Stay-at-Home Day Fifteen, Thursday 9 April 2020: Stone Fifteen

Stone Fourteen.

Stone Thirteen.

Stone Twelve.

Stone Eleven.

Stone Ten.

Stone Fifteen is a greenish-grey argillite stone with the trace fossils of worm casts in it.  I found it on Gemstone Beach and it came out of the polishing barrel last week.

Stone Fifteen.

Other side of Stone Fifteen.

Stone Fifteen.

Stone Fifteen.

Side view of Stone Fifteen.

A “trace fossil” is a fossil not of the animal itself but of some trace it has left behind, such as a footprint, dung or a burrowing tunnel. Fossilised worm cast stones come in a wide variety of patterns and colours. I especially like the chevron trails such as the ones in this stone. 

Stone Fifteen.

Stone Fifteen detail.

Stone Fifteen.

The first of a series of Posts on fossilised worm cast stones can be found here.

The next Post in this Series is Stay-at-Home Day Sixteen, Good Friday 10 April 2020: Stone Sixteen.

Author: tumblestoneblog

Retired Academic, male, living in the New Zealand countryside near Whanganui with his wife as well as Jasper the dog, Fluffy the cat, Dancer and Penny, the horses, and a shed half-full of stones. Email john.tumblestone@gmail.com. View all posts by tumblestoneblog