Membership Application

Ooliths, Image Credit: Lori Carter

(See more about this image below)

For clubs that would like to join the SFMS

Please click below to read the bylaws concerning membership, then download the SFMS Membership Application, fill it out, and send it along with the following to the address on the application:

The application must be approved by the SFMS Executive Board, then the club can enjoy the many benefits of membership in the SFMS! Please explore this website to learn more!

SFMS Membership Application

About the image on this page


In this close-up picture of a piece of gravel (see the image below) collected on a club field trip in Alabama, there are some weird little spheres that are about 2mm wide. Each one is a tiny concretion called an oolith (pronounced oh-uh-lith). Ooliths are formed in shallow water that has gentle back and forth movement. Calcium carbonate in the water accumulates around a nucleus, like a piece of sand or shrimp poop. It builds up layer by layer like a pearl. Over time, the ooliths may become stuck together to form a rock. Then after even more time, the calcium carbonate is replaced by silica. In this case, in addition to the silica, something else was involved in the replacement, perhaps manganese or iron, hence the dark color of the ooliths.

Image Credits: Lori Carter