THE GEOLOGISTS AT PRAGUE: AUGUST 1968. HISTORY OF THE INTERNATIONAL UNION OF GEOLOGICAL SCIENCES

Facies variation and mineralization in Central Europe from the late Paleozoic through the Cenozoic

The aulacopleurid trilobite Otarion, with new species from the Silurian of northwestern Canada

U-Pb zircon and Sm-Nd dating of Moldanubian H P /H T granulites from South ohemia, Czech Republic

Crustal anisotropy from local observations of shear-wave splitting in West Bohemia, Czech Republic

Geochemistry and mineralogy of Proterozoic metal-rich black shales from the Bohemian Massif, Czech Republic, with a description of possible new molybdenum selenide and telluride phases

Development of interstratification in K- and NH 4 -smectite from Jelsovy Potok (Slovakia) treated by wetting and drying

Oldest representative of the family Palaeozygopleuridae (Gastropoda) with notes on its higher taxonomy

Discrimination of chemical explosions and earthquakes in central Europe—a case study

Smectite to illite conversion in bentonites and shales of the East Slovak Basin

Subducted continental margin imaged i n the Carpathians of Czechoslovakia

Stephanocrinus (Echinodermata, Blastozoa) from Europe

A fluid inclusion study of Au-W stratiform mineralization at Orlik near Humpolec, Czechoslovakia

Effects of sillimanite-grade metamorphism and shearing on Nb-Ta oxide minerals in granitic pegmatites, Marsikov, northern Moravia, Czechoslovakia

Volcanoclastic minerals of some Czechoslovakian tonsteins and their alteration

A descriptive model for silver-lead-zinc veins in clastic metasedimentary terranes

Mrazekite, Bi 2 Cu 3 (OH) 2 O 2 (PO 4 ) 2

Mode of life of a new onychochilid mollusc from the Lower Devonian of Bohemia

An organic geochemical study to compare Jurassic black shale-hosted manganese carbonate deposits; Urkut, Hungary, and Branisko Mountains, East Slovakia

Stable isotope study of Variscan vein Pb-Zn-Ag mineralization of the Bohemian Massif