6th Annual Conference of SEPM-CES, SEDIMENT 2009
Kraków 24-25 VI 2009
Post-Conference

Post-Conference Field Trip  B3. 26 - 27 VI  [cancelled]
THE PLACE OF "BLOCK IN MATRIX" COMPLEXES IN EVOLUTION OF THE OUTER CARPATHIAN THRUST-AND-FOLD BELT

Leader:  L. Jankowski

Fee:  120 €

The purpose of the excursion is to show exposures of block in matrix-type complexes. Here are two types of them: sedimentary and tectonic in origin.

The Outer Carpathians are traditionally called the "Flysch Carpathians" but detailed field surveys demonstrate that turbidity currents were not the main mechanism of supplying clastic material to the basin, in particular, at the thrust front of the orogene. Many shallow-water and slope facies may be identified as well in Carpathian thrust-and-fold belt.

The collapse of the turbidite system of the Outer Carpathian basin caused generation of other types of sediment gravity flows. Various types of sediment gravity flows can be identified: debris flows, slumps and big slides. The slope failure events were the most frequent in Miocene time.

Broad zones of tectonic melanges have been discovered in the course of geological mapping. These zones played an important role during the tectonic history of the thrust-and-fold belt. The frequent occurrence of tectonic melanges is a proof of secondary deformation - probably out-of-sequence thrusts.

This may suggest that evolution of the Carpathian thrust-and-fold belt followed a thick-skinned model.

Usually exposures are placed in a stream valley. Rubber boots are necessary. The weather in June is difficult to predict. Rains and even storms are probable.

Bieszczady Mountains
Tectonic melange. Lanckorona-Zegocina zone Chaotic complex. Folusz
Tectonic melange. Jablonki