Oldest trees in Michigan are in an area called "Hartwick Pines" and these are Northern White Pines. Most of this state was clear-cut lumbered in the 1800s (more money was made in the Michigan timber industry in the1800s than in the Gold Rush of the same dates - an amazing, sad, but true fact). Hope this helps with your project.
Marcia
tannerm@scnc.okemos.k12.mi.us