Chiarcagua , found on the MSN Encarta map pretty well fits the bill for location and the spelling is close enough to the ones in the news reports. I'll adjust the placemark in the initial post to place it.

It appears to be near a lake bed in an area where the water table is close to the surface. There's a good chance there could be hot springs there.

EDIT: More recent information puts the likely crater back closer to the original description. I've edited the original post placemark to a polygon covering probable area of the crater.

EDIT: Carancas found in a database, so the location of the placemark in the initial post has been moved again. I'm so