Plant roots

Additional images

Concrete roots

Although the Triassic rocks of East Devon were deposited in a desert, there were rivers flowing through it, and on the banks of those rivers grew plants. When the water stopped flowing, the river banks were parched in the sun and any water in the sediments were drawn out. In the process, minerals such as calcium became concentrated around the roots hardening into what is known as ‘Caliche’, cementing the sands and preserving the form of the roots. These fossil roots are called rhizoconcretions.

The same process is still happening today, as shown in this photo from Sal, one of the Cape Verde Islands off Africa.

Find out more on the wood and plants pages.

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Common name

Plant roots

Scientific name



Wood & Plants


Otter Sandstone

Time period



225 million years

Where found

High Peak, Sidmouth

Found by

Richard Edmonds


Fairlynch Museum, Budleigh Salterton

Accession number