Data are in Microsoft Excel spreadsheets (both .xlsx and .csv) and Tucson Decadal formatted files (.rwl), which can be read by a number of programs including MeasureJ2X, Tellervo, R, and text editors.
The dataset consists of nearly 200 tree cores from 11 different sites in northern and southern Illinois. Ring-widths were measured under magnification of a binocular microscope to the nearest 0.001 mm with a Velmex Unislide slide-stage micrometer interfaced with a computer and MeasureJ2X program.
Project conducted in 2012. Cores were collected in 1976 and 2008-2011.