The physical and mechanical properties of the andesite forming much of the island of Gökçeada (Imbros), Turkey, were investigated using 54 mm samples cores from 12 blocks obtained from a quarry. The results were evaluated using regression analysis and good empirical relationships were obtained.

Whitcliffian and Downtonian macroplants of rhyniophyte morphology are described from Capel Horeb Quarry, Powys, Wales. Both floras contain Hostinella Stur, Cooksonia Lang and Steganotheca Edwards. They are briefly compared with others of similar age, and the contribution, particularly of the Whitcliffian assemblage, to our knowledge on the early colonisation of the land by vascular plants is di...

During the production of aggregates at quarry sites, elevated quantities of micro-particulate mineral dust are produced in all stages of the process. This dust contains appreciable amounts of free crystalline silica in a variety of forms which, if maintained suspended in the air in the work environment, expose the workers to the risk of developing occupational silicosis, which causes reduced ab...

New fossil collections from two Callovian (Middle Jurassic) localities of the South Hungarian Villány Hills (Villány, Templom Hill Quarry and Siklós, Rózsa Quarry) include specimens rare ammonite genus Phlycticeras sporadic Oecoptychius. A review is given herein on previously published newly found specimens. Dimorphism, as well palaeogeographical distribution genera, also briefly discussed.