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Authors of
Prof. Dr. V.J. Dietrich
Institute for Mineralogy and Petrography
ETH Zürich

Prof. Dr. Lorenz Hurni
Institute of Cartography
ETH Zürich

Project > Geological History of Sites > The Volcanic History

The Volcanic History

The Basal Volcanic Complex (ca. 160,000 to 100,000 years)
The Early Caldera Stratovolcano (ca. 100,000 to 30,000 years)
Lakki Pyroclastics and Avlaki Complex
Lacustrine and Pyroclastic Formations
The Melisseri - Evangelistra - Afionas Complex
The Emborios Complex
The Ellinika - Kyra - Lies Pyroclastic Complex
The Argos - Stavros Complex
The Main Caldera Formation (30,000 to 15,000 years ?)
The First Caldera Phase (?30,000 to 20,000 years ?)
The Second Caldera Phase (20,000 to <15,000 years ?)

The Melisseri - Evangelistra - Afionas Complex

Multiple scoria-rich andesitic lavas cover the lacustrine volcaniclastic sediments. Its thickest section (70 m) occurs at the base of the northern wall below Emborios and extends all around the caldera.

The andesitic pyroclastic unit of Melisseri, characterized by reddish pumices and scoriae, displays a fallout level at its base, followed in the most proximal section by a 30 m thick pyroclastic flow deposit, and finally a 3.5m succession of fall, surges, and pyroclastic flows.

This ubiquitous unit also shows the typical characteristics of a sub-Plinian explosive eruption, which might have been followed only by a short time interval by the eruptive phases of the Emborios complex.




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