A deep crater crack typically appears as a:

A deep crater crack is characterized by its rounded appearance, which is indicative of a more significant and penetrating defect in the material. This shape suggests that the crack has a certain depth and circularity, often associated with the manner in which the material has fractured. Rounded indications can often be observed in situations where stress concentrations lead to such deep and pronounced cracks, distinguishing them from shallower or tighter cracks which would have different geometric representations. Understanding this morphology is crucial for evaluating the severity of the defect and determining the appropriate remedial actions.

Other forms of cracks, such as fine linear indications or faint intermittent lines, typically indicate different types of defects and stresses, and do not capture the depth and severity portrayed by a deep crater crack. These alternative crack forms can be more superficial or characteristic of different material failure modes, focusing more on surface-level issues rather than deeper structural concerns.