April 11, 2013– PORTUGAL– Excess water in the soil may be the cause of geological phenomenon occurred in Marvão in Alto Alentejo, which resulted in the opening of a crater about 100 meters deep and 17 meters in diameter. The geologist Victor Lambert explained this Tuesday that this is “a typical phenomenon” of areas where there is limestone and soil conditions exist, though in Portugal nothing has appeared of this size.” The geologist, who develops work for research institutions and ornamental rocks, reported in the local area that has Marvão caves and type of existing rock (limestone) tends to ‘dissolve,’ forming caves. “Here in Marvão, we had lots of rain a year. The water in these structures infiltrates, circulating inside, and in lime, circulates at high speeds, ie, the impact may cause is greater,” explained. However, the geologist pointed out that the crater in Marvão is interesting, because…