This readme.txt file was generated on 2023-09-07 by <Josie Welsh>
Recommended citation for the data: Welsh, Josie T; Feinberg, Joshua M; Schneider, Emma L; Pares, Josep M; Jicha, Brian R; Singer, Bradley S; Carroll, Alan R. (2023). Paleomagnetism and age of the Leucite Hills Volcanic Complex, Wyoming: Implications for eruptive history, landscape evolution, and the geomagnetic instability timescale (GITS). Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/929v-p033.

-------------------
GENERAL INFORMATION
-------------------

1. Title of Dataset: Paleomagnetism and age of the Leucite Hills Volcanic Complex, Wyoming: Implications for eruptive history, landscape evolution, and the geomagnetic instability timescale (GITS)

2. Author Information

	Author Contact:  Joshua M Feinberg (feinberg@umn.edu)

	Name:  Josie T Welsh
	Institution: University of Minnesota
	Email: welsh162@umn.edu
	ORCID: 0000-0001-7174-1701


	Name:  Joshua M Feinberg
	Institution: Univeristy of Minnesota
	Email: feinberg@umn.edu
	ORCID: 0000-0002-5845-9848


	Name:  Emma L Schneider
	Institution: University of Minnesota
	Email: schn0758@umn.edu
	ORCID:0000-0001-7400-8660


	Name:  Josep M Pares
	Institution: Centro Nacional de Investigación sobre la Evolución Humana, Spain 
	Email: josep.pares@cenieh.es
	ORCID: 0000-0001-8237-6869


	Name:  Brian R Jicha
	Institution: University of Wisconsin
	Email: brian.jicha@wisc.edu
	ORCID: 0000-0002-1228-515X


	Name:  Bradley S Singer
	Institution: Univeristy of Wisconsin
	Email: bsinger@geology.wisc.edu
	ORCID: 0000-0003-3595-5168


	Name:  Alan R Carroll
	Institution: Univeristy of Wisconsin
	Email: carroll@geology.wisc.edu
	ORCID: 0000-0002-4326-4482


3. Date published or finalized for release: 2023-02-22


4. Date of data collection (single date, range, approximate date): 2020-10-08 to 2021-06-04


5. Geographic location of data collection (where was data collected?): Institute for Rock Magnetism at the University of Minnesota - Twin Cities


6. Information about funding sources that supported the collection of the data:


7. Overview of the data (abstract):
The Leucite Hills Volcanic Field, southwest Wyoming comprises two dozen volcanic features including necks, flows, dikes, and plugs. It has been the focus of many petrologic studies as its volcanic and shallow intrusive rocks are one of the only surficial manifestations of ultrapotassic lamproite. We build on paleomagnetic findings of Sheriff and Shive (1980) by providing further paleomagnetic data from the Boars Tusk dike and Black Rock flows. We also characterize the magnetic mineral assemblage of these lamproites. Principal component analysis of alternating field (AF) and thermal demagnetization data indicate that the dike and breccias of Boars Tusk record a reversed magnetic polarity and the Black Rock lava records a normal polarity, both consistent with previous findings. This recording is typically carried by minerals with coercivities >15 mT and susceptibility measurements indicate magnetite, maghemite, and titanomagnetite as likely magnetic carriers. AF and thermal demagnetization experiments evince secondary magnetizations held by lower coercivity grains, likely caused by lightning strikes. 40Ar/39Ar incremental heating experiments from Boars Tusk and Black Rock give plateau ages of ~2500 ka and ~900 ka, respectively. Recent advances in the chronology of geomagnetic field reversals and excursions during the Quaternary permit integration of the Boars Tusk dike into the lower Matuyama chron, whereas the Black Rock lavas most probably record the Kamikatsura excursion. Notably, Black Rock records high inclinations that suggest the short-lived excursion achieved a full geomagnetic reversal, something not observed at other localities recording the Kamikatsura excursion. The Leucite Hills offer further opportunities to refine the Quaternary geomagnetic instability time scale (GITS), and to improve understanding of the eruptive and geomorphic evolution of this unusual volcanism.

