Deposits of shallow-marine volcanic activity documented in the Zaječov quarry (Barrandian, Late Cambrian–Early Ordovician)

Geoscience Research Reports 42, 2009 (GRR for 2008), pages 175–178

Full text (PDF, 1.19 MB)

Abstract

Documentation of Lower-Palaeozoic volcanic rocks exposed in the Zaječov operating quarry (central Barrandian) has shown variety of volcanic and sedimentary processes. Most of basaltic to trachydacitic lavas display signs of magma-water interactions and they are interbedded with hyaloclastic material sedimented as turbidity currents- or debris flows respectively. pyroclastic deposits consisting of mixture of hyaloclasts and accretionarry lapilli argue for shallow water (first tens of meters) eruptions. Some lava facies appear to be emplaced under subaerial conditions.