After six years, it began to lean slightly to the left. After 13 years, it began to lean slightly to the right. Note the larger and darker bands of compression wood. At this time, the tree was injured. Note the sudden decrease in growth rate.
Spruce trees have very few resin ducts in healthy wood.
The wood is a non-resinous type. However, when the tree is injured, resin ducts, called traumatic ducts, often form. The ducts appear as dark spots in the wood. Even though the wound is not shown in the photo, you can be sure there was a wound nearby on the tree. A very narrow ring shake or separation indicates a small wound near where this specimen was cut.