HU1- Zeolite mineralization of the dacite laccolith of Csódi Hill, Dunabogdány and sightseeing in the Danube Bend

Leaders: Erzsébet Tóth (Eötvös L. University, Budapest,, Tamás G. Weiszburg (Eötvös L. University, Budapest)

Practical information:

  • Duration: 1 day (8 AM to 7 PM)
  • Mid-conference: 24.08.2010 and 26.08.2010, Budapest (HU) - Budapest (HU)
  • Length: 100 km
  • Min. number of participants: 5 each day
  • Max. number of participants: 45 each day
  • Field trip registration fee
    • Student/young scientist: EUR 15
    • Normal: EUR 20
  • Meals cost: included in the registration fee
  • Demands: No special physical or other demands. Light field trip equipment is recommended.
  • Means of transport: bus / van
  • Accommodation: None
Full technical details in PDF format
Photo: Chabazite, stilbite and calcite from Csódi Hill (HU)
Chabazite, stilbite and calcite from Csódi Hill (HU)

Scientific focus (keywords): volcanic petrology; dacite; laccolith; zeolites; open-air museum; traditional architecture of Hungary


The first half of the field trip is dedicated to science, the second part to sightseeing.

The dacite quarry at Csódi Hill, south of Dunabogdány, exposes the Csódi Hill laccolith, which formed 14-16 million years ago (Middle Miocene) as an early product of the volcanism of the area what is now the Börzsöny and Visegrád Mts. The laccolith is a classic mineral locality in Hungary, famous for hydrothermal zeolites (chabazite "phacolite" twins, stilbite, analcime) and a variety of calcite forms. Due to the intense quarrying, going on for more than 150 years now, the structure of the laccolith is nicely exposed. Recently, the contact with the overlying Oligocene strata became again accessible. The garnet-bearing dacite of the Csódi Hill represents a special geodynamic position, and together with the contact zone, is an attraction for petrologists and geochemists, too.

The Szentendre Open-Air Museum (Skanzen) opens a window on the countryside life: it presents folk architecture, interior decoration, farming and way of life in the Hungarian language area through authentic objects and original, relocated houses arranged in old settlement patterns. A restored electric locomotive now facilitates visits.

The field trip ends with a walk in the picturesque town of Szentendre, a town that more than once in history has been settled by Serbian immigrants and this is reflected today in its houses and its beautiful churches. It has always been favoured by artists as somewhere both to live and to work, as revealed by the number of museums and exhibitions devoted to the life and work of Szentendre-based artists.
"Phacolite" (chabazite-Ca) twins with yellowish brown iron-rich saponite. The largest "phacolite" crystal is 8 cm in diameter. Collection of Gy. Várhegyi (Budapest).

Daily programme:

Budapest, Eötvös University: departure 8 AM - Dunabogdány, Csódi Hill, quarry: zeolites in a dacite laccolith -  lunch in a fishermen's restaurant by the Danube - Szentendre, open-air museum (skanzen): traditional Hungarian houses, farmhouses and villages from the medieval age to the 19th century - Szentendre: sightseeing - Budapest, Eötvös University: arrival ~7 PM

On-line registration >>

Photo: Calcite and chabazite from Csódi Hill (HU)
Calcite and chabazite from Csódi Hill (HU)

Map of the field trip with the key locations (or download Kml file for Google Earth):

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