twin lamella

См. также в других словарях:

• Litchfieldite — is a rare metamorphosed igneous rock. It is a variety of nepheline syenite and is composed of two near pure phases of feldspar, albite and microcline, with predominance of the first one, plus nepheline, sodalite, cancrinite and calcite. The mafic …   Wikipedia

• RAF Usworth — was a Royal Air Force station near Sunderland which closed in 1958, becoming Sunderland Airport. The site has since been redeveloped as a factory for Nissan cars following the closure of the airport in 1984. Early History The airfield that… …   Wikipedia

• building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …   Universalium