Chene & Cie defines tight grain as less than an average of 3 mm per annual growth ring
(spring wood + summer wood); larger than this is open grain.
Annual growth rings
and rate of growth of the giant scallop, Placopecten magellanicus (Gmelin), in the Digby area of the Bay of Fundy.
This is where you remove the two bottom front teeth (called the incisors) with a pocket knife and send them to a lab to count the rings--just like you would the annual growth rings
on a tree.
Samples have been taken from English Heritage's Belsay Castle for dendrochronology examination - the science of dating events and environmental change by using patterns of annual growth rings
Management implications of annual growth rings
in Pterocarpus angolensis from Zimbabwe.
A tree with closely spaced annual growth rings
makes dense framing lumber, especially if cut after growing for two or three centuries.
We used annual growth rings
laid down in the shell to estimate the growth rate, approximate age at maturity, and life cycle length and compared these traits to the related Potamilus purpuratus (Bluefer) and Leptodea fragilis (Fragile Paper Shell).
Annual growth rings
of particular tree species are subjected to tree ring dating, cross matching or cross dating, the procedure of matching ring-width variation and other structural characteristics with in a tree and among trees that have grown in a particular area.
The annual growth rings
in trees are the most important witnesses over the past 1,000 to 2,000 years as they indicate how warm and cool past climate conditions were.
Dendrochronology is a precise science of using annual growth rings
of trees to understand climate in the past.
Similar to annual growth rings
of trees, otoliths' rings can be counted to indicate a fish's age and annual growth rate, estimated by measuring distances between each new ring.
In regions with well-defined seasonal growth, the annual growth rings
of trees provide both chronological control and a continuous time series of proxy environmental variables.