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Tables should replace text, not duplicate it. They should be numbered consecutively, and each must be typed on a separate page. See sample table for further instructions.


  1. TITLE
    Center the title above the table. Use all capital letters except for the symbols for chemical elements (e.g., Ar) and abbreviations for years before present (e.g., Ma). Follow the table number with a period, then the title. Separate the title from the rest of the table with a double horizontal line.
    Start all column headings just below the double horizontal line. Make the heading for the first column flush left; center all other column headings. Use only an initial capital letter for each heading, unless other capital letters are required (e.g., formal names or chemical symbols). Abbreviate units of measurement and place them in parenthesis on a separate line just below the rest of the heading. Separate the headings from the body of the table with a single horizontal line.
  3. BODY
    Start all columns just below the single horizontal line at the base of the column headings. Make the first column flush left. Center columns with numbers and align them on the decimal. Use a zero before the decimal point for values less than one. Align text entries on the left and indent each line after the first. Separate sections of the table body (optional) with line space. Label these sections (optional) with a bold underlined heading that is flush left. Do not leave blank spaces in the body of the table. These should be marked "N.D." (no data), "N.A." (not applicable), or otherwise as appropriate, and the abbreviations should be explained in the "Notes:" section of the footnotes. Follow the body of the table with a single horizontal line.
    Treat each footnote as a separate paragraph: Indent the first line three spaces and end with a period. Place general information about the table in the first footnote, and precede this entry with "Notes:" in italics rather than using a footnote symbol. Footnotes should appear in the same order as the symbols were used in the table.


If several items in a table require footnotes, use relative position in the table to determine the order in which footnotes are marked. Start at the top of the table, work from left to right, then from top to bottom. Use the following sequence for footnotes: * (asterisk), † (dagger), § (sections mark), # (pound symbol), **, ††, §§, ##, ***, †††, §§§, ###, and so on. If asterisks already appear in the table (such as *Ar for radiogenic argon), do not use them in footnotes; start footnotes with a single dagger (†). If you are unable to generate daggers and section marks with your computer, use only asterisks and pound symbols.