Crystal Mountains (''Monts de Cristal'') is a group of low mountains (or hills, as all peaks are below 1,000m) inland of the Atlantic coast of

Equatorial Guinea Equatorial Guinea ( es, Guinea Ecuatorial; french: Guinée équatoriale; pt, Guiné Equatorial), officially the Republic of Equatorial Guinea ( es, link=no, República de Guinea Ecuatorial, french: link=no, République de Guinée équatoria ...

Gabon Gabon (; ; snq, Ngabu), officially the Gabonese Republic (french: République gabonaise), is a country on the west coast of Central Africa. Located on the equator, it is bordered by Equatorial Guinea to the northwest, Cameroon to the north ...

, the

Republic of the Congo The Republic of the Congo (french: République du Congo, ln, Republíki ya Kongó), also known as Congo-Brazzaville, the Congo Republic or simply either Congo or the Congo, is a country located in the western coast of Central Africa to the w ...

, the

Democratic Republic of the Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...

, and

Angola , national_anthem = " Angola Avante"() , image_map = , map_caption = , capital = Luanda , religion = , religion_year = 2020 , religion_ref = , coordina ...

. It is the edge of the interior

Woleu-Ntem Plateau Woleu-Ntem is the northernmost of Gabon's nine provinces. It covers an area of 38,465 km and named after Woleu and Ntem rivers that cross it. The provincial capital is Oyem, which had a total of 60,685 inhabitants in 2013. As Woleu-Ntem i ...

against the coastal lowland which has a steep descent deeply cut by streams and waterfalls. Part of the area is preserved in Gabon as the

Crystal Mountains National Park Crystal Mountains National Park (french: Parc National des Monts de Cristal) is a twin park and one of the 13 national parks of Gabon. It is situated in the Monts de Crystal on the western edge of the Woleu-Ntem Plateau, between Equatorial Gui ...

. Mont Mbilan is the highest point (about 925m) in the park. Seni Mont (611m) receives the highest rainfall in all of Gabon (350 cm/year).

Fauna

Two species of frogs, ''

Leptopelis crystallinoron ''Leptopelis crystallinoron'' is a species of frog in the family Arthroleptidae. It is endemic to Gabon and only known from the area its type locality near the Barrage de Tchimbélé in the central Monts de Cristal (Crystal Mountains). Only one ...

'' and ''

Leptodactylodon stevarti ''Leptodactylodon stevarti'' is a species of frog in the family Arthroleptidae. It is known with certainty only from the area of its type locality, Monts de Cristal in northwestern Gabon. Only two specimens are known. However, there is an uncer ...

'', are only known from the Crystal Mountains.

References

Mountain ranges of Equatorial Guinea Mountain ranges of Gabon Mountain ranges of the Democratic Republic of the Congo Mountain ranges of the Republic of the Congo Mountain ranges of Angola {{Africa-mountain-stub