What is a distinguishing feature of a loop fingerprint?

A distinguishing feature of a loop fingerprint is that it has one core and one delta. In the context of fingerprint analysis, the core is the central point or ridge where the pattern essentially loops back on itself, while the delta is a point where two ridge lines diverge, creating a triangular shape.

In a loop fingerprint, the ridges enter from one side, curve around, and exit from the same side, forming a distinctive pattern. The presence of one core and one delta is what differentiates loops from other fingerprint patterns, such as whorls or arches. Whorls typically have multiple cores and deltas, while arches do not feature a core at all.

Therefore, understanding the core and delta's roles in a loop fingerprint helps solidify the identification and classification of fingerprints in forensic science and immigration enforcement.