Shark and ray teeth from the Hauterivian (Lower Cretaceous) of north-east England

Sampling of hiatal horizons within the Hauterivian part of the Speeton Clay Formation of north-east England has produced teeth of several species of sharks and rays, four of which are previously unnamed. One species of shark, Cretorectolobus doylei sp. nov., and two species of rays, Spathobatis rugosus sp. nov. and Dasyatis speetonensis sp. nov., are named, whilst the presence of an indeterminate triakid shark is also noted. Synechodus dubrisiensis (Mackie) is shown to be a senior synonym of S. michaeli Thies. Although the dasyatid ray and triakid shark are by far the oldest representatives of their respective families, the overall composition of the fauna is considered to resemble more closely assemblages known from the Jurassic than those from upper parts of the Cretaceous

Free Form Technology from Delft

The success of the Guggenheim Museum in Bilbao, designed and engineered by Frank O. Gehry and inaugurated in 1997, opened the eyes of the world to the plastic possibilities of Free Form Design. That is, on the side of architects and their admiring clients. Some architects draw up complicated but surprising and attractive Free Form Designs and win design competitions. The next step is to involve the manufacturing industry and the contractors in realizing these dreams. According to the author(s), the desire and logic for an adapted Free Form Technology will become became apparent after more designs. At Mick Eekhout’s design & build company Octatube the first experiences with Free Form Designs either failed, were aborted, were a disaster or led to unfortunate events such as the bankruptcy of competing firms who took on the projects without major Free Form Design experience. But Free Form design has matured nowadays. Many lessons can be learned from these early experiments, which is the main reason to share these experiences with readers of this book.Architectural Engineering +TechnologyArchitecture and The Built Environmen