Jordi Chias / Angular roughshark (Oxynotus centrina) a deepsea species living at 80-300m depth, caught by fishermen and released, Costa Brava, Catalunya, Spain, Mediterranean Sea

Graham Eaton / An anticlinal fold in Carboniferous age sandstone and shales. This angular anticline is a kink fold with a defined fracture along the fold axis. These rocks were folded and faulted during the Variscan...

Graham Eaton / Angular unconformity, between the underlying Cambrian age sedimentary rocks and the overlying Ordovician sedimentary rocks. Trwyn Wylfa, Abersoch, Wales, August. An unconformity represents a time ga...

Mike Read / Angular solomon's seal (Polygonatum odoratum) back lit by early morning light, Haut Plateau Reserve, Vercors Natural Park, Vercors France, June 2016.

Mike Read / Angular solomon's seal (Polygonatum odoratum) Haut Plateau Reserve, Vercors Regional Natural Park, Vercors, France, June 2016.

Juergen Freund / Gibber rocks with heat mirage in the background. Gibber rocks are generally angular fragments formed from broken up duricrust, usually silcrete, a hardened crust of soil cemented by silica. South Aus...

Juergen Freund / Gibber rock and pebble littered area of arid or semi-arid country in Australia. The rocks are generally angular fragments formed from broken up duricrust, usually silcrete, a hardened crust of soil ce...

Bryan and Cherry Alexander / Angular slabs of a tabular iceberg in Hall Bredning. East Greenland, September 2005.

Philippe Clement / Angular / Scented Solomon's-seal (Polygonatum odoratum) in flower, the Ardennes, Belgium

Niall Benvie / Detail of quarried basalt, Suduroy, Faroe Islands, Denmark. June 2006

Tony Evans / Angular solomons seal amongst rocks {Polygonatum odoratum} Cumbria, UK

Tony Evans / Angular solomons seal amongst rocks {Polygonatum odoratum} Cumbria, UK