1947 P Jefferson Nickel Serious Lamination. But What Are Dark Streaks Called?

But I see them on many nickels. Like this 1938P. I do cents mostly so I am learning the difference here. Would this be like a Woody cent?

Agree with TNG immediately above. I've seen a few of these over the years.

I have mentioned this before but have always thought there was a close link between lams and woodies, even though they are considered different things, when you look at the descriptors. Lams, are considered to be caused by impurities in the alloy and a woody, and improperly mixed alloy. Here is the link for each but scroll to the very end of the woody link and read the very last sentence. I don't doubt there is a difference but they are definitely linked at times.

Lam link https://www.error-ref.com/?s=lamination

Woody link https://www.error-ref.com/?s=woodies

I forgot to add that along with discoloration from an improper alloy mix or impurities, sometimes the dark areas you see are a loss of metal, caused from a lam, that have just caught debris.

VestigeWolf, sometimes I come off a bit harsh and I'm sorry, just the way I've learned. I really am trying to help.

so, what is the verdict here? Lam, Alloy mix issue, or both?

Dearborn, my take on this particular coin, is that it is a lam, if there has to be total separation between the two but what I gather, from folks much sharper than me, you can have a woody with lam features and don't see why it could not be the other way too. I've just seen what seems to be a correlation between the two quite often.
This would be a good one for Mike Diamond to comment on.