--------------------------
SHARING/ACCESS INFORMATION
--------------------------

1. Licenses/restrictions placed on the data: CC0 1.0 Universal (http://creativecommons.org/publicdomain/zero/1.0/)

2. Links to publications that cite or use the data:

3. Was data derived from another source?
	If yes, list source(s): 

4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/drum/policies/#terms-of-use




---------------------
DATA & FILE OVERVIEW
---------------------

File List

	Filename: Measurement_History.csv
	Short description: List of each instance that data was collected for all experiments included in the following files

	Filename: Specimen_Info.csv
	Short description: General information on each specimen. Specimen type, weights, volumes, specimen collection position and orientation information, etc.

	Filename: Paleodirection_Data.csv
	Short description: Paleodirection information interpreted from remanence measurements. 

	Filename: Curie_Temps.csv
	Short description: Curie temperatures interpreted from high temperature susceptibility measurements.

	Filename: Hysteresis_Properties.csv
	Short description: Hysteresis properties calculated from hysteresis and backfield measurements. 

	Filename: Remanence_Measurements.csv
	Short description: Contains raw data from remanence testing. Data from AF and thermal demagnetization are included in this document

	Filename: High_T_Susceptibility_Measurements.csv
	Short description: Contains raw data from high temperature bulk susceptibility testing. 

	Filename: Hysteresis_Measurements.csv
	Short description: Raw data from hysteresis measurements. 

	Filename: Backfield_Measurements.csv
	Short description: Raw data from backfield measurements. 

	Filename: Magnon_Data.csv
	Short description: Raw data from measurements on Magnon VFSM.

	Filename: Anisotropy_Measurements.csv
	Short description: Raw data from anisotropy of magnetic susceptibility measurements.


2. Relationship between files:

	- The contents of Measurement_History.csv represent all of the data collection that was conducted. The timing of collection as well as what instrument was used for each experiment is listed in this file. Thus, this file has a relationship with all other files.

	- Paleodirection_Data.csv contains data that was generated through the interpretation of the raw data in Remanence_Measurements.csv.

	- Curie_Temps.csv contains data that was generated through the interpretation of the raw data in High_T_Susceptibility_Measurements.csv.

	- Hysteresis_Properties.csv contains data that was calculated from the raw data in Hysteresis_Measurements.csv and Backfield_Measurements.csv.

--------------------------
METHODOLOGICAL INFORMATION
--------------------------

1. Description of methods used for collection/generation of data:
	Remanence Data Collection Methods:
		Cores were cut in 5mm thick specimens using a brass-blade rock saw. Specimens were sanded on all sides to remove any possible metal contamination from the saw blades and/or core drill bits. Specimens were selected preferentially from areas within the cores with fewer xenoliths and fractures. 50 specimens were analyzed using alternating field and thermal demagnetization. A D-Tech D-2000 was used for AF demagnetization and an ASC Scientific TD48-SC furnace was used for thermal demagnetization. Magnetic measurements were made using a 2G Enterprises 760-R SQUID magnetometer. All measurements were made within a shielded room with a background field between 200 and 400 nT. Sixteen demagnetization steps between 0 and 170 mT were used for the alternating field demagnetization and 16 steps between 25 and 690 °C were used for the thermal demagnetization. Low field magnetic susceptibility was measured after each thermal demagnetization step to monitor mineral alteration using a Magnon Variable Frequency Susceptibility Meter operated at 300 A/m with a frequency of 465 Hz. 

	High Temperature Susceptibility Data Collection Methods:
		Representative samples from each site at Boars Tusk were crushed to a coarse powder for measurements of low field susceptibility as a function of temperature using a KLY-2 KappaBridge AC Susceptibility Bridge with a C2 furnace. Each powdered sample was placed in a quartz test tube and weighed prior to measurement. All samples were measured in air. Susceptibility was measured every 2-4 °C during heating from room temperature (27°C) to 690°C and during subsequent cooling back to room temperature.

	Hysteresis And Backfield Data Collection Methods:
		Representative specimens were selected from the dike and the breccia at Boars Tusk for hysteresis and backfield curve measurements using a Princeton Measurements Micromag Vibrating Sample Magnetometer. Hysteresis loops were collected on unheated specimens up to peak peaks of 1.1T. Backfield curves were collected using logarithmically spaced data.

