Answer to What is This on the Cover of American Laboratory August

The image on the cover of American Laboratory August is an ion beam polished cross-section of shale showing silicate minerals, pyrite “framboise” and keragen. The sample was prepared on an argon beam cross-section polisher and captured with a JEOL Field Emission SEM with low angle backscatter. Original magnification 2000×. Image courtesy of JEOL USA, Inc. (Peabody, MA, U.S.A.).Field emission scanning electron microscopy is a useful technique for observing materials such as shales and mudstones at the nanometer scale.

Congratulations to Robinson, the winner of this months Amazon gift card.

If you have an image you would like to submit for use on one of our covers please contact smessinger@americanlaboratory.com.

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