Core orientation

Core orientation data were measured downhole during advanced piston corer (APC) coring, either by Minex FlexIT or Icefield MI-5 core orientation tool. These tools measure magnetic strength and orientation, 3-axis accelerometer data, and tool temperature data. 

Data File format

	Exp: expedition number.
	Site: site number.
	Hole: hole number.
	Core: core number.
	Type: type indicates the coring tool used to recover the core (typical types are F, H, R, X).
	Depth CSF-A (m): location of the observation expressed relative to the top of a hole.
	Hx (nT): average of the horizontal component of Earth's magnetic field measured during the orientation period.
	Hv (nT): average of the vertical component of Earth's magnetic field measured during the orientation period.
	Azimuth (deg): average azimuth of the hole measured during the orientation period.
	Dip (deg): average dip of the hole measured during the orientation period.
	Tool acceleration (g): average acceleration measured during the orientation period.
	Magnetic dip (deg): average dip of the Earth's magnetic field measured during the orientation period.
	Total magnetic field (nT): average total Earth's magnetic field measured during the orientation period.
	Magnetic tool face (deg): average angular difference between magnetic North and the double lines on the core liner.
	Temperature (deg C): average temperature measured during the orientation period.
	Tool ID: tool name and ID used for each oriented core.
	Excel filename: name of the compiled Excel file which contains all of the raw orientation data.
	Timestamp (UTC): time file was uploaded, which is typically a few minutes to hours after data were acquired.
	Text ID: automatically generated unique database identifier for a sample, visible on printed labels.
	Test No: unique number associated with the instrument measurement steps that produced these data. 
	Sample comments: observations recorded about the sample itself.
	Test comments: observations about a measurement or the measurement process; some measurement observations may be under Result comments.
	Result comments: observations about a measurement or the measurement process; some measurement observations may be under Test Comments.