	Low Field Magnetic Susceptibility Methods:
		Low field magnetic susceptibility was measured after each thermal demagnetization step to monitor mineral alteration using a Magnon Variable Frequency Susceptibility Meter operated at 300 A/m with a frequency of 465 Hz.

	Anisotropy of Magnetic Susceptibility Data Collection Methods:
		Anisotropy of magnetic susceptibility (AMS) was measured after AF demagnetization using the protocol described in Biedermann et al (2017). An AGICO MFK1-FA susceptibility bridge was operated at the instrument’s standard field of 200 A/m and frequency of 976 Hz.

2. Methods for processing the data:
	Remanence Data Processing (For processed data see Paleodirection_Data.csv):
		 Principal and secondary components of magnetization were identified using principal component analysis in PuffinPlot (Lurcock and Wilson, 2012).

	High Temperature Susceptibility Data Processing (For processed data see Curie_Temps.csv):
		Curie temperatures were found using the first derivative method after smoothing to reduce any noise within the data.

	Hysteresis and Backfield Data Processing (For processed data see Hysteresis_Properties.csv):
		Hysteresis loops were analyzed using the approach of Jackson & Solheid (2010). Coercivity spectra were examined using Maxbauer et al. (2016).





-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Measurement_History.csv
-----------------------------------------

1. Number of variables: 5

2. Number of cases/rows: 1293

3. Missing data codes:

	- :no data is available

4. Variable List

	A. Name: Specimen
	   Description: The name of the specimen that was the subject of the measurement.
		

	B. Name: Date
	   Description: Date the measurement was collected.
	

	C. Name: Time
	   Description: Time the measurement was collected.
		Value labels if appropriate

	D. Name: Instrument
	   Description: Instrument that the measurement was collected on.
	   Below are the instrument nicknames and their corresponding official names
		IRM_Kappa:High-Temp Susceptibility Bridge (KappaBridge)
		IRM_Kappa2: MFK1-FA   Susceptibility Bridge with CS4 Furnace (AGICO)
		IRM_Magnon: MAGNON Variable Frequency Susceptibility Meter
		IRM_Sartorious: Scale
		IRM_U-channel_Magnetometer: 2G Enterprises 760-R SQUID magnetometer
		IRM_VSM Low-T: Princeton Measurements micro-VSM
		IRM_vsm_Lake_Shore: Lake Shore VSM 8600

	E. Name: Description
	   Description: A field for notes. The only note is made on certain VSM experiments where the backfield has been removed from the data.


-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Specimen_Info.csv
-----------------------------------------

1. Number of variables: 11

2. Number of cases/rows: 86

3. Missing data codes:

	- : no data available

4. Variable List

	A. Name: Key
	   Description: Unique ID number
		

	B. Name: Specimen_ID
	   Description: name given to the specimen


	C. Name: Specimen_description
	   Description: type of sample
		

	D. Name: Specimen_azimuth
	   Description: azimuth of specimen when collected
		

	E. Name: Specimen_plunge
	   Description: plunge of specimen when collected
		

	F. Name: Specimen_volume
	   Description: Volume of specimen in mm^3.
		
	
	G. Name: Specimen_mass[g]
	   Description: Mass of specimen in grams.
		

	H. Name: Expedition
	   Description: Trip on which the sample was collected
		

	I. Name: Site
	   Description: The site at which samples were collected
		

	J. Name: Sample
	   Description: The sample from which the specimen came 




-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Paleodirection_Data.csv
-----------------------------------------

1. Number of variables: 14

2. Number of cases/rows: 
	For individual specimen data: 74
	For summary data: 16


3. Missing data codes:


4. Variable List

	A. Name: Site
	   Description: The site the specimen came from

	B. Name: Treatment/Grouping
	   Description: Which demagnetization treatment the specimen got. For AF demagnetization, two directions were able to be extracted from the data, one at high coercivities (30 - 170 mT) and one at low coercivities (0 - 30 mT)
	

	C. Name: Specimen
	   Description: The specimen name 
		

	D. Name: Declination
	   Description: Declination of PCA direction from PuffinPlot


	E. Name: Inclination
	   Description: Inclination of PCA direction from PuffinPlot
		

	F. Name: MAD3
	   Description: The Maximum Angle of Deviation for the linear PCA fit; the smaller the value, the more collinear the points.
		

