Describe what happens at a constructive (divergent) plate margin?

A constructive plate margin occurs where two or more plates move apart from each other. Convection currents within the earths mantle force magma upwards towards the Lithosphere, this melts the rock in the upper mantle and forms lava. When this lava makes its way to the surface it solidifies, forming crust which fills the gap between the separating plates. (illustrate with labels) Constructive plate margins within continents form features called rift valleys, such as the East African Rift, between the Nubian and Somali plates, and between oceanic plates form mid-oceanic ridges, such as the mid-atlantic ridge, or volcanic islands, such as Hawaii.

Answered by Toby R. Geography tutor

4385 Views

See similar Geography GCSE tutors

Related Geography GCSE answers

All answers ▸

Outline the positive and negative effects that tourism can have on fragile environments


Discuss some of the challenges faced by urban areas in the UK as a result of urban change?


What is the difference between constructive and destructive waves?


Using examples of an Earthquake, describe the effects of the disaster. (4 marks)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy