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The empty Black-sea Cavity

7 000 km west of the Toba volcanic eruption, the Caucasus mountains stretched (and still do) from the Black sea to the Caspian sea.

The Illoreaen saga is based on the premise that up to approximately 8000 years ago the Black sea had not yet filled up. At the Ice-age maximum the sealevel was 200 meters lower than at present  and many areas, now inundated, were still dry ground. As sea levels rose the Mediterranean Sea breached a sill in the Bosphorus strait.


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The first book in the ILLOREAEN SAGA series, ‘CATASTROPHE! (available on kindleor UK), is available now. The series are set in the time  before, during and immediately after the Toba super volcano Catastrophe. It tells the tale of how a few survivors managed to escape the world-wide destruction and established a foot-hold where humans could start anew.


  • The Black sea  is currently more than 2 km deep with up to 16 km of silt below the bottom.
  • At the time the trough now called the Black Sea was not connected with theMediterranean Sea and was probably nearly empty.
  • Areas below sea level are warmer than at sea level (and areas above are colder).
  • Deep down the atmospheric air pressure is much higher than at sea level, allowing strange creatures to live down there. Creatures that won’t survive at the lower air pressures near sea level.

Before the Toba Super Volcano Eruption the cold dry Ice-Ages had already lasted for 50 000 years (interspersed with warmer periods). During the Ice-Age little rain fell, the ice sheets did not melt much, not even in summer since the ice reflects sunlight’s heat. The area of the mediterranian was much smaller and the total effect was that the area round the Caucasus, where the Clans lived, was mostly desert.

Another assumption is that, seventy thousand years ago, the great rivers of today carried less water and emptied into the shallow Caspian Sea and Mediterranea Sea. The Caspian Seawas also much smaller in size compared to today, even though capturing much of the water now flowing towards the Black sea.

According to the reference below, the thickness of the sediment layer of Black Sea abyssal plain varies from 8 to 16 km

Black Sea depth

The Black Sea maximal depth point is 2212 m.

Our premise is that the sediment layer was laid down after the Toba and the Campanian ignimbrite eruption, 35 000 years after the Toba erruption. Both of which dumped cubic kilometer of ash on the plains around the black sea. The ice sheets created even more fine dust particles by grinding the rocks over which it moved, creating the cave containing loess layers throughout the area and beyond. Much 0f these materials washed into the Black Sea trough when rain returned millinnia later and created the many kiolmetre deep silt deposits.

At the time of our story the huge trough the Clans called the Chasm (and is now the Black Sea), was many kilometres deep and the air thick and dense at the deepest points.


Kodori Canyon depth profile

Kodori Canyon Depth profile:

Depth profile


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