	G. Name: low step
	   Description: lowest step included in PCA linear fit. For thermal demag this will be in °C and for AF demag this will be in mT.


	H. Name: high step
	   Description: highest step included in PCA linear fit. For thermal demag this will be in °C and for AF demag this will be in mT.
		

	I. Name: NRM Intensity
	   Description: NRM intensity in A/m
		

	J. Name: MDF
	   Description: the treatment level at which the intensity of the sample’s remanence was reduced to half the NRM (in mT). If half-intensity was not reached, this column contains 0.


	O. Name: Site Avg JNRM
	   Description: Average JNRM for a site in Am^2/kg
		

	P. Name: a95
	   Description: Fisher α95 of mean treatment step direction (°)
		

	Q. Name: k
	   Description: Fisher k-value of mean treatment step direction
		

	R. Name: N
	   Description: Number of specimens included in the site average
		Value labels if appropriate




-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Curie_Temps.csv
-----------------------------------------

1. Number of variables: 3

2. Number of cases/rows: 7

3. Missing data codes:

4. Variable List

	A. Name: Specimen
	   Description: Name of specimen 
		

	B. Name: Curie Temp ℃ (heating)
	   Description: Curie temp found from heating curve data
		

	C. Name: Curie Temp ℃ (cooling)
	   Description: Curie temp found from cooling curve data
		



-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Hysteresis_Properties.csv
-----------------------------------------

1. Number of variables: 30

2. Number of cases/rows: 56

3. Missing data codes:

	Code/symbol	Definition
	Code/symbol	Definition

4. Variable List
	A. Name: Specimen
	   Description: Name of specimen being tested.
		

	B. Name: Ms [Am^2/kg]
	   Description: Saturation Magnetization in [Am^2/kg]
	

	C. Name: Mr [ Am^2/kg]
	   Description: Remanence Magnetization in [Am^2/kg]
	

	D. Name: Bc [mT]
	   Description: A specimen’s bulk coercivity.


	E. Name: Bcr [mT]
	   Description: A specimen’s coercivity of remanence. 
		

	F. Name: Xhf [m3/kg]
	   Description: A specimen’s high-field susceptibility. This is different from the low-field susceptibility that is typically measured using a Kappabridge.
		

	G. Name: T [K]
	   Description: Temperature at which the experiment was conducted in Kelvin. 


	H. Name: Dec [deg]
	   Description: Declination of sample in degrees
		

	I. Name: Inc [deg]
	   Description: Inclination of sample in degrees


	J. Name: HIRM [Am2/kg]
	   Description: The amount of magnetization held by magnetic minerals in a specimen with a default coercivity greater than 300 mT. 


	K. Name: S100
	   Description: The fraction of a specimen’s remanence that is held by grains with coercivities less than 100 mT.
		

	L. Name: S300
	   Description: The fraction of a specimen’s remanence that is held by grains with coercivities less than 300 mT.
		

	M. Name: loop offset [Am/kg]
	   Description: Horizontal and vertical displacements of a major hysteresis loop. 


	N. Name: Instrument
	   Description: Which instrument was used for data collection
		

	O. Name: loop_comment
	   Description: comment on whether or not the background field is subtracted from the data


	P. Name: TED
	   Description: Transient energy dissipation as defined in Fabian, K. 2003, Some additional parameters to estimate domain state from isothermal magnetization measurements, Earth and Planetary Science Letters, 213(3-4), 337-345, doi:10.1016/S0012-821X(03)00329-7


	Q. Name: Trans_hys[mT]
	   Description: Transient hysteresis as defined in Yu, Y.J., and Tauxe L., 2005, On the use of transient hysteresis in paleomagnetism for granulometry, Geochemistry, Geophysics, Geosystems, 6, Q01H14, doi:10.1029/2004GC000839
		

	R. Name: sigma_hys
	   Description: Hysteresis shape parameter as defined in Fabian, K. 2003, Some additional parameters to estimate domain state from isothermal magnetization measurements, Earth and Planetary Science Letters, 213(3-4), 337-345, doi:10.1016/S0012-821X(03)00329-7. Sigma values >0 indicate wasp-waisted loops, while values <0 indicate pot-bellied loops. 
		

