Sousaki volcanic area

  • Sousaki volcanic area.
    The Sousaki volcanic area.

    Discover one of the least known volcanoes in Greece!

  • Sousaki volcanic area
    The Sousaki volcanic area
  • Sousaki volcanic area.
    Sousaki volcanic area.

A mysterious volcano

The valley where remains of the volcano, over 20 million years old, can be found. (c) Tobias Schorr
The valley where remains of the volcano, over 20 million years old, can be found. (c) Tobias Schorr

If you are on the way from Athens towards Corinth, you will see a strikingly colored gorge at the oil refineries on the right side of the mountain slope. It hides part of a 20-30 million year old volcano that still shows signs of activity. Even if it hasn't broken out for a long time, there are still active fumaroles (hot gas escapes) and mofettes (dangerous carbon dioxide gases). In the past, sulfur and alum were mined here to a small extent. There are a few caves that are better not to be entered! They emit carbon dioxide gas that you cannot smell. Choking hazard! Even when there is no wind, you should not enter the gorge. On the front part there are most fumaroles and also a place where numerous gypsum crystals have formed.
The hydrothermal activity that deposited ores can be seen in many rust-red spots. These ores are usually already heavily weathered. There is pyrite, chalcopyrite and arsenopyrite (toxic!). Blue chalcantite can be discovered as secondary minerals. A few decades ago, the geological bureau also drilled to see if the area could be used geothermally.

There are other, much older volcanic rocks in the region and at Loutraki there are several dykes (formerly volcanic vents) that contain dacite. There is also hydrothermal deposits of jasper and probably also of opal and agate.

Landscape of Sousaki

View of the rust-red rocks of Sousaki. (c) Tobias Schorr
View of the rust-red rocks of Sousaki. (c) Tobias Schorr
View of the valley of the Sousaki volcano. (c) Tobias Schorr
View of the valley of the Sousaki volcano. (c) Tobias Schorr
The landscape of the Sousaki volcano (c) Tobias Schorr
The landscape of the Sousaki volcano (c) Tobias Schorr
The Sousaki volcano is not only interesting for geologists. (c) Tobias Schorr
The Sousaki volcano is not only interesting for geologists. (c) Tobias Schorr
In the valley of Sousaki, there are numerous hot gas outlets that show that the volcano has not gone out! (c) Tobias Schorr
In the valley of Sousaki, there are numerous hot gas outlets that show that the volcano has not gone out! (c) Tobias Schorr
A unique landscape! The Sousaki volcano. (c) Tobias Schorr
A unique landscape! The Sousaki volcano. (c) Tobias Schorr
Rusty, ore-bearing rocks in the Sousaki valley. (c) Tobias Schorr
Rusty, ore-bearing rocks in the Sousaki valley. (c) Tobias Schorr
Sulfur and alum were mined in these caves. (c) Tobias Schorr
Sulfur and alum were mined in these caves. (c) Tobias Schorr
An impressive landscape! The Sousaki volcano. (c) Tobias Schorr
An impressive landscape! The Sousaki volcano. (c) Tobias Schorr
In the past, drilling was carried out for a geothermal reservoir. (c) Tobias Schorr
In the past, drilling was carried out for a geothermal reservoir. (c) Tobias Schorr
View over the Sousaki valley. (c) Tobias Schorr
View over the Sousaki valley. (c) Tobias Schorr
View of the ugly oil refinery near Sousaki and Agior Theodoros. (c) Tobias Schorr
View of the ugly oil refinery near Sousaki and Agior Theodoros. (c) Tobias Schorr
View towards Agios Theodoros. In the background you can see the volcanic peninsula Methana! (c) Tobias Schorr
View towards Agios Theodoros. In the background you can see the volcanic peninsula Methana! (c) Tobias Schorr
View towards Agios Theodoros. In the background you can see the volcanic peninsula Methana! (c) Tobias Schorr
View towards Agios Theodoros. In the background you can see the volcanic peninsula Methana! (c) Tobias Schorr
Ancient deposits of a lake that existed in the area 20-40 million years ago. (c) Tobias Schorr
Ancient deposits of a lake that existed in the area 20-40 million years ago. (c) Tobias Schorr

Fumaroles & Mofetta of Sousaki

When you enter the Sousaki valley, you first see this hill, where there are numerous gas outlets. Entering the caves is extremely dangerous! (C) Tobias Schorr
When you enter the Sousaki valley, you first see this hill, where there are numerous gas outlets. Entering the caves is extremely dangerous! (C) Tobias Schorr
Sulfur was mined in these tunnels. There is a risk of suffocation in them! (c) Tobias Schorr
Sulfur was mined in these tunnels. There is a risk of suffocation in them! (c) Tobias Schorr
Sulfur was mined in this tunnel. There is a risk of suffocation in it! (c) Tobias Schorr
Sulfur was mined in this tunnel. There is a risk of suffocation in it! (c) Tobias Schorr
A wall with gas outlets. (c) Tobias Schorr
A wall with gas outlets. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sousaki sulfur. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Sulfur at a fumarole in Sousaki. (c) Tobias Schorr
Gypsum crystals that grows on a mofette. Sousaki (c) Tobias Schorr
Gypsum crystals that grows on a mofette. Sousaki (c) Tobias Schorr
Insects and other animals suffocate in the carbon dioxide gases of the mousets from Sousaki. (c) Tobias Schorr
Insects and other animals suffocate in the carbon dioxide gases of the mousets from Sousaki. (c) Tobias Schorr
Small columns of gypsum crystals are washed out by the rain. Sousaki. (c) Tobias Schorr
Small columns of gypsum crystals are washed out by the rain. Sousaki. (c) Tobias Schorr
Small columns of gypsum crystals are washed out by the rain. Sousaki. (c) Tobias Schorr
Small columns of gypsum crystals are washed out by the rain. Sousaki. (c) Tobias Schorr