Depth determination technique not given in report. Water depths not recorded, but less than 110 meters; subsample depths given to nearest centimeter.

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

   For usSEABED all data from Appendices V, VI, and VII were completely digitized.

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

   Data fall within normal ranges for the given parameters.

How can someone get a copy of the data set?

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

Access_Constraints: Thesis is available at the USGS library and at other libraries.

Use_Constraints:

Cite G.E. Muehlberg and Oregon State University as originators of the data.

1. Who distributes the data set? (Distributor 1 of 1)
   College of Oceanic and Atmospheric Sciences, Oregon State University
   104 COAS Admin Bldg
   Corvallis, OR 97331-5503
   

   541-737-3504 (voice)
   

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

   G. Muehlberg MS thesis 1971

3. What legal disclaimers am I supposed to read?

   Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies and limitations of the statistical data.

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

     Thesis is available at libraries.

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?

   None

Who wrote the metadata?

Dates:

Last modified: 2005

Metadata author:

U.S. Geological Survey
c/o Jane A. Reid
Geologist
400 Natural Bridges Drive
Santa Cruz, CA 95060

831-427-4727 (voice)
jareid@usgs.gov

Contact_Instructions: email preferred

Metadata standard:

CSDGM Version 2 (FGDC-STD-001-1998)