	S. Name: Brh[mT]
	   Description: The median value of the remanent hysteretic curve, calculated as a function of applied field, H, as (B+(H)-B-(H))/2 


	T. Name: Bcr-dot[mT]
	   Description: Bcr-dot is an estimate of Bcr that can be calculated from a Msi curve (saturated initial magnetization curve) and its derived backfield curve, and is defined in Fabian, K. 2003, Some additional parameters to estimate domain state from isothermal magnetization measurements, Earth and Planetary Science Letters, 213(3-4), 337-345, doi:10.1016/S0012-821X(03)00329-7
		

	U. Name: alpha
	   Description: The alpha parameter for the applied approach to saturation high-field slope correction of Fabian, K. (2006). Approach to saturation analysis of hysteresis measurements in rock magnetism and evidence for stress dominated magnetic anisotropy in young mid-ocean ridge basalt. Physics of the Earth and Planetary Interiors, 154(3-4), 299–307. doi:10.1016/j.pepi.2005.06.016
	

	V. Name: beta
	   Description: The beta parameter for the applied approach to saturation high-field slope correction of Fabian, K. (2006). Approach to saturation analysis of hysteresis measurements in rock magnetism and evidence for stress dominated magnetic anisotropy in young mid-ocean ridge basalt. Physics of the Earth and Planetary Interiors, 154(3-4), 299–307. doi:10.1016/j.pepi.2005.06.016


	W. Name: Bcr [mT]
	   Description: A specimen’s coercivity of remanence. 
		

	X. Name: Xhf2[m3/kg]
	   Description: A specimen’s high-field susceptibility. This is different from the low-field susceptibility that is typically measured using a Kappabridge.
		

	Y. Name: Ms2[Am2/kg]
	   Description: A specimen’s estimated saturation magnetization.


	Z. Name: Q
	   Description: Quality factor for a major hysteresis loop. Defined as the squared linear correlation (R2) between the upper and inverted lower branches of the hysteresis loop and calculated as Q = log10 ((1-R2)-0.5).
		

	AA. Name: Qf
	   Description: Quality factor for the ferromagnetic loop (obtained after correction for the high-field slope). Defined as the squared linear correlation (R2) between the upper and inverted lower branches of the ferromagnetic hysteresis loop and calculated as Qf = log10 ((1-R2)-0.5).


	AB. Name: FNL
	   Description: F test result for nolinearity in a major hysteresis loop.


	AC. Name: FNL70
	   Description: F test result for the null hypothesis that magnetization is linear over the interval 0.7Hmax < |H| <Hmax. Large values of FNL70% indicate that the loop shows deviations from linearity (e.g., curvature) during this interval, and that a non-linear approach-to-saturation fit may be required. 
		

	AD. Name: FNL80
	   Description: F test result for the null hypothesis that magnetization is linear over the interval 0.8Hmax < |H| <Hmax. Large values of FNL80% indicate that the loop shows deviations from linearity (e.g., curvature) during this interval, and that a non-linear approach-to-saturation fit may be required.
		

	AE. Name: FNL90
	   Description: F test result for the null hypothesis that magnetization is linear over the interval 0.9Hmax < |H| <Hmax. Large values of FNL90% indicate that the loop shows deviations from linearity (e.g., curvature) during this interval, and that a non-linear approach-to-saturation fit may be required.




-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Remanence_Measurements.csv
-----------------------------------------

1. Number of variables: 18

2. Number of cases/rows: 746

3. Missing data codes:

4. Variable List

	A. Name: specimen
	   Description: Name of the specimen tested
		

	B. Name: Mx [Am^2]
	   Description: Magnetic moment in the x direction

	   
	C. Name: My [Am^2]
	   Description: Magnetic moment in the y direction


	D. Name: Mz [Am^2]
	   Description: Magnetic moment in the z direction


	E. Name: MN [Am^2]
	   Description: A specimen’s magnetization parallel to the direction of geographic north


	F. Name: ME [Am^2]
	   Description: Name of the specimen tested
		

	G. Name: MV [Am^2]
	   Description: Magnetic moment in the x direction

	   
	H. Name: Mtot [Am^2]
	   Description: Magnetic moment in the y direction


	I. Name: Dec [degrees]
	   Description: declination of magnetic moment


	J. Name: Inc [degrees]
	   Description: inclination of magnetic moment


	K. Name: Jnrm [Am^2/kg]
	   Description: Mass normalized remanent magnetization
		

	L. Name: AF [mT]
	   Description: applied field (if AF demagnetized)

	   
	M. Name: T [C]
	   Description: applied temperature (if thermally demagnetized)


	N. Name: date
	   Description: date when the measurement was taken


	O. Name: time
	   Description: time that the measurement was taken


	P. Name: position [cm]
	   Description: the position on the track that the sample was in when the mesaurement was taken


	Q. Name: Drift_ratio
	   Description: The drift ratio is the ratio of the background measurements measured before and after specimens are measured on the 3-axis, cryogenic magnetometer.


	R. Name: run number
	   Description: internally used unique identifier

-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: High_T_Susceptibility_Measurements.csv
-----------------------------------------

1. Number of variables: 3

2. Number of cases/rows:
	Number of Specimens: 9
	Number of cases per specimen: 195 - 452

3. Missing data codes:


4. Variable List

	A. Name: Specimen
	   Description: Name of specimen tested
		
	B. Name: T [℃]
	   Description: Step temperature
	
	C. Name: k [m^3/kg]
	   Description: bulk mass susceptibility 


-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Hysteresis_Measurements.csv
-----------------------------------------
1. Number of variables: 9 

2. Number of cases/rows: 
	Specimens Run21
	Cases per specimen: 500 -802

3. Missing data codes:


4. Variable List
	A. Name: Specimen
	   Description: Name of specimen being tested.
		

	B. Name: K [T]
	   Description: Temperature during run in Kelvin
	

	C. Name: dec [deg]
	   Description: declination of sample (in degrees).
	

	D. Name: inc [deg]
	   Description: inclination of sample (in degrees).


	E. Name: Bapp [mT]
	   Description: Applied magnetic field in millitesla.
		

	F. Name: M [Am^2/kg]
	   Description: Magnetic moment of the sample
		

	G. Name: Mf [Am^2/kg]
	   Description: A specimen’s ferromagnetic moment/magnetization at a specific field.


	H. Name: M-BKcor [Am^2/kg]
	   Description: A specimen’s induced magnetic response to an applied field during a hysteresis measurement after it has been corrected using a separate background hysteresis loop, typically to remove the effects of a sample holder.
		

	I. Name: Mf-BKcor [Am^2/kg]
	   Description:A specimen’s ferromagnetic induced magnetic response, after the high field slope has been mathematically removed, to an applied field during a hysteresis measurement after it has been corrected using a separate background hysteresis loop, typically to remove the effects of a sample holder.
	


	

-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Backfield_Measurements.csv
-----------------------------------------

1. Number of variables: 4

2. Number of cases/rows: 
	Number of specimens: 17
	Number of cases per specimen: 50 - 150

3. Missing data codes:


4. Variable List

	A. Name: specimen
	   Description: name of specimen being tested


	B. Name: T [K]
	   Description: temperature during measurement in Kelvin
	

	C. Name: Bapp [mT]
	   Description: applied field in millitesla
	

	D. Name: M [Am2/kg]
	   Description: Mass averaged magnetic moment


-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Magnon_Data.csv
-----------------------------------------

1. Number of variables: 7

2. Number of cases/rows: 1113

3. Missing data codes:

4. Variable List

	A. Name: Specimen
	   Description: name of the specimen being tested


	B. Name: X [m^3/kg]
	   Description: A specimen’s in-phase induced magnetization measured during a susceptibility experiment.


	C. Name: X' [m^3/kg]
	   Description: A specimen’s out-of-phase induced magnetization measured during a susceptibility experiment.


	D. Name: T [K]
	   Description: temperature of specimen during data collection


	C. Name: f [Hz]
	   Description: frequency of measurement. 


	D. Name: Hac [A/m]
	   Description: The applied AC field used to induce a magnetization during a susceptibility measurement. 

		-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Anisotropy_Measurements.csv
-----------------------------------------

1. Number of variables: 20

2. Number of cases/rows: 24

3. Missing data codes:

4. Variable List

	A. Name: specimen
	   Description: name of the specimen being tested
	

	B. Name: L
	   Description: The degree of magnetic lineation L = k1/k2, where k1 and k2 are the maximum and intermediate principal eigenvalues, respectively, of a second-rank tensor that describes magnetic anisotropy. 


	C. Name: F
	   Description: The degree of magnetic foliation F = k2/k3, where k2 and k3 are the intermediate and minimum principal eigenvalues, respectively, of a second-rank tensor that describes magnetic anisotropy. 
		

	D. Name: P
	   Description: The anisotropy degree P = k1/k3, where k1 and k3 are the maximum and minimum principal eigenvalues, respectively, of a second-rank tensor that describes magnetic anisotropy.
		

	E. Name: Pj
	   Description: : The corrected degree of anisotropy, Pj = exp (2 * {(µ1-µm)2+(µ2-µm)2+(µ3-µm)2})0.5, where µ1 = ln k1, µ2 = ln k2, µ3 = ln k3, and µm = (µ1 + µ1 + µ3)/3
		

	F. Name: T
	   Description: The anisotropy shape parameter, where T = (2 ∗  ln (k2) −  ln (k1) −  ln (k3))/(ln(k1) −  ln (k3)), and k1, k2, and k3 are the maximum, intermediate, and minimum principal eigenvalues, respectively, of a second-rank tensor that describes magnetic anisotropy. Values closer to +1 represent oblate ellipsoidal anisotropy, while values closer to -1 represent prolate ellipsoidal anisotropy.


	G. Name: max
	   Description: The magnitude of k1, the maximum principal eigenvalue for a second-rank tensor that describes magnetic anisotropy. 


	H. Name: int
	   Description: The magnitude of k2, the intermediate principal eigenvalue for a second-rank tensor that describes magnetic anisotropy. 
		

	I. Name: min
	   Description: The magnitude of k3, the minimum principal eigenvalue for a second-rank tensor that describes magnetic anisotropy. 
		

	J. Name: Dmax (specimen)
	   Description: The declination in degrees in specimen coordinates of the principal direction (eigenvector) associated with the maximum eigenvalue k1.
		

	K. Name: Imax (specimen)
	   Description: The inclination in degrees in specimen coordinates of the principal direction (eigenvector) associated with the maximum eigenvalue k1.
		

	L. Name: Dmin (specimen)
	   Description: The inclination in degrees in specimen coordinates of the principal direction (eigenvector) associated with the maximum eigenvalue k1.


	M. Name: Imin (specimen)
	   Description: The inclination in degrees in specimen coordinates of the principal direction (eigenvector) associated with the minimum eigenvalue k3.
	   

	N. Name: Dmax (in-situ)
	   Description: The declination in degrees rotated into in situ coordinates of the principal direction (eigenvector) associated with the maximum eigenvalue k1.
	   

	O. Name: Imax (in-situ)
	   Description: The inclination in degrees rotated into in situ coordinates of the principal direction (eigenvector) associated with the maximum eigenvalue k1.
	   

	P. Name: Dmin (in-situ)
	   Description: The declination in degrees rotated into in situ coordinates of the principal direction (eigenvector) associated with the minimum eigenvalue k3.


	Q. Name: Imin(in-situ)
	   Description: The inclination in degrees rotated into in situ coordinates of the principal direction (eigenvector) associated with the minimum eigenvalue k3.


	R. Name: e12
	   Description: The angular uncertainty in degrees for the directions of the principal axes along the plane described by the k1 and k2 eigenvectors. 
	   

	S. Name: e23
	   Description: The angular uncertainty in degrees for the directions of the principal axes along the plane described by the k2 and k3 eigenvectors.
	   

	T. Name: e31
	   Description: The angular uncertainty in degrees for the directions of the principal axes along the plane described by the k1 and k3 eigenvectors.