Classroom lesson · Limbe's Black-Sand Beaches · 🇨🇲 Cameroon

Limbe's Black-Sand Beaches

Beaches made from ancient volcanic lava

Dark volcanic sand beach at Limbe, Cameroon, with the ocean beyond

Photo · Wikimedia Commons

What is it?

The beaches at Limbe, a coastal city in south-west Cameroon, are famous for their striking black sand. Unlike the golden or white sand you find on many beaches, this sand is made from volcanic rock that was once lava pouring down from nearby Mount Cameroon. Over thousands of years, waves broke it into tiny dark grains.

Tell me more

Most sand is made when rocks or shells are slowly broken down by waves and wind over millions of years. At Limbe, the rock that broke down was dark volcanic basalt - the same kind of rock that forms when lava cools. This gives the sand its beautiful black, grey and deep-brown colours. The sand feels slightly coarser than typical beach sand.

Limbe sits right at the foot of Mount Cameroon, next to the Atlantic Ocean. The town is lush and green because it rains a lot - the mountain catches clouds rolling in from the sea. Palm trees line the shore and the warm ocean water is perfect for swimming. The combination of black sand, green palms and blue sea makes Limbe's beaches look quite unlike anywhere else.

Limbe is also home to a brilliant wildlife centre where rescued chimpanzees, gorillas and other primates that have been found in need of care are looked after. Visitors can watch the animals and learn about efforts to protect them. So a trip to Limbe can include both a beach day and a wildlife adventure.

Local fishermen launch colourful wooden boats from the black-sand shores every morning. Fresh fish is sold right on the beach and cooked in nearby restaurants. The harbour area is always busy with people, colour and the smell of grilling seafood - a wonderful mix of the ocean and everyday Cameroonian life.

In the classroom

Walk your class through this in 15 minutes.

Talk together

Discussion prompts

  1. 01Most beaches have golden or white sand. How do you think visitors feel when they first see black sand?
  2. 02Lava becomes rock, rock becomes sand - how long do you think that journey takes?
  3. 03If you could design your perfect beach, what colour would the sand be and why?
Try this

Classroom activity

Collect or draw three different types of 'sand': golden sand (from a regular beach), white sand (from crushed shell), and black sand (from volcanic rock). Write a label for each explaining where it comes from and what makes it special. Then sort them by the size of the grains - which do you think would feel roughest underfoot?