I'm not going to cut down the tree to count the rings, so all I can do is use the info I find to come up with an ESTIMATE. I'll take a measurement and use the calculator I found for a start. Based on what I've read, I can also surmise that the oaks around these big ones are over 40 years old. From reading, oaks reach adult stage around 40 years and that is when they start producing acorns. I won't know for sure which trees are producing until fall, but I know when we bought the place in October there where plenty of acorns in those woods.
I also have a large oak that uprooted on the property, it's a fraction of the size of this one but definitely a mature tree. When I get that one cut up, I'll count the rings at the base. Once I have the rings counted on it, and can compare that to the age calculator results and determine how close the calculator is for trees on my property. Then I can post a pic of that tree (with exact age) in front of the big tree for reference.
I hear loud and clear that I can't get the exact age without counting rings, but I'm not trying to get the exact age I'm just trying to come up with an estimated age.
I also have a large oak that uprooted on the property, it's a fraction of the size of this one but definitely a mature tree. When I get that one cut up, I'll count the rings at the base. Once I have the rings counted on it, and can compare that to the age calculator results and determine how close the calculator is for trees on my property. Then I can post a pic of that tree (with exact age) in front of the big tree for reference.
I hear loud and clear that I can't get the exact age without counting rings, but I'm not trying to get the exact age I'm just trying to come up with an estimated age.