E410/0007 Rights Managed
530 pixels on longest edge, watermarked
Request/Download high-res file
Uncompressed file size: 50.1MB
Downloadable file size: 2.8MB
Credit: PROF. WALTER ALVAREZ/SCIENCE PHOTO LIBRARY
Caption: K/T boundary layer. View of the boundary layer made of clay containing iridium, between older Cretaceous (K) and younger Tertiary (T) rocks. This is known as the K/T boundary layer. It is two centimetres thick and here marked by a coin. At this locality, the layer is separated by two beds of marine limestone. The K/T layer, a phenomenon worldwide, is thought to be associated with ejected material from the impact of a large extraterrestrial object (comet or meteorite) around 65 million years ago. It has been proposed that this impact event may have been the cause of the extinction of the dinosaurs. Photographed near Gubbio, Italy.
Release details: Model release not required. Property release not required.
Keywords: cretaceous/tertiary boundary, death of dinosaurs, earth science, geology, gubbio, iridium layer, k/t bounda, k/t boundary, k/t boundary layer, kt extinction event, meteor, rock strata
High-resolution files: Approved customers can download high-resolution files directly from the site. A licence fee will be charged for the images used in your project.
