Dear Author,

The proof of your article, to be published in Planetary and Space Science, is attached to this e-mail as a "PDF" file. You will find, in addition, a Query Form detailing any questions we have regarding your article (as a separate attachment). For helpful information on PDF files, please see the end of this e-mail.

If, after reading this message, you would still prefer to receive your proofs by fax or mail then please inform us immediately by replying to this e-mail with full fax details.

This PDF file has been produced automatically from an electronic database format; the original file is maintained by Elsevier. Please note that certain details of page layout may still need to be amended before printing. However, the final, printed product will conform to our usual high standards for page layout and image resolution.

Please use this proof solely for checking the typesetting and editing, also the completeness and correctness of the text, tables and figures. Changes to the article as accepted for publication will not be considered at this stage. Also, make sure that you answer any questions (see the query form) that have arisen during the preparation of your proof.

Elsevier will do everything possible to get your article corrected and published as quickly and accurately as possible. Therefore, it is important to ensure that all of your corrections are sent back to us in one communication. Subsequent corrections will not be possible, so please ensure your first sending is complete.

List the corrections (including replies to the Query Form) in an e-mail and return to Elsevier using the "reply" button.

If, for any reason, this is not possible, mark the corrections and any other comments (including replies to the Query Form) on a printout of the PDF file and fax this to +44(0) 1392 426436 or mail to the address given below. Please state clearly your contact details, our reference code (see the "subject line" of this e-mail) and the number of fax pages transmitted.

Please do not attempt to edit the PDF file (including adding <<post-it>> type notes).

If you submitted usable colour figures with your article they will appear in colour on the web, at no extra charge, as you can see in the attached PDF proof of your article. In the printed issue, colour reproduction depends on journal policy and whether or not you agree to bear any costs.

Please respond within 2 working days (even if you have no corrections), indicating the journal name and article number on all correspondence - note that Elsevier may proceed with publication of your article if no response is received.

You should have already received a Copyright Transfer form (or Licence Agreement) and an Offprint Order form. Please return the completed and signed original of the Copyright Transfer (or Licence Agreement) by mail or fax, or a scanned copy of the signed original by e-mail, if you have not already done so. Also, please fax the Offprint Order form to the number given below if you wish to order additional offprints.

Finally, may I thank you in anticipation of your prompt co-operation and for choosing this journal as your publishing medium.

Kind regards,

Log-in Department
Elsevier
Stover Court
Bampfylde Street
Exeter
EX1 2AH
U.K.

Fax: +44(0) 1392 426436

Notes:

1: PDF files are self-contained documents for viewing on screen and for printing. They contain all appropriate formatting and all fonts, so that the correct result will be shown on screen and on the printout from your local printer.

To view and print your article you will need Acrobat Reader from Adobe. This program is freely available and can be downloaded from http://www.adobe.com/products/acrobat/readstep.html.

Please note that this reader is available for a whole series of platforms which include PC, Mac, and Unix.

There are a number of points that you need to take into account.

* Any (grey) halftones (photographs, micrographs, etc.) are best viewed on screen, for which they are optimized, and your local printer may not be able to output the greys correctly.

* Colour artwork (if applicable): If you are unable to see any colour artwork, please check that the Display large images tickbox under File ® Preferences ® General... is ticked. If you are still unable to view your artwork correctly, please contact us immediately.

* If the PDF files contain colour images, and if you do have a local colour printer available, then it will be likely that you will not be able to correctly reproduce the colours on it, as local variations can occur.

* If you print the PDF file attached, and notice some 'non-standard' output, please check if the problem is also present on screen. If the correct printer driver for your printer is not installed on your PC, the printed output will be distorted.