Attribute_Accuracy_Report:
Sampling:
Paleomagnetic samples were collected in the form of oriented cubes.
Orientation was maintained with respect to the core axis. Azimuthal
orientation was not maintained.
Material collected from around each paleomagnetic specimen was vialed. The
depth interval of material contained in each vial corresponds closely (but
not exactly) to the interval sampled by a paleomagnetic specimen.
Paleomagnetic directions:
Progressive demagnetization occured in at least five steps and many
specimens were demagnetized at additional levels.
Characteristic directions of magnetization were calculated by fitting lines
to demagnetization data which visually appear to define coherent components
when displayed on orthogonal vector diagrams.
Hysteresis properties:
For each hysteresis loop generated, high field (or paramagnetic) magnetic
susceptibility was determined by fitting lines to a portion of the data for
inductions above about 0.9T.
Six tables record information from the various studies performed on core
material. All studies were not completed on all samples. Two different
sample entities were collected from core material, "Vials" and "Sample
boxes". "Vials" and "Sample boxes" were labeled as follows:
Paleomagnetic specimens, 3.2 cm3 in volume, were taken in plastic boxes.
Each paleomagnetic specimen was given a unique box number and the depth
interval (with respect to the top of the core segment) covered by each box
was recorded. Subsequently each specimen was assigned a second unique
number, the sample number. Core material removed from around each
paleomagnetic specimen was placed in one or more numbered vials. The
depth interval contained in each vial corresponds closely (but not
exactly) to the interval sampled by a paleomagnetic specimen. These vials
were later assigned sample numbers. Material in these vials was used to
determine grain size, and elemental concentrations.
"Depth in hole (meters)" is consistantly used throughout the data tables.
Other entities are used as follows.
+-------------------+-----------------------------------------------------+
| | Table Table Table Table Table Table |
| | 1 2 3 4 5 6 |
+-------------------+-----------------------------------------------------+
| Sample number | X |
| | |
| Sample box number |X some X X X X X |
| | |
| Vial number |X some X X |
+-------------------+-----------------------------------------------------+
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The horizontal coordinates of the Buck Lake core site were
determined from the position of the site on the Lake of the
Woods, Oregon 7.5 minute topographic quadrangle map. The accuracy of the
measurements are estimated to be + or - 0.005 degrees latitude
and + or - 0.005 degrees longitude.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The altitude of the core sight was determined from the Lake of
the Woods, Oregon 7.5 minute topographic quadrangle map. The
contour interval of the map is 5 feet. The accuracy of the
measurement is estimated at + or - 5 feet.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Adam, D.P
Publication_Date: 1993
Title:
Field core processing techniques used by U.S.G.S. 1991 drilling
operations in the Upper Klamath basin, Oregon and California: U.S.
Geological Survey Open-file Report No. 93-20
Edition: First
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 93-20
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19930101
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Adam, (1993)
Source_Contribution: Lithology
Source_Information:
Source_Citation:
Citation_Information:
Originator: Adam, D.P.
Originator: Rieck, H.J.
Originator: McGann, M.L.
Originator: Schiller, K.
Originator: Sarna-Wojcicki, A.M.
Publication_Date: 1994
Title:
Lithologic description of sediment cores from Buck Lake, Klamath County, Oregon: U.S.
Geological Survey Open-file Report No. 94-12, 48 p.
Edition: First
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 94-12
Publication_Information:
Publication_Place: Menlo Park, California
Publisher: U.S. Geological Survey
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Quaternary
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Adam and others (1994)
Source_Contribution: site description, drilling methods, lithology of sediments
Source_Information:
Source_Citation:
Citation_Information:
Originator: Rosenbaum, J.G
Originator: Reynolds, R.L.
Originator: Fitzmaurice, P.
Originator: Adam, D.P.
Originator: Sarna-Wojcicki, A.M.
Originator: Kerwin, M.W.
Publication_Date: 1994
Title:
Covariance of magnetic and pollen records from Quaternary sediment, Buck Lake and Caledonia
Marsh, southern Oregon: Proceedings of the VIIth International Symposium on the Observation of
the Continental Crust Through Drilling.
Edition: First
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Quaternary
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Rosenbaum and others (1994)
Source_Contribution:
Covariation of magnetic properties of sediments and climate change as interpreted from the pollen
record.
Process_Step:
Process_Description:
Sampling
Paleomagnetic specimens, 3.2 cm3 in volume, were taken in plastic boxes. Pedestals were cut in
the core, boxes were placed over the pedestals, and the sediment in the boxes was then cut from
the core and the boxes were sealed. Orientation was maintained with respect to the core axis
but the specimens were not azimuthally oriented. Each paleomagnetic specimen was given a
unique box number and the depth interval (with respect to the top of the core segment) covered
by each box was recorded. Subsequently each specimen was assigned a second unique number, the
sample number. These boxed samples were used for measurements of magnetic susceptibility,
paleomagnetic directions and magnitudes, laboratory induced magnetizations, and hysteresis
properties.
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Paleomagnetic Directions
Directions and magnitudes of natural remanent magnetization and of
magnetization after alternating-field demagnetization were determined with
a cryogenic magnetometer (sensitivity better than 10-5 A/m), a low-speed (
5 Hz) spinner magnetometer (sensitivity 10-3 A/m), or a high-speed (90 Hz)
spinner magnetometer (sensitivity better than 10-5 A/m). Each specimen
was subjected to progressive alternating-field demagnetization to at least
60 mT. Progressive demagnetization occurred in at least five steps (peak
inductions of 10, 20, 30, 40 and 60 mT) and many specimens were
demagnetized at additional levels. Characteristic directions of
magnetization were calculated by fitting lines to demagnetization data (
Kirschvink, 1980) which visually appeared to define coherent components
when displayed on orthogonal vector diagrams.
Process_Date: 19930701
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Magnetic Susceptibility
A susceptometer (sensitivity better than 10-5
volume SI), operating at about 600 Hz or 6000 Hz, was used to measure low
frequency (MSLF) and high-frequency (MSHF) magnetic susceptibilities. The
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Laboratory Induced Magnetizations
A low speed-spinner magnetometer or a high-speed spinner magnetometer was
used to measure anhysteretic remanent magnetization (ARM) and isothermal
remanent magnetization (IRM). Following AF demagnetization, ARM was imparted
to each specimen in a alternating induction of 100 mT and DC bias of 0.1 mT.
Subsequently, an impulse magnetizer was used to impart IRMs. First
specimens were given an IRM in an induction of 1.2 T (IRM1.2), and then they
were given an oppositely directed IRM in an induction of 0.3 T (IRM-0.3).
The "hard"
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Hysteresis Properties
Hysteresis loops were generated for a subset of the paleomagnetic
specimens using a vibrating sample magnetometer at the Institute for Rock
Magnetism at the University of Minnesota. The maximum induction used was
about 1.4 T. For each loop, high field (or paramagnetic) magnetic
susceptibility was determined by fitting lines to a portion of the data
for inductions above about 0.9 T. The induced magnetization due to this
paramagnetic susceptibility was subtracted from the observed
magnetizations prior to calculation of hysteresis properties.
Process_Date: 19930701
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Curie Temperatures
Curie temperatures were determined for magnetic minerals separated from
bulk sediment that had been placed in bags during sampling. The
separations were done by dispersing the sediment in water (with a small
amount of surfactant) and pumping the resulting slurry past a magnet using
a technique similar to that described by Petersen and others (1986).
Magnetization, in an induction of 0.3 T or greater, was measured as a
function of temperature using a sensitive balance similar to that
described by Larson and others (1975).
Process_Date: 19930701
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Grain Size Analyses
Bulk sediment grain sizes (between 0.2 and 50 microns)
were obtained for sediment in 21 vials using an automated particle-size
analyzer. These results are summarized here as the percentage of sediment
greater than 3.2 microns in size.
Process_Date: 19930701
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description:
Elemental Abundances
Sediment from vials was prepared for energy-dispersive X-ray fluorescence
analysis by thorough drying and subsequent pulverization in a shatter
box. Analyses were made at the Department of Geological Sciences,
University of Colorado. Analyses were made for Ba, Cr, Cu, Fe, La, Mn,
Ni, Rb, Ti, V, Zn and Zr. In addition, concentrations of total carbon and
carbonate carbon were determined by coulometry (Engleman and others,
1985). Organic carbon content was determined by taking the difference
between total carbon and carbonate carbon.
Process_Date: 19930701
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph G. Rosenbaum
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: Box 25046, Denver Federal Center, MS 980
Address: DFC Bldg. 025, Room 1983B
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0046
Country: United States of America
Contact_Voice_Telephone: 303-236-1304
Contact_Electronic_Mail_Address: jrosenbaum@usgs.gov
Process_Step:
Process_Description: Creation of original metadata record
Process_Date: 20130506
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kevin M. Foley
Contact_Organization: U.S. Geological Survey
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing address
Address: U.S. Geological Survey
Address: 12201 Sunrise Valley Drive Mail Stop 918
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: (703) 648-5285
Contact_Facsimile_Telephone: (703) 648-6560
Contact_Electronic_Mail_Address: kfoley@usgs.gov
