I have seven on my property, and two of them have these vertical slashes in the trunk that appear to be weeping sap. Been this way for a year or so. These are very mature trees (over 50 years?), and no other visible issues (other than a maddening amount of bark all over the ground, and dropping leaves starting in July...).
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"Go yell at an M&M"
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"Go yell at an M&M"