December 18, 2011
Photographer: Graham A. Stephen; Graham's Web site
Summary Author: Graham A. Stephen
The photo above features the tidal island of Ynys Llanddwyn on Anglesey in northern Wales. This scenic island is named after the church of St Dwynwen -- Dwynwen lived here in the fifth century and became the Welsh patron saint of lovers. Along the island's coast are several outcrops of basaltic pillow lava. One such outcrop is in the cove of Porth Twr Mawr, shown here crowned with a lighthouse. Pillow lava is created when magma is extruded underwater. The emerging lava forms a skin when it is rapidly cooled by the water. A lava lobe takes shape as the skin is inflated with more lava until it bursts and the process is repeated. Photo taken on November 19, 2011.
Photo details: Camera Maker: Canon; Camera Model: Canon EOS 500D; Focal Length: 10.0mm; Aperture: f/8.0; Exposure Time: 0.0080 s (1/125); ISO equiv: 100; Exposure Bias: -1.00 EV; Metering Mode: Center Weight; Exposure: aperture priority (semi-auto); White Balance: Auto; Flash Fired: No (enforced); Orientation: Normal; Color Space: sRGB; Software: ACD Systems Digital Imaging.