The vanishing boundary of plates is the boundary between two converging and vanishing plates.

the growth boundary is the boundary between two separated plates.

Example: Any collision between Asia-Europe plate, Africa plate, Antarctica plate and Indian Ocean plate is called extinction boundary; The growth boundary is a mid-ocean ridge (ridge) formed by the American plate, the Eurasian plate and the African plate in the middle of the Atlantic Ocean.

extinct plates are prone to form trenches and orogenic belts. Equivalent to trench or ground suture.

It can be divided into two sub-categories: the oceanic plate subducts under another plate at the trench, which is called subduction boundary, and the modern subduction boundary is mainly distributed around the Pacific Ocean; The collision boundary is called the collision boundary when the oceanic plate subducts completely and the two continents meet and meet. The Alps-Himalaya belt on the southern edge of the Eurasian plate is a typical example of the plate collision belt.

Extended information:

1. Basis for dividing plate boundaries:

Structure, activity and internal integrity of plate edges.

2. Plate boundary types:

Discrete boundary represented by mid-ocean ridge, convergent boundary represented by subduction zone and conservative boundary represented by transform fault.

Baidu Encyclopedia-the boundary of extinction

Baidu Encyclopedia-the boundary of growth.