International Geoscience Congress followed by a sunny field campaign, Iran.
1. 1. GSI conference (16-19/02/2014)
The 1st International Geosciences Congress, organized by
the Geological Survey of Iran, started on 16th of February 2014.
After the official opening in Tehran, a quick flight and sub congress in Urmia
(NW Iran) dealing with the catastrophic human-induced drying of Lake Urmia
(which is largely caused by the construction of a solid highway through the
lake, and irrigation activities) we arrived finely in Chabahar (SE Iran, close
to the Pakistan border) to present our first IAP phase VII results at the
Marine Sciences University. The beautiful landscape and specific geological
features, such as huge mud volcanoes, badlands and raised beaches, were shown
during a splendid field excursion. With some sweet dried dates in our hands,
the views and the knowledge that old civilisations lived here long before in
the same environment makes us dream of those ancient times and… of course of
the processes behind the formation of these beautiful features.
Left: a medium-sized mud volcano near
Chabahar, right: the Mars Mountains with their beautiful badlands
2. Field campaign (20/02 – 06/03/2014)
Arriving in the early morning of 20 February in Ahwaz (Khuzestan Province) we just had time in between some local GSI meetings to visit the nearby ancient fortress city of Shushtar. Here, the Roman hydraulic water management is an example of pure geniousity. The dams built by those captured Romans would indeed give a solution to the above-mentioned drying of the Urmia lake nowadays. The Salasel fortress, built during the Parthian or Sassanid era, was largely destroyed by the Arab invasion around 642 BCE.
Left: Hydraulic water management and (middle) dam of Roman architecture, right: destroyed Salasel fortress
The day after, our hard work started in Lower Khuzestan, taking approximately 1.5 cores a day with an average of 15 m core described per day. A total of 17 cores, with a maximum depth of 11m were taken and described. The map shows the location of the cores carried out during previous campaigns and those carried out during this campaign (labelled with 14-X). We cored in different environments going from coastal mudflats, freshwater swamps, sabkhas and playas, some of them disturbed by human activity. These different environments (and other) are also recorded in the sediments of the subsoil. It is our challenge to make their reconstruction through time.
Map showing all the cores in our study area (including previous campaigns). Cores taken during our 2014 campaign are labelled as 14-x
Top left: tidal gully at core 14-8, top right: dune formation
close by a playa, bottom: a splendid example of sub-tidal deposits around 10 m
depth with daily tidal changes with moreover neap and spring tide sequences
The last core was sampled entirely for palynological and microfossil research resulting in a 15 kg weighting box to be placed in our baggage together with 5 kg samples from the other cores (for clay analyses, 14C determination, etc.). Luckily we were allowed to take 2 bags of 23 kg per person, otherwise we had to leave our boots and dirty clothes at the guesthouse.
Left: coring and describing on a cold
morning. Right: a too powerful performance after eating kebab.
The use of the Edelman corer, the gauge auger, the spiral corer and a bag filled with extension rods was all we needed to get nice undisturbed samples of the subsurface. A crazy madman driving our first jeep and an old petrol-smelling jeep, which lost now and then some important motor screws, and finally got stuck on some small muddy roads, turned our campaign into an ‘old-fashion safari experience’. The rice and kebab empowered our coring team and the nice warm sun massaged our brains and muscles.
Again, we want to thank the Geological Survey of Iran for their excellent logistic support, a special thank for Dawod the fantastic cook, Ali Reza for his strength, Javad for his organising skills and roll as core-master, Reza for his sharp observations, the drivers for keeping us alive and dr. Lak for making this fieldwork possible. A special thanks goes to our last-year ‘rock ‘n roll’ driver Farhot who passed away during our stay in Iran.
Towards a third Iran campaign ? “INSH ALLAH” !
Rindert Janssens, dr. Frieda Bogemans and prof. dr. Cecile Baeteman, Royal Belgian Institute of Natural Sciences - OD Earth and History of Life – Quaternary Unit.