1. Upper Mantle:

* Lithosphere: This is the outermost layer of the mantle, extending from the base of the crust to a depth of about 100 kilometers. It is rigid and brittle, behaving like a solid rock. The lithosphere is broken into tectonic plates that move over the asthenosphere.

* Asthenosphere: This layer lies beneath the lithosphere, extending to a depth of about 660 kilometers. It is a semi-solid, partially molten zone where rocks are ductile and can flow slowly. The asthenosphere is responsible for the movement of tectonic plates.

* Transition Zone: This is a zone within the upper mantle between 410 and 660 kilometers. It is characterized by a change in mineral composition and structure.

2. Lower Mantle:

* Lower Mantle Proper: This layer extends from the transition zone to the core-mantle boundary at a depth of about 2,900 kilometers. It is largely solid, but still experiences slow, convective movements.

It's important to note that the boundaries between these layers are not sharp and distinct. The transition zone is a gradual change in properties, and the lower mantle is not entirely solid but still exhibits some fluidity.

Here's a table summarizing the sublayers of the mantle:

| Sublayer | Depth (km) | Characteristics |

|---|---|---|

| Lithosphere | 0-100 | Rigid, brittle, solid rock |

| Asthenosphere | 100-660 | Semi-solid, ductile, flows slowly |

| Transition Zone | 410-660 | Change in mineral composition and structure |

| Lower Mantle Proper | 660-2,900 | Largely solid, exhibits slow convection |