Cracks in time

This is a cross-section from a Septarian geode. These geodes were formed in the ancient sea floor.

Septarian geodes are formed from claystone and have yellow calcite filling the cracks in crystal form. Aragonite veining outlines the calcite, forming brown patterns.

These geodes are generally buried in clay 20-30 feet underground. They are 50-70 million years old, from the Cenozoic Era.

[aikimomm (phoebe)]

Neat patterns, Denise, nice photo. I'm a rockhound myself.

[Diane]

This is beautiful! I have a couple of geodes my son collected, but never thought to photograph them. That's what is so neat about this project--seeing through other people's eyes.

[Shelly]

awesome! it's really pretty when you use the magnifier too.

[Deanna Christensen]

Great photo! Interesting and informative :)

[Paula Fontanini]

Beautiful image and iinteresting facts! They are beautiful...I had a collection of geodes when I was a kid!

[Graham Harcombe]

It's gorgeous. I have seen these geodes in various colours they are so amazingly attractive.

[Susan McIntyre]

Great shot, it makes a lovely abstract image. Nice focus.

[Marinade Spatula]

Lovely shot of this and such interesting information about it - very interesting and engaging image.

[Mimo]

great information and beautiful shot! I really like the pattern shots you take