The East African orogeny resulted in the formation of an enormous mountain chain, known as the Transgondwanan Supermountain, which was more than 8,000 km (5,000 mi)-long and 1,000 km (620 mi)-wide. The sedimentary deposition from this mountain chain is known as the Gondwana Super-fan.

[u/VerGuy]

https://en.wikipedia.org/wiki/East_African_Orogeny

[u/Syncsinksank]

Was the mountains very tall

[u/Aegishjalmur18 → u/Syncsinksank]

Can't find a height estimate anywhere other than being comparable to the Himalayas.

[u/VerGuy → u/Aegishjalmur18]

Supermountains were massive mountain chains stretching up to 8,000 kilometres long—roughly three to four times the length of the modern Himalayas. Earth had two Supermountain eras: the Nuna Supermountain (2.0 to 1.8 billion years ago) and the Transgondwanan Supermountain (650 to 500 million years ago).

[u/Aegishjalmur18]

I saw that, but all the hard data is about the length of the chain, not the estimated height of the mountains in the chain.