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We spent the last 3 days doing the complete profile of Lake San Josè. A huge lake of 6 by 3 km.
Our friend Chiqui, on the right, helped us a lot. He guided us and he got the boat and the motor.
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As you see, we improved our coring table. Now it is a two pieces device: a larger base and a little box on the top. In the picture you see it up side down while we transport it to the very centre of the lake. The water level in the centre was about 1.2 meters.
Here me and Bernhard during the opeation of taking out the cores. It was quite an hard work, we got 3 profile inside the lake and 2 outside with really interesting results... but, unfortunately, I need to wait for 14C before I can say anything for sure. Just as first guess...I would not say this lake has a tectonic origin...