Glaciers in Gabon

Ok, so remember I was questioning the landforms in Gabon from Survivor? Well I googled 'ask a geologist' and sent an email questioning them. I originally wrote:

Are you watching Survivor? They're shooting this season in Gabon and I've been trying to puzzle out the geography. It's taking place at the Wonga-Wongue Presidential Reserve and I'm no closer to puzzling it out. According to this description, the reserve has 'cirques' which it describes as 'rare in Central Africa'. A cirque is formed by a glacier. I don't think Central Africa ever had glaciers (outside of mountain tops). I don't understand.

Well today I got a response and he wrote that he couldn't find evidence of glaciation in Gabon either. He suggested that the landforms may look like traditional cirques and they just got labeled that. That doesn't get me any closer to finding out what they are or where they came from but it's a start!