Cut of a heartwood tree trunk.

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Wood fragments collected from the fossil larch trunk for 230 Th/U dating.

Katherine KUKSA, Associated Professor, PhD, Saint Petersburg State University, Saint Petersburg, SPBU, Department of Geomorphology

Anatomy of Wood - Woodcarving Illustrated

Cut tree stump with decay in the heartwood in the centre of the tree making the tree rotten and unsafe. Background of dead leaves Stock Photo - Alamy

Wood Stem Vector Vector & Photo (Free Trial)

Tree Trunk with Sickness Heartwood Stock Photo - Image of pine, brown: 180081612

Heart Wood Rot

Water Rising – Nature's Depths

How to Do a Scratch Test on Trees & Plants - Stark Bro's

The central part of the Tunka rift basin (based on SRTM digital

Stratigraphic column of the Tunka rift basin (after Logachev, 1974 and

File:Tree Rings and Heart Wood.JPG - Wikimedia Commons