any ideas?

[kevwrenn]

sorry about picture quality, but can anyone advise what the dark lines are in the rings if this section?

[Stephen Blair]

its the tree putting up protection against rot and infection i reckon mate.

[Tony Croft aka hamadryad]

That would be my guess too, reckon this might have been instigated by a boring insect hence the barrier forming so close to cambium. What is odd is the dark ring is incomplete?

[kevwrenn]

i guess that would fit in with the tree being removed due to dutch elm disease then.......

[Mark Bolam]

Biro.

[kevwrenn]

no, they dont trust us with anything as sharp as a biro.

[Mark Bolam]

[Bundle 2]

That would be my guess too, reckon this might have been instigated by a boring insect hence the barrier forming so close to cambium. What is odd is the dark ring is incomplete?

 

Think I would explain that by looking to the science of the wood anatomy. The ring fails to complete ( in both cases ) as it gets physically closer to the heartwood. We can say two things as result of this.....The wood is tension wood. Therefore mechanically altered in comparison to "normal" wood. This will affect the advance of decay.

It will affect CODIT ( as resources differ..ie, tylosis,suberin and so on; and mobilisation of these resources, the defence system .. )

[Stephen Blair]

The wood is tension wood. )

 

how can you tell?

[Bundle 2]

how can you tell?

 

The position of the pith as it appears in the picture in the first post. ( Pith...google it:001_smile: )

The growth rings continue to form but with an "eccentric' centre....This tells us something of the forces that the tree was under at the time this wood was "laid down" as we arbs are so keen on saying!! ( which put another way means "formed" )