Jagged Chain is a term used to describe a series of objects or events that are connected in an irregular or uneven way. It can be used to describe a variety of situations, such as a mountain range, a series of events, or a set of ideas. The term 'SIERRA' is a Spanish word meaning 'mountain range, ' which is a perfect example of a jagged chain. SIERRA is also the name of a mountain range in California, which is known for its jagged peaks and valleys.