|Description||This coverage represents a compilation of reconnaisance geologic mapping of the Anchorage quadrangle, Alaska.|
|Originators||U.S. Geological Survey; Wilson, Frederic H.; Dover, J. D.; Bradley, Dwight C.; Weber, F. R.; Bundtzen, Thomas K.; and Haeussler, Peter J.|
|Publication||U.S. Geological Survey Open-File Report 98-133a|
Tule Lake Sample no.: A unique sample number used for all measurements. Core no.: Identifies core. Five cores were recovered from Tule Lake. This document provides data from cores 1 and 2. Drive no.: Identifies location in the core. Each core was divided into drives numbered sequentially starting with 1 at the top. Some drives have been further divided into slugs indicated by letters, starting with A at the top of the drive. Drive depth: The depth in meters of the top of the drive from the top of the core. Taken from driller¹s reports. Sample depth in drive (m): Midpoint of sample depth interval in meters. Sample depth in core (m): Sample depth within drive (m) plus adjusted depth from top of core. Adjusted depth in core (m): The depth in meters of the top of the drive from the top of the core. Depths for core 2 have been lowered by 1.17 meters based on the location of the Trego Hot Springs ash located in each core (see Bradbury, 1991). Sample density (kg/m3): Density of sample calculated from the mass of the dried box samples used in magnetic mineral studies. MSLF: Low-frequency magnetic susceptibility in m3/kg. FDMS: Frequency-dependent magnetic susceptibility in percent. IRM (1.2T): Isothermal remanent magnetization from induction in a 1.2 tesla field at room temperature. Expressed in Am2/kg. IRM (-.3T): Isothermal remanent magnetization from induction in a -0.3 tesla field at room temperature. Expressed in Am2/kg. S: (S Ratio) calculated as IRM (-0.3T)/IRM(1.2T). HIRM: Hard isothermal remanent magnetization: HIRM is calculated as: [IRM(1.2T) + IRM(-0.3T)]/2 and expressed in Am2/kg. ARM: Anhysteretic remanent magnetization in Am2/kg. Element concentration, Cr: Chromium-ppm Element concentration, Cr: Copper-ppm Element concentration, Fe: Iron- Wt% Element concentration, Mn: Manganese-ppm Element concentration, Mo: Molybdenum-ppm Element concentration, Nb: Niobium-ppm Element concentration, Ni: Nickel-ppm Element concentration, Rb: Rubidium-ppm Element concentration, Sr: Strontium-ppm Element concentration, Ti: Titanium-Wt % Element concentration, V: Vanadium-ppm Element concentration, Y: Yttrium-ppm Element concentration, Zn: Zinc-ppm Element concentration, Zr: Zirconium-ppm Total Carbon: Percent of carbon (both organic and inorganic) in sample. Carbonate Carbon: Percent of inorganic carbon in sample. Organic Carbon: Percent of organic carbon in sample. Calculated as total carbon minus carbonate carbon.
U.S. Geological Survey Open-File Report 96-293