Manuscripts should be submitted with a letter stating (1) that the contents have not

been published elsewhere; and (2) that the paper is not being submitted elsewhere.

• Manuscripts should be submitted in electronic format in Microsoft Word (.doc), on 3.5" disk or CD-ROM, which must be checked with up-to-date virus scanner. Manuscripts may also be submitted via this e-mail: tog-sci@libyatog.com .
• A title page should accompany the text, which includes: (a) paper title which should be informative and brief; (b) all author's full names; (c) all affiliations clearly indicated; (d) key words (up to six) characterizing the subject material; and (e) the name, post and e-mail addresses, and telephone and FAX numbers of the corresponding author.
• Abstracts are to be approximately 100-200 words, which should comprise a clear and concise summary of the text and conclusions of the paper.
• Computer illustration, including photographs (which must be kept to a minimum), charts and diagrams, must be submitted in high resolution format, and must be at least 300 dpi. Submit each illustration as separate file and indicate its location within the manuscript. Non-computer illustrations should be submitted in 21x28cm format. They should accompany the manuscript but should not be inserted in the text.
• Illustrations are to be referred to as "Figures" and should be numbered consecutively in the order in which they are referred to in the text. They should be designed to go across a single or double column width of the page. Brief captions should be provided to make the figures as informative as possible.
• All hand line drawings should be made with black drawing on white paper (preferably tracing paper).
• The authors' last name should be written in the margins (or on back) for identifications.

• Non-computer photographs should be glossy prints. The authors last name and identification, as to which is the top of the photo, is to be written in pencil on the back.
• A list of figures and table captions are to be typed on a separate page and attached to the end of the manuscript. List the figure number in the form "Fig. 1".
• In the manuscript, principal headings should be typed at the centre of the page in capital letters. Headings of the text, first lower rank should be typed in small letters (first letters of the headings and proper nouns are to be capitalized). The following text should begin on the next line. For headings of second lower rank, underline and place a dash after the headings, and follow with text on the same line.
• All references should be grouped at the end of the paper, under the heading REFERENCES, either alphabetically or numbered in the order they appear in the text. For a given author referred to more than once, use chronological listings with a suffix (a, b, etc.) to distinguish references of the same year. In the list of references, the following order and punctuation should be observed:

For references to a paper from journals:

• author(s) name (last name first, initials),
  
• year of publication,
• title (capitalize first word):
• journal name (abbreviate conforming to world list of scientific periodicals), volume number should be in bold; journal name and/or book title in italics.
• Page number (followed by beginning and ending page numbers).

Example:

Lagha, S., 1997. Petrography of the Triassic phosphorites in the Gharyan area, N.W. Libya. Petroleum Res. J., 9, 45-50.

For reference books:

1. author(s) name (as above).
2. year of publication
3. title (capitalize all words of the title).
4. publisher (firm name).

Example:

Tucker, M. E., 1981. Sedimentary Petrology: An Introduction. Blackwell Scientific, 251 p.

For references to a paper within a book: - author(s) name

1. Year of publication,
2. Title of paper/(followed by) Editor(s) name(s)
3. Title (of book):
4. Page range, Publisher.

Example:

EI-Bakai, M.T., 2996. Diagnesis and digenetic history of the Lidam Formation, N.W. Sirt Basin In: M.J. Salem. A.S. El-Hawat and A.M. Sbeta (eds.) The Geology of Sirt Basin, I, 83-97. Elsevier, Amesterdam.