<p>It is an extinct volcanic crater.
The location is not listed as one of the <a href="https://www.volcanodiscovery.com/madagascar.html" rel="noreferrer">active volcanoes in Madagascar</a>.</p>

<p>Simplified geologic map of Madagascar (<a href="https://databasin.org/maps/new#datasets=1a187e2f29e24e98b2c4d45c109d3bb3" rel="noreferrer">reference</a>) shows the crater to be mapped as basaltic / Gabbro lava, <a href="https://i.sstatic.net/DlAoZ.png" rel="noreferrer"><img src="https://i.sstatic.net/DlAoZ.png" alt="crater"></a></p>

CC BY-SA 3.0
2017-02-23T02:53:24.443Z
2017-02-23T14:47:24.903Z
2017-02-23T14:47:24.903Z
Earth Science Expatriate
<p>I was seeing Madagascar on Google Maps and accidentally i saw a circle shape near Bebao. Coordinates are <a href="https://www.google.com/maps/@-17.4317443,44.644248,33509m/data=!3m1!1e3" rel="nofollow noreferrer">17.4317443°E and 44.644248°S</a>.</p>

<p>Please, to satisfy my curiosity, can you tell me why is this shape like a circle? </p>

<geology><volcanology><earth-history><geomorphology><mapping>
A circle shape in Madagascar
Dejvid Myrtaj
# A circle shape in Madagascar

(Asked by: username_0 on 2017-02-22)

I was seeing Madagascar on Google Maps and accidentally i saw a circle shape near Bebao. Coordinates are [17.4317443°E and 44.644248°S](https://www.google.com/maps/@-17.4317443,44.644248,33509m/data=!3m1!1e3).

Please, to satisfy my curiosity, can you tell me why is this shape like a circle?

**Tags:** geology, volcanology, earth-history, geomorphology, mapping


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## 1 answers

### Answer by username_1 on 2017-02-23. Score: 8

It is an extinct volcanic crater.
The location is not listed as one of the [active volcanoes in Madagascar](https://www.volcanodiscovery.com/madagascar.html).

Simplified geologic map of Madagascar ([reference](https://databasin.org/maps/new#datasets=1a187e2f29e24e98b2c4d45c109d3bb3)) shows the crater to be mapped as basaltic / Gabbro lava, [![crater](https://i.sstatic.net/DlAoZ.png)](https://i.sstatic.net/DlAoZ.png)


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