They generally do not form readily fossilisable structures such as thick bark or wood.

It is protected from smaller fires by its thick bark.

Both forest giants survived the fire, probably due to their size and thick bark.

The marks of the bear's claws were still there, eight feet up the trunk, deep and twisted in the thick bark.

With the thick bark still covering them, they looked none the worse.

The trees have very thick bark and the trunks are crooked.

The growth layer, protected by the thick bark, allow a healing process to occur after damage.

Instead, it is made with the pieces of thick bark of about 200 years old red pine trees which are easy to get.

He went to a big tree and, taking out his knife, cut away a big, broad piece of thick bark.

This could possibly be due to the relative immunity from fire that the thick bark of these species gives them.