They all look like die cracks. The most common spots to find cracks on
LMC's are Abes head and the four corners of the memorial. Seeing as how they generally start to happen when the die used to make that particular coin is nearing the end of its life and the wear and tear of making thousands of coins starts taking its toll and weakens the die. The die starts to crack and so when it strikes the blank coin, metal is forced into those cracks and takes their shape, which is why the lines are raised. The bigger the crack and the more cracks there are usually means the rarer the coin because at a certain point it's either going to be caught at the mint or much more likely the die will just shatter and fail completely. They end up resulting in some.pretty cool coins. They can carry a premium too, especially if you can find them as close as possible to the point of failure. I'm guessing that's what yours is and if so, it's one of the more advanced examples I've seen in a penny from the 90's or later, here on the forum. Nice find.