"What Really Sank the Titanic: New Forensic Discoveries Solve One of History's Deadliest Mysteries"
by Jennifer Hooper McCarty and Tim Foecke
A scanning electron microscope image of a broken wrought iron sample, this time broken at right angles to the other pictures. Note that the slag pieces are intact, because they were not bonded to the iron when it broke. Note how even a slightly larger-than-normal slag piece makes a large "hole" in the iron.