GEOLOGY

Detailed explanation-1: -The farer away from the ridge the ocean crust is the older the crust is. The oldest crust is at edges of the ocean. One place where the crust is the oldest is at edge of a subduction zone . It is here that the oldest ocean crust is pushed under a continental crust and destroyed.

Detailed explanation-2: -Cratons are the oldest and most stable part of the continental lithosphere. These parts of the continental crust are usually found deep in the interior of most continents.

Detailed explanation-3: -Herodotus Basin is thought to be 340 million years old Now, this region, called the Herodotus Basin, has been shown to be 340 million years old-the oldest ocean crust on Earth that remains under the sea, according to a study published online today in Nature Geoscience .

Detailed explanation-4: -The oldest seafloor is comparatively very young, approximately 280 million years old. It is found in the Mediterranean Sea and is a remnant of an ancient ocean that is disappearing between Africa and Europe.

Detailed explanation-5: -Age of the crust: Comparing the ages of the oceanic crust near a mid-ocean ridge shows that the crust is youngest right at the spreading center, and gets progressively older as you move away from the divergent boundary in either direction, aging approximately 1 million years for every 20-40 km from the